Page 294 - Peter Paul 2019 Catalog

SEAL MATERIAL
EPDM Seals
High Pressure Gas Applications
Special EPDM (Ethylene Propylene Diene Monomers) seals are used where high-pressured gases tend to be absorbed in standard rubber seals. When gas is absorbed into a rubber solenoid valve seal it will cause the rubber to display a phenomenon called explosive decompression. If the system is vented or pressured reduce, gas that is trapped inside will cause the seal to balloon and swell, sometimes fracturing.
Used in place of conventional seal materials, such as urethanes, EPDM is more suitable for high pressured gases used in aerospace projects.
FKM Seals
For Gasoline And Propane Valve Applications
FKM solenoid valve seals are used for powered-vehicles and reformulated gasoline applications where solenoid valve seal swelling, cracking, and decomposition are occurring over time. This has created the need to reformulate existing FKM compounds to maximize their properties in reformulated gasolines with up to 15% MTBE and alcohol.
By maximizing the fluorine content of the FKM seals, swell is reduced. Further enhancement of the physical properties is made by removing the traditional colorant and adding carbon black. Beyond vehicular applications other related uses, particularly the medical field, have shown to be more stable and long-lasting when the FKM is applied.
Added Moisture Protection Available for Series 50 Explosion-Proof Solenoid Valves Extreme Weather Conditions
Our Series 50 explosion-proof solenoid valves and operators with molded coil for hazardous locations are offered with added protection from moisture in the form of O-rings and flat gasket fluorocarbon elasometer seals. These added seals will provide a solenoid valve at lower cost than one with a fully potted coil, top and bottom seal, and an RTV conduit seal.
Explosion-Proof Solenoid Valves are offered in several designs, based
on maximum operating pressure differential, orifice size, CV factor, and operating media. These valves operate in hot water, steam, gasoline, oil, refrigerant, hydraulic fluid, and other environments requiring special seal materials. This design with 1/8” NPT allows these valves to meet the requirements hazardous locations, Class 1 Group C and D, and
Class II Group E, F, and G.
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