# Ultra-Vanshield® ## RFI/EMI dual elastomer shielding gaskets ## products corporation **welcome** Our manufacturing capabilities are full service in the silicones and high performance elastomers arena, and are fundamental in our compounding of raw silicone and elastomer materials. Each application is designed for your specific requirement, whether it be heat resistance, chemical compatibility, physical properties such as resiliency, tensile strength, durometer, etc., or cost effectiveness. Extrusions and moldings are processed to exacting tolerances. The end result of our tightly controlled manufacturing systems is top quality standard and custom elastomeric products delivered in a timely fashion, to your specifications, clean, and neatly packaged. Our quality department is customer oriented and discerning to the highest order, and is structuring the quality system to meet the ISO 9002 guidelines for certification. Our technical staff are trained problem solvers, so, send us your toughest issue, and let us take your RFI/EMI sealing worries off of your desktop! Our investigation and research has resulted in several new product developments. The Microbridge® gasket is the newest offering, utilizing new technology of placing extremely thin conductive traces through a traditional elastomeric extruded strip, D-bulb, or T-wiper. The benefit of this unique technology is that an EMI shield of high shielding effectiveness is coupled with increased galvanic stability, easier compressibility, and cost effectiveness. The precious metal traces are so thin that these gaskets can be competitive with all technologies on the market today! The traces can be “tuned” or placed so as to utilize slot length phenomena to attenuate EMI noise. If necessary, the gasket can have single, dual and even multiple traces throughout its cross-section. The possibilities for customization are almost endless! You will also find a full line of Ultra-Vanshield® style EPDM dual elastomer tubings with a thin silver-filled EPDM outer layer. The benefits are many, with the nuclear￾biological-chemical resistance and absence of silicone outgassing being foremost. Additionally, several process improvements have been made to our standard line of Ultra-Vanshield® coatings, offering a very abrasion resistant, high shielding effectiveness, and cosmetically attractive series of formulations referred to as pewter silver-laden silicone. Lastly, we have included “quick-start” PSA with an extended liner edge to ease installation, and also a series of rigid carrier PSA’s to enable quicker, easier, more user-friendly installation. Our focus is on your changing needs. Your inquiries are welcome. We are proud to introduce you to the innovative concept of Dual-Elastomer conductive RFI/EMI gaskets – they are the result of years of research and application development. Ultra-Vanshield® Dual-Elastomer gaskets represent a significant step beyond the traditional bounds of other products found in the RFI/EMI compliance marketplace. They offer a unique opportunity to enhance your products, providing more value for your customers. To further support your requirements, our people maintain a solid commitment to service – whether it be product, pricing, delivery, or general information. We are attuned to getting you results in a personable, timely manner and to making your own issues our own issues. In this way, long lasting relationships have been built with our customers. Our sales staff are degreed engineers, and have an ability to help in all areas, including design, product enhancements, and cost savings – working with you always to serve your needs. Original equipment manufacturers and fabricators will find a complete line of RFI/EMI shielding gaskets from our standard catalog which includes our ability to manufacture their own custom designs. With extensive experience in customs manufacturing, our engineering group will assist in full scale sealing design if required. Additionally we offer a complete line of extruded elastomers, injection and compression molded elastomeric articles, LIM silicone, seals, O-rings, gaskets and weather stripping. Co- and multiple-extrusions are available based on your custom designs. We specialize in extraordinary requirements. 87 Newtown Road • Danbury, CT 06810, USA tel: 203-744-7265 fax: 203-798-2351 e-mail: info@vanguardproducts.com www.vanguardproducts.com --- ## Our manufacturing capabilities are full service in the silicones and high performance elastomers arena, and are fundamental in our compounding of raw silicone and elastomer materials. Each application is designed for your specific requirement, whether it be heat resistance, chemical compatibility, physical properties such as resiliency, tensile strength, durometer, etc., or cost effectiveness. Extrusions and moldings are processed to exacting tolerances. The end result of our tightly controlled manufacturing systems is top quality standard and custom elastomeric products delivered in a timely fashion, to your specifications, clean, and neatly packaged. Our quality department is customer oriented and discerning to the highest order, and is structuring the quality system to meet the ISO 9002 guidelines for certification. Our technical staff are trained problem solvers, so, send us your toughest issue, and let us take your RFI/EMI sealing worries off of your desktop! Our investigation and research has resulted in several new product developments. The Microbridge® gasket is the newest offering, utilizing new technology of placing extremely thin conductive traces through a traditional elastomeric extruded strip, D-bulb, or T-wiper. The benefit of this unique technology is that an EMI shield of high shielding effectiveness is coupled with increased galvanic stability, easier compressibility, and cost effectiveness. The precious metal traces are so thin that these gaskets can be competitive with all technologies on the market today! The traces can be “tuned” or placed so as to utilize slot length phenomena to attenuate EMI noise. If necessary, the gasket can have single, dual and even multiple traces throughout its cross-section. The possibilities for customization are almost endless! You will also find a full line of Ultra-Vanshield® style EPDM dual elastomer tubings with a thin silver-filled EPDM outer layer. The benefits are many, with the nuclear￾biological-chemical resistance and absence of silicone outgassing being foremost. Additionally, several process improvements have been made to our standard line of Ultra-Vanshield® coatings, offering a very abrasion resistant, high shielding effectiveness, and cosmetically attractive series of formulations referred to as pewter silver-laden silicone. Lastly, we have included “quick-start” PSA with an extended liner edge to ease installation, and also a series of rigid carrier PSA’s to enable quicker, easier, more user-friendly installation. Our focus is on your changing needs. Your inquiries are welcome. We are proud to introduce you to the innovative concept of Dual-Elastomer conductive RFI/EMI gaskets – they are the result of years of research and application development. Ultra-Vanshield® Dual-Elastomer gaskets represent a significant step beyond the traditional bounds of other products found in the RFI/EMI compliance marketplace. They offer a unique opportunity to enhance your products, providing more value for your customers. To further support your requirements, our people maintain a solid commitment to service – whether it be product, pricing, delivery, or general information. We are attuned to getting you results in a personable, timely manner and to making your own issues our own issues. In this way, long lasting relationships have been built with our customers. Our sales staff are degreed engineers, and have an ability to help in all areas, including design, product enhancements, and cost savings – working with you always to serve your needs. Original equipment manufacturers and fabricators will find a complete line of RFI/EMI shielding gaskets from our standard catalog which includes our ability to manufacture their own custom designs. With extensive experience in customs manufacturing, our engineering group will assist in full scale sealing design if required. Additionally we offer a complete line of extruded elastomers, injection and compression molded elastomeric articles, LIM silicone, seals, O-rings, gaskets and weather stripping. Co- and multiple-extrusions are available based on your custom designs. We specialize in extraordinary requirements. --- # 1 **table of contents** # 2 **dual-elastomer RFI/EMI shielding gaskets** Descriptive overview and facts about innovative dual-elastomer coextruded gaskets for use in RFI/EMI applications. # 3 **applications & performance** Versatile applications in most common situations. Long-term aging considerations and flexibility regarding a wide variety of shapes, sizes and attachment methods. # 4 **RFI/EMI gasket design** Electrical and mechanical endurance factors, and design considerations for most common RFI/EMI shielding needs. # 5-11 **product assortment** Standard shapes, sizes and options for a wide variety of attachment alternatives and compression requirements. Special purpose high performance EPDM shielding gaskets on page 11. # 12-13 **material properties** Specific electrical and mechanical ordering alternatives using various inner core materials and outer conductive jackets. # 14 **installation guidelines** Simple guidelines to assure proper fit and long-term effectiveness. Sizing, compression ranges, attachments and RFI shielding effectiveness are covered. # 15 **ordering guidelines** Ordering instructions including outer conductive jacket and inner core alternatives. # 16 **Van-Therm® heat conducting elastomer** Thermal management material conformable to most interface surfaces in standard and custom profiles # 17 **customs and prototypes** Extrusions, O-rings, moldings, spliced parts, die-cuts, assemblies and prototyping. Quick turnaround tooling and sample preparation. --- ## ULTRA-VANSHIELD® DUAL ELASTOMERS offer the optimum combination of metallic conductivity and elastomeric performance. - Resilient inner core remains free of metal fillers, resulting in optimum compression and aging properties. - Silver conductive material is only present in the outer thin membrane, resulting in excellent conductive properties. - Thin silver layer permits reduction of costly silver content required. - Attenuation performance is not degraded under full compression as with solid-filled elastomers. - Very low compression force and resistance to deformation. - Manufacturing flexibility and quick turnaround of custom designs. Viable short run alternative. - Easy termination. No requirements for end treatment. - Available with a variety of optional conductive metals. See related information on pages 12, 13 and 15. Other gasket designs, while having certain acceptable application-specific features, tend to be limited in a general purpose sense. Specifically, some of the common types lack many of the intrinsic features necessary for effective long-term shielding. Meshes have very high compression forces and poor compression set properties along with a limited range of deflection. Environmental sealing of the tandem designs increases the compression forces and is often an unsatisfactory compromise. High frequency performance varies widely. Terminated ends can allow escape of loose slivers. Standard filled elastomers have poor mechanical properties due to the presence of metal fillers throughout. Common limitations include very high compression forces, undesirable compression set, brittleness, poor aging characteristics and high cost. Some designs lose attenuation properties beyond 50% compression of relaxed height. Beryllium copper gaskets are expensive and require even more added expense for platings to protect from corrosion. In addition, they lack good environmental sealing options. Clad foams have low attenuation, a limited range of compression, poor compression set properties, and designs are limited due to the manufacturing process and the conductive materials available for the cladding. **Table 1. Comparison of common RFI/EMI gasket types** | GASKET TYPE | COMPRESSION FORCE UP TO 1GHz deflection | SET RANGE (% free height) | ATTENUATION (dB) (% free height) | COST | |---|---|---|---|---| | ULTRA-VANSHIELD | 110dB | Low | None | 80-90% | Moderate | | Mesh | 60-100dB | High | 12-20% | 40-60% | Moderate | | Filled Elastomers | 90-100dB | High | 7-15% | 40-60% | High | | Beryllium Copper | 100dB | Medium | 1-2% | 85-90% | High | | Clad Foam | 60-80dB | Low | 15-20% | 70-80% | Moderate | The challenge for the RFI/EMI industry has been to create a highly conductive shielding gasket that maintains its mechanical integrity long-term. Dual Elastomer ULTRA-VANSHIELD® is definitively the unique solution to this problem. Each style incorporates design features not commonly found in other forms of shielding gaskets. Some of the more important advantages to consider are: - Continuously extruded high-strength silicone rubber core - Co-extruded highly conductive metal￾filled silicone outer layer - Extremely high shielding effectiveness - Environmental sealing - No compression set - Low compression force - Extreme environment and abrasion￾resistant options - Simple installation options Silver-filled elastomers have long been used for shielding against electromagnetic interference and radio frequency signals. Silver was chosen since it is an excellent conductor and is one of the few materials that can be put into a rubber matrix while retaining its conductivity. However, standard silver-filled elastomers have intrinsic problems. Typically, the percentage of silver in the elastomer is extraordinarily high – as much as 70% by weight. At these concentrations, the elastomer matrix loses most of its desirable physical attributes. The result is neither the desired metallic nor elastomeric properties, but rather a compromise between both. For this reason, conventional silver-filled elastomers have poor physical properties; i.e. low tear resistance and tensile strength along with inordinately high compression forces. **Figure 1. Typical Dual Elastomer gaskets** Ultra-Vanshield® patent no. 4,968,854 other patents pending conductive outer layer resilient elastomeric inner core --- ## 3 ## Ultra-Vanshield® applications ### ELECTRONIC ENCLOSURE USES Seams Doors Back Panel I/O’s Removable Panels Bezels Control Openings Vents ### PRODUCT FORMS Gaskets Seals O-Rings Grounding Pads Die-cuts I/O Interface Gaskets ### APPLICATIONS RFI/EMI Shielding Grounding Electrostatic Discharge (ESD) Electromagnetic Pulse (EMP) ### TYPICAL EQUIPMENT Computers Data Processing Telecommunications Instrumentation Medical Diagnostics Industrial Controls Office Products Automotive Dual elastomer extrusions can be made in a wide range of cross-section profiles. Flexibility in geometry is an important concept for a designer to consider. A variety of profiles are now available and almost any shape can be tooled. Simple means of mounting ULTRA-VANSHIELD® gaskets include metal C-clips, rivets or pressure sensitive adhesive tape. The conventional tape used is a non-conductive pressure sensitive adhesive which adheres well to rubber, metal or plastic. Conductive adhesive tapes are also available. Another alternative is a press-fit mounting into a groove. One such gasket is used in the telecommunications industry as shielding for cellular telephones. The overall diameter is in the range of 1 to 2 mm while still retaining all conductive and mechanical properties of larger gaskets. See page 14 for installation attachment methods and optional configurations. The elastomeric material greatly resists change due to heat exposure. In fact, it is formulated to function optimally at temperatures from -100ºF up to +480ºF (-75ºC to +250ºC) , making it ideal for applications in the automotive industry and in other high temperature situations. ULTRA-VANSHIELD® components are formulated for flammability resistance which meets ASTM Specification D4205-93, subsection 15.6, horizontal burn (HB). Additionally, ULTRA-VANSHIELD® materials can be formulated to meet ASTM D4205-93, subsection 15.6 for vertical flame resistance specification (V-0). Endurance tests of ULTRA-VANSHIELD® dual elastomer gaskets through 25,000 cycles of repeated compressions indicate no change in volume resistivity and no measurable compression set (Table 2). Accelerated aging tests provide similar results with almost no change in volume resistivity (Table 2). | TEST DESCRIPTION | MEASUREMENT RESULT | |---|---| | Elevated Temperature Volume resistivity | Immediate 0.001 ohm-cm | | 70 hrs @ 437ºF | 0.0025 ohm-cm | | performance at 70 hrs @ 212ºF | 0.001 ohm-cm | | 80% relative humidity 70 hrs @ 100ºF | 0.002 ohm-cm | | Endurance Resistance To Relaxation Volume Resistivity | No change | | Repetitive compressions, Surface Resistivity | No change | | 10/minute, 25,000 cycles, Relaxed Height | No compression set | | 0% to 25% compression, Instron Physical Tester | | **Table 2. Long-term performance characteristics** --- ## performance specifications minimizing the effects of enclosure openings The full potential of dual elastomer gasket technology is now being realized. Shielding effectiveness with an attenuation of 110dB in the frequency range of 30 MHz to 1GHz is attainable (MIL SPEC G-83528, para 4.6.12) (Figure 2). Any design used to block the RF signal between its source and a receiver is an electromagnetic interference (EMI) shield. The measure of this ability to attenuate RF is shielding effectiveness (SE), which is expressed in decibels, (dB), the ratio of field strength on one side of the shield to the other side. Figure 4 shows the relationship between shielding effectiveness (in dB), the attenuation, and attenuation percentage. ULTRA-VANSHIELD® dual elastomer gaskets typically exceed 110dB shielding effectiveness regardless of shape, size or compressed state beyond 10% of relaxed height. The silicone rubber foundation is most resistive to permanent deformation, contaminant’s and other environmental influences. The accelerated aging data on page 3, table 2, exhibits very high performance results at elevated temperatures and repeated compressions over extended time periods. The same continued performance under most application conditions can be expected. Due to the pliable properties of the unfilled elastomer core, these extrusions promise to have the best possible aging and long-term shielding properties (Figures 3 & 4). Anywhere high speed electronics are present, their operating frequencies usually must be controlled within specified government designated regulations. The radio frequencies emitted can interfere with other nearby electronic equipment as unwanted RFI/EMI, radio frequency interference / electromagnetic interference When a solid enclosure is not practical, due to the need for access panels, controls, doors, vents or seams, RFI shielding gaskets are used to maintain electrical contact between mating surfaces. See figure 5. The shielding effectiveness of an enclosure is a function of the wavelength of the frequencies involved versus the length of the longest openings. See figure 6. A proper gasket installation effectively reduces the slot length. Low compression force is very desirable to facilitate easy closing of mating surfaces. Correct installation of the dual elastomer gasket between mating surfaces of an enclosure slot assures continuous electrical coupling along its axis, and long￾term shielding effectiveness. Effectively, the shielding gasket is a connector of one mating surface to another. This permits the electronic enclosure to respond as one continuous absorber of the undesirable high frequency energy by limiting the passage of these radio waves. **Figure 2:** FREQUENCY (Hz) … ATTENUATION (dB) … % COMPRESSION OF TUBULAR GASKETS … SURFACE RESISTANCE (ohms) … FORCE (lb./in.) REQUIRED TO COMPRESS … **Figure 3:** ATTENUATION RATIO vs. FREQUENCY **Figure 4:** SHIELDING EFFECTIVENESS vs. ATTENUATION vs. COMPRESSION DISTANCE **Figure 5:** INSTALLATION BETWEEN MATING PANELS **Figure 6:** slot length phenomena **Figure 7:** COMPRESSION DISTANCE vs. SHIELDING EFFECTIVENESS --- ## 5 ## Ultra-Vanshield® RFI/EMI dual elastomer shielding gaskets ### For groove mounting Installs easily by pressing into position. Recommended mounting groove width should be 10% less than the O.D. dimension for mechanical press fit. **tube** | PART NUMBER* | O.D. | I.D. | |---|---|---| | 2250 | 0.76 | 0.51 | | 2251 | 1.02 | 0.56 | | 2300 | 1.02 | 0.71 | | 2350 | 1.14 | 0.71 | | 2375 | 1.35 | 0.78 | | 2400 | 1.57 | 0.99 | | 2450 | 1.80 | 1.00 | | 2500 | 1.85 | 1.12 | | 2550 | 2.29 | 1.14 | | 2600 | 2.49 | 1.57 | | 2610 | 2.62 | 1.98 | | 2650 | 2.80 | 2.36 | | 2700 | 3.18 | 3.18 | Conductive Surface Allows the lowest compression force while maintaining excellent electrical contact with mating surfaces. Groove mounting or pressure sensitive adhesive. Available only in straight lengths. **angle-fold** The dart segment press-fits into a slot allowing the tubular shaped contact bulb to incur heavy side-loads when contact with mating surfaces is in a shear direction. To determine correct slot dimension for mounting, add .006”-.012” (0,15-0,30 mm) to W1 dimension. **tube dart** (Parameters shown: W2, W1, H1, H2, T, R). Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters. **D-shape dart** The dart segment press-fits into a slot. This allows the D-SHAPE contact bulb to incur heavy side-loads when contact with a mating surface is in a shear direction while maximizing the contact area. To determine the correct slot dimensions for mounting add .006” - .012” (0,15-0,30 mm) to W1 dimension. (Parameters shown: H, D, S, T, W2, W1, H1, H2, S, W3). Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters. --- ## 6 ## Ultra-Vanshield® RFI/EMI dual elastomer shielding gaskets **square** Provides the largest contact surfaces at even the slightest compression. Easy groove mount or pressure sensitive adhesive installation. **rectangle** Especially useful when a small dynamic range of compression or a low profile is necessary. Easy installation by groove mounting or pressure sensitive adhesive. **PART NUMBER* H W I.D.** (list shown) 8062, 8125, 8130, 8134, 8251, 8376, 8380, 8453, 8454 **PART NUMBER* H W** (list shown) 7000, 7030, 7062, 7080, 7125, 7250, 7375 **P-shape** Wide lower contact surface assures stable mounting. Installation options include groove mount, clip-strip or standard pressure sensitive adhesive. Reliable electrical contact at all force angles. **D-shape** Popular D-SHAPE cross-references to other mesh, elastomer, and copper strips as exact replacement. Pressure sensitive adhesive mounting or standard groove mounting is recommended. *** For ordering options, add the suffix nomenclature shown on page15.** Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters --- ## 7 ## Ultra-Vanshield® RFI/EMI dual elastomer shielding gaskets **bulb** Same general features as the P-SHAPE gasket with the addition of a tandem environmental seal to assure protection from moisture and contaminant’s. Groove mounting or standard pressure sensitive adhesive mounting. environmental seal double bulb (Parameters shown: W, S, H, T, E(TYP), Conductive Surface, Environmental Seal, Adhesive Tape) **ultra-vanshield® clip** Conductive Surface; Metal Clip; Optional Environmental Seal. (Part numbers shown in tables; see page image.) **U-channel** Permits opposing contact surface to enter the U-channel opening while making three points of contact. For edge mount applications. Panel Mounting (part numbers shown) **PART NUMBER* W H G T** 85001, 85002, 85003, 85004, 85010 * For ordering options, add the suffix nomenclature shown on page15. Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters --- ## 8 ## Ultra-Vanshield® RFI/EMI dual elastomer shielding gaskets **sponge-filled** Conductive Surface Sponge Core O.D. G-bulb Special lower hook section slips through appropriate slot size for a quick and easy installation. Can also be notched intermittently along the hook side for easy installation in intermittent grooves. environmental seal double-D Two symmetrical contact bulbs - one with a conductive outer layer to make contact between the mating surfaces. The other is a dedicated environmental seal, normally installed with the environmental segment closest to the source of outside influences. For groove mount or pressure sensitive adhesive mounting. **tube D-shape** (Parameters shown: Conductive Surface, Sponge Core optional, Adhesive Tape, H, D, W) **Most of the hollow shapes shown in the Dual Elastomer ULTRA-VANSHIELD® assortment of profiles are available with a resilient, compression set resistant silicone sponge rubber core, permitting thinner wall sections and even lower compression forces.** The sponge rubber is co-extruded simultaneously with the formation of the DUAL ELASTOMER profile. This creates a completely unitized structure which will not deteriorate with repeated compressions. To order any of the profiles with this option, add an “SPG” suffix to the appropriate part number by following the instructions on page 14. For example, part number 2200-01-D50-GRA-NPS-SPL-1200 becomes 2200-01-SPG-GRA-NPS-SPL-1200. Standard stock items are available in the Tube and D-shape as follows. (part tables shown) * For ordering options, add the suffix nomenclature shown on page15. Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters --- ## 9 ## Ultra-Vanshield® RFI/EMI dual elastomer shielding gaskets **An asymmetrical P-shaped profile with interior serrations allows a very stable, large footprint to resist shear forces while offering extremely low compression force due to the hollow profile and the interior serrated top portion. Pressure sensitive adhesive tape installation.** **T-wiper** Functions through a very large deflection range with absolute minimum compression force. Excellent for large gaps and where mating surfaces vary along their length. Pressure sensitive adhesive tape installation; precision alignment to mounting surface due to high degree of longitudinal rigidity. **tadpole, high aspect ratio P-bulb** The center of pressure is located at a focal point where both the conductive outer layer and the pressure sensitive mounting tape receive full compression force when deflected. This assures optimum electrical contact and mounting adhesion without either breaking away during extreme deflection angles. **fluted-wall D-bulbs** **fluted-wall cove shape** (Part numbers and dimensions shown in tables.) * For ordering options, add the suffix nomenclature shown on page15. Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters --- ## 10 ## Microbridge® Microbridge® is the ultimate construction design utilizing new technology which creates a microscopic conductive bridge through the body of an elastomeric extruded gasket. The conductive element traces a path, by putting the conductor only where it is needed through the interior of the silicone rubber core, yielding very significant cost- effective savings of the conductive material. This leaves the outside face of the mounting surface side with as much adhesion-active area as possible and improved galvanic corrosion resistance with low compression/deflection forces. Excellent for I/O backplanes and all general RFI/EMI shielding applications. Available in most profiles in this catalog and many custom configurations. Be creative and utilize our design staff to help optimize your specific application. Standard tooled profiles are shown below; strips, D-bulbs and T-wiper styles. Custom layouts of the conductive traces and die-cutting are easily arranged (see also custom die-cuts below). **PART NUMBER HWT** (table shown) 38-125, 38-197, 38-250 Customs Consult Customer Service The versatility of the new Microbridge® technology permits an almost unlimited variety of custom modifications. From a simple sheet or strip configuration, die-cut conductive gaskets for I/O panels and similar applications are quickly and easily manufactured. Hand cut prototypes and short runs are practical with cost-effective minimal tooling. Microbridge® die-cut I/O panel gasket (part numbers shown) (Strip / ridge / D-bulbs / ridge / T-wiper / ridge diagrams shown) * Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters --- ## 11 ## D subminiature connectors Low compression-set silicone sponge core D connector shields for grounding and shielding of D subminiature connectors. Fits commonly used 9 pin through 50 pin layouts. Rear or front mount versatility. Adhesive mounting strips aid assembly. Custom shapes and designs available on a quick turnaround basis. Part No. Code: 7730 - XX - 030 - 9 (no. of pins; thickness; conductive outer layer options; see pg.15; part number) **O-rings** Conductive jointed rings made from the tube profiles shown above and on page 5. O.D. and I.D. cross section profile dimensions are the same as shown for the tube styles. To specify the exact dimensions and part number nomenclature for your application, please contact Customer Service. **semi-conductive carbon-loaded tubes & profiles** For economy applications; i.e., small aperture RFI/EMI gaskets and ESD grounding. Standard material options are shown below and other materials are available. Any profile in this catalog, or your proprietary design, may be ordered. For specific ordering nomenclature, consult Customer Service. Carbon Loaded Materials Available Volume Resistivity Ω-cm (list shown) **special purpose high performance EPDM tubes** AgEP Ethylene-Propylene-Diene-Monomer, EPDM, materials have long been proven in their excellence for demanding applications; i.e., resistance to aging, weathering, ozone, water, steam and chemicals including acids, alkalis and oxygenated solvents–overall it is the material of choice for various outdoor environments. Now, combined with the Ultra-Vanshield® coextrusion process, an even higher level of performance for RFI-EMI shielding is available. Construction consists of a versatile EPDM core covered with a conductive Silver/EPDM (AgEP) outer jacket. The combined result–abrasion resistance, silicone outgassing eliminated, even Phosgene gas does not deteriorate performance characteristics. Meets military NBC (Nuclear, Biological and Chemical) specifications. (part numbers shown in tables) * For ordering options, add the suffix nomenclature shown on page15. Recommended compression range is 10%-30% of relaxed height and no more than 50%. All dimensions in inches millimeters --- ## 12 ## 12 **MATERIAL PROPERTIES** TEST MATERIAL COMPOUND DESIGNATION DESCRIPTION | SPECIFICATION | VC3200 | VC3220 | VC3240 | VC3260 | VC3280 | VC3300 | VC3600 Suffix Vanguard -01 -02 -03 -04 -05 -08 -09 (see “ordering” on page 15) Conductive Matrix Pure Ag, AgCu, AgAl, AgNi, Ag Glass, Pure Ni, Low Resis-tivity Carbon in Silicone Elastomeric Support Matrix Vanguard Silicone (inner core) Shielding Effectiveness (dB) MIL-G-83528 Frequency: 200 KHz-H-field para. 4.6.12 | 65 | 65 | 60 | 65 | 55 | 65 | 50 100 KHz E-field | 120 | 110 | 110 | 100 | 90 | 75 | 75 500 MHz E-field | 120 | 110 | 100 | 100 | 90 | 100 | 75 2 GHz Plane wave | 110 | 100 | 95 | 95 | 90 | 95 | 70 10 GHz Plane wave | 110 | 100 | 90 | 95 | 90 | 110 | 65 Volume Resistivity (ohm-cm) ASTM D991 | .001 | .003 | .005 | .006 | .010 | .050 | .500 Surface Resistivity (ohm-Lin.in.) V.P.C method V908 | .150 | .300 | .400 | .500 | .750 | 2.00 | 10.0 Durometer (Shore A) ASTM D2240 | 50 | 50 | 50 | 50 | 50 | 55 | 70 Tensile Strength (p.s.i. ) ASTM D412 | 1,500 (listed for first six) | 1,200 Elongation (%) ASTM D412 | 320 (listed for first six) | 300 Tear Strength (p.p.i.) ASTM D624 | 120 (listed for first six) | 100 Compression Set (room temp.) 1,000 hrs.@72°F | 0% for all columns Compression Set (dry heat) 70 hrs.@300°F | 12% ... last column 10% Life Test 1,000 hrs.@275°F (vol. res. after heat aging) then 48 hrs.@340°F | .004 | .015 | .018 | .012 | .027 | .500 | .650 MIL-STD-202F Method 103B Humidity Test test condition No. 4 (vol. res. after steady-state exposure to moisture) 90-95%R.H. | .006 | .020 | .025 | .021 | .020 | .400 | .550 Each Ultra-Vanshield® shielding gasket profile shown in the preceeding product section is available with a wide selection of conductive outer jacket choices. To construct a discrete part number for your application, add one of the suffixes shown below after the part number, as described on page 15; for example, part number 1020, found on catalog page 5, with a standard Silver outer jacket is designated as part number 1020-01. --- ## 13 ## 13 **MATERIAL PROPERTIES** TEST MATERIAL COMPOUND DESIGNATION DESCRIPTION | SPECIFICATION | VC1851 | VC3400 | VC3450 | VC3500 | VC3205 | VC3210 | VC3650 Suffix Vanguard -10 -11 -12 -13 -15 -16 -17 (see “ordering” on page 15) Conductive Matrix Standard Pure Ag Pure Ag Pure Ag Abrasion- Resistant Darkened Carbon in Silicone, in Silicone, etc. (table values shown) Shielding Effectiveness (dB) MIL-G-83528 Frequency: 200 KHz-H-field para. 4.6.12 | 30 | 65 | 50 | 55 | 65 | 65 | 65 100 KHz E-field | 50 | 120 | 80 | 85 | 120 | 120 | 110 500 MHz E-field | 55 | 120 | 80 | 80 | 120 | 120 | 110 2 GHz Plane wave | 45 | 110 | 75 | 80 | 110 | 120 | 100 10 GHz Plane wave | 40 | 105 | 70 | 75 | 110 | 110 | 90 Volume Resistivity (ohm-cm) ASTM D991 | 4.00 | .002 | .050 | .100 | .002 | .001 | .005 Surface Resistivity (ohm-Lin.in.) V.P.C method V908 | 60.0 | .250 | 1.40 | 1.30 | .200 | .050 | .400 Durometer (Shore A) ASTM D2240 | 70 | 50 | 65 | 65 | 45 | 50 | 50 Tensile Strength (p.s.i. ) ASTM D412 | 875 | 1,200 | 950 | 1,800 | 1,300 | 1,500 | 1,500 Elongation (%) ASTM D412 | 240 | 250 | 210 | 220 | 230 | 320 | 320 Tear Strength (p.p.i.) ASTM D624 | 100 | 80 | 170 | 200 | 100 | 120 | 120 Compression Set (room temp.) 1,000 hrs.@72°F | 0% | 0% | 4% | 2% | 0% | 0% | 0% Compression Set (dry heat) 70 hrs.@300°F | 10% | 15% | 20% | 20% | 10% | 10% | 10% Life Test 1,000 hrs.@275°F (vol. res. after heat aging) then 48 hrs.@340°F | 6.00 | .005 | .220 | .190 | .004 | .002 | .008 MIL-STD-202F Method 103B Humidity Test test condition No. 4 (vol. res. after steady-state exposure to moisture) 90-95%R.H. | 4.50 | .005 | .300 | .200 | .005 | .004 | .016 Each production batch of Ultra-Vanshield® elastomeric compound is lot controlled for the specific mechanical and electrical characteristics shown. All test data is analyzed and kept on file to assure product consistency within a lot, and from lot-to-lot. --- ## 14 ## INSTALLATION Ultra-Vanshield® RFI-EMI shielding gaskets are manufactured from the most versatile, long-life materials to provide the highest performing alternatives for the life of your product. To take full advantage of the inherent properties of these materials, a few simple guidelines should be followed for the continued, long-term effectiveness of both the mechanical and electrical properties. 1. DETERMINE PROPER SIZE AND SHAPE The gasket’s “compressed configuration” is important to consider, regarding the width of the mounting area relative to the compressed width of the gasket. Consider various profiles and sizes, and mechanical stability required; such as, when the gasket must resist shear forces. 2. COMPRESSION RANGE REQUIRED Ultra-Vanshield® gaskets require only a minimum of deflection to achieve full shielding effectiveness. Conversely, since mating surfaces of an enclosure may vary in spacing along their length, consider the maximum separation distance to be connected by the gasket (see drawing at left). The gasket’s deflection should be between 10%-30% of its relaxed height, and not more than 50%. If too much compression is occurring, change to the next smaller size gasket. 3. ATTACHMENT METHODS Ultra-Vanshield® gaskets offer the widest range of attachment alternatives. The most common methods are shown at left. Standard Pressure sensitive adhesive, nonconductive Pressure sensitive adhesive, conductive Hardware (Dart/Groove press fit / Hardware) Gasket with integral clip (see "ULTRA-VANSHIELD Clip" on page 7 for available clip dimensions) 4. SHIELDING EFFECTIVENESS Shielding effectiveness is determined by the largest gap opening in an enclosure seam or aperture. This is known as the “slot length”. As “slot length” decreases, shielding effectiveness increases. Usually, the shielding gasket is continuous along the entire length of the opening. If a discontinuation is necessary; i.e., for hinges, locks, fasteners, etc., refer to page 4, figure 6, to calculate the expected shielding effectiveness according to the length of the discontinuation (or slot length). --- ## 15 ## ORDERING ### STANDARD PRODUCTS All shielding gaskets shown in this catalog are available with optional conductive outer layers and specific product treatments. To construct a discrete part number for your application, follow the guidelines below. Characteristic suffix descriptors are added to the desired part number found in the preceding product pages. Profile tolerances standard per RMA Class Sil A2. Closer tolerances available upon request. STATEMENT IN LIEU OF WARRANTY: The information herein is true to the best of our knowledge, and is based on data believed to be reliable. Vanguard Products Corporation, however, assumes no liability for product failure unless specifically stated in writing. There are no warranties, express or implied, of merchantability, fitness, or otherwise. Vanguard Products Corporation shall not be liable for any special, incidental, or consequential damages. No statement contained herein shall be construed as an inducement to infringe existing patents. Product testing by the purchaser is recommended to confirm expected results. Copyright © Vanguard Products Corporation 2002. PART NUMBER FROM CATALOG CONDUCTIVE OUTER LAYER •01 - Standard Silver (Ag) •02 - Silver Plated Copper (Ag/Cu) •03 - Silver Plated Aluminum (Ag/Al) •04 - Silver Plated Nickel (Ag/Ni) •05 - Silver Plated Glass Spheres (Ag/GL) •06 - Gold (Au) •07 - Copper (Cu) •08 - Nickel (Ni) •09 - Carbon, Low Resistivity (CL) •10 - Carbon, Standard (CS) •11 - Silver in Fluorosilicone (AgFK) •12 - Silver in EPDM (AgEP) •13 - Silver in Fluorocarbon (AgFC) •15 - Silver, Abrasion Resistant (AgX) •16 - Blackened Silver (Ag-Dk) •17 - Silver Aluminum (AgAl-Dk) •18 - Other * optional “Quick-Start” easy removal extended adhesive liner (ECPS& EPSA above) An extended pressure sensitive adhesive protective liner option is now available on all Ultra-Vanshield® RFI-EMI shielding gaskets. The extra wide tear-away liner protrudes outboard of the gasket body for easy and fast removal during installation. LENGTH • Standard - 1,200 Inches • Custom Length (in Inches) • For O-rings - Length = Circumference PACKAGING • SPL - Spooled on a Reel • CTL - Cut To Length • COI - Coiled Loosely • BND - O-Rings, bonded • FRM - Mitre-spliced window frame • SPEC - Special, Custom Finishing MOUNTING TAPE OR CLIP • NPS - No Pressure Sensitive Tape • PSA - Pressure Sensitive Tape (min. width 0.1”) • EPSA - Extended Pressure Sensitive Tape *(see below)* • CPS - Conductive Pressure Sensitive Tape • ECPS - Extended Conductive Pressure Sensitive Tape *(see below)* • DCPS - Double Coated Semi-Rigid Pressure Sensitive Tape for Stiffness Enhancement • CLP - Mounted Clip • SPEC - Special CORE MATERIAL • ORA - Orange (STD) • GRA - Gray • WHI - White • BLU - Blue • VIO - Violet • BLA - Black • RED - Red DUROMETER •D30 - 30 Shore A Durometer • D50 - 50 Shore A Durometer (Standard) • D75 - 75 Shore A Durometer • FR - Flame Resistant, 60 duro. (Brown Only) • SPG - Closed Cell Silicone Sponge • LOG - Low outgassing silicone Part# 1020-01-D50-BLU-NPS-SPL-1200 ENGINEERING TEST KIT An EMC test lab kit which is capable of immediate problem mitigation from the generous supply of each style included. There are 32 feet each of nine distinct part numbers, representing the most common styles for electronic enclosure gap ranges from 0.020” to 0.300”. Installation guidelines and further product information are included. 87 Newtown Road • Danbury, CT 06810, USA tel: 203-744-7265 fax: 203-798-2351 e-mail: info@vanguardproducts.com www.vanguardproducts.com --- ## 16 ## Van-Therm® heat conducting elastomer THERMAL RESISTANCE low high less more Compression Force (psi) THERMAL RESISTANCE low high low high SPECIFICATIONS AND PERFORMANCE Characteristic Measure Value Color Visual White Thermal Conductivity W/m-k 1.0 Dielectric Constant 1000 Hz 4.5 Continuous Use Temp. ˚F -100˚ to 400˚F Thermal Impedance @.187 thickness C-in2 /W 2.5 Volume Resistivity Ωcm 1.0 x 1014 Hardness Shore A 30 Tensile psi 500 Elongation % 250 Dimensions Available thickness .020” min ; 1.00” max 0,51 to 25,4 mm width .060” min ; 3.00” max 1,52 to 76,2mm length .060” min ; 3,00” max 1,52 to 76,2mm Van-Therm® is a highly efficient heat conducting interface material with wide application uses for electronic, electrical and electro-mechanical assemblies. Miniaturization and higher speed electronics demand efficient thermal management for reliable operation and long-term aging properties of all types of components. Space restrictions compound such considerations, and of course, cost containment is always a requirement. Van-Therm®’s efficient thermal conductivity and conformability accommodate most component surfaces and substrates. •Conforms to irregular surface depressions and protrusions for maximum surface contact, and therefore efficient thermal transfer. •Material consistency permits high levels of heat extraction from heat generating components to heat sinks, thermal bridges and chassis members. •Ideal durometer allows greater controllable compression squeeze enabling highest heat conduction per minimum cross sectional area of thickness. See charts at left. •Available in strips, sheets and die-cuts for universal applications and specific standard or custom dimensions. •Custom extruded profiles and shapes available. PART NUMBER* H W 70-124 .020 0,51 .125 3,18 70-125 .040 1,02 .125 3,18 70-250 .062 1,57 .250 6,35 70-315 .062 1,57 .250 6,35 70-501 .093 2,36 .500 12,70 70-502 .125 3,18 .500 12,70 70-000 .125 3,18 1.000 25,40 Customs Please consult Customer Service All dimensions in inches millimeters --- ## 17 ## customs and prototypes custom O-rings & seals Up to 120” (3 meters) I.D. in exacting tolerances. As small as .020” I.D. while still retaining resiliency and long-term effectiveness. custom extrusions Virtually any shape can be made. Let your imagination run wild! New tooling is easily and economically prepared. custom splices Spliced web gaskets in intricate layouts reduced to a simple cost-effective process through our splice design technology. custom molded parts Boots, grommets, elbows, bellows, valves, sheets and similar shapes. custom assemblies Set in place and bonded to polyester film or your mating components, mitred frames and special joints. custom die-cuts Standard gaskets notched or die-cut to fit irregular mounting surfaces, and in addition a variety of standard die-cut treatments are available from flat sheet stock. prototypes All items shown above in a wide range of materials. Fast turnaround on tooling. If you have special proprietary needs, this is the page for you. --- ## 18 ## Catalog #: 2002R4 www.vanguardproducts.com --- An EMC test lab kit which is capable of immediate problem mitigation from the generous supply of each style included. There are 32 feet each of nine distinct part numbers, representing the most common styles for electronic enclosure gap ranges from 0.020” to 0.300”. Installation guidelines and further product information are included. ENGINEERING TEST KIT Van-Therm Thickness THERMAL RESISTANCE low high ® less more Compression Force (psi) THERMAL RESISTANCE low high low high SPECIFICATIONS AND PERFORMANCE Characteristic Measure Value Color Visual White Thermal Conductivity W/m-k 1.0 Dielectric Constant 1000 Hz 4.5 Continuous Use Temp. ˚F -100˚ to 400˚F Thermal Impedance @.187 thickness C-in2 /W 2.5 Volume Resistivity Ωcm 1.0 x 1014 Hardness Shore A 30 Tensile psi 500 Elongation % 250 Dimensions Available thickness .020” min ; 1.00” max 0,51 to 25,4 mm width .060” min ; 3.00” max 1,52 to 76,2mm length .060” min ; 3.00” max 1,52 to 76,2mm Van-Therm® is a highly efficient heat conducting interface material with wide application uses for electronic, electrical and electro-mechanical assemblies. Miniaturization and higher speed electronics demand efficient thermal management for reliable operation and long-term aging properties of all types of components. Space restrictions compound such considerations, and of course, cost containment is always a requirement. Van-Therm® ’s efficient thermal conductivity and conformability accommodate most component surfaces and substrates. •Conforms to irregular surface depressions and protrusions for maximum surface contact, and therefore efficient thermal transfer. •Material consistency permits high levels of heat extraction from heat generating components to heat sinks, thermal bridges and chassis members. •Ideal durometer allows greater controllable compression squeeze enabling highest heat conduction per minimum cross sectional area of thickness. See charts at left. •Available in strips, sheets and die-cuts for universal applications and specific standard or custom dimensions. •Custom extruded profiles and shapes available. PART NUMBER* H W 70-124 .020 0,51 .125 3,18 70-125 .040 1,02 .125 3,18 70-250 .062 1,57 .250 6,35 70-315 .062 1,57 .250 6,35 70-501 .093 2,36 .500 12,70 70-502 .125 3,18 .500 12,70 70-000 .125 3,18 1.000 25,40 Customs Please consult Customer Service All dimensions in inches millimeters custom O-rings & seals Up to 120” (3 meters) I.D. in exacting tolerances. As small as .020” I.D. while still retaining resiliency and long-term effectiveness. custom extrusions Virtually any shape can be made. Let your imagination run wild! New tooling is easily and economically prepared. custom splices Spliced web gaskets in intricate layouts reduced to a simple cost-effective process through our splice design technology. custom molded parts Boots, grommets, elbows, bellows, valves, sheets and similar shapes. custom assemblies Set in place and bonded to polyester film or your mating components, mitred frames and special joints. custom die-cuts Standard gaskets notched or die-cut to fit irregular mounting surfaces, and in addition a variety of standard die-cut treatments are available from flat sheet stock. prototypes All items shown above in a wide range of materials. Fast turnaround on tooling. If you have special proprietary needs, this is the page for you. 17 Ultra-Vanshield® RFI/EMI dual elastomer shielding gaskets Catalog #: 2002R4 www.vanguardproducts.com