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Standard Materials of Construction
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Body
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ASTM A216 WCB/WCC Cast Carbon Steel Hard Chrome Plated
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Plug
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ASTM A216 WCB/WCC Cast Carbon Steel, Electroless Nickel Plated*
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Bonnet & Lower Plate
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ASTM A216 WCB/WCC Cast Carbon Steel
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Slips
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ASTM A536-80-55-00 ductile iron
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Seals
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Viton and other materials available to meet special requirements
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Packing Gland
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17-4 Stainless Steel
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DURA SEAL TRIM SELECTION CHART
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Fluoro Elastomers Slip Seal Materials : -10 to +450 degrees F
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V
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Viton
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FV Standard Seal**
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V-90
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Viton 90 Durometer
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Standard HiDp
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V-FRV
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Fiber Reinforced Viton
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Optional HiDp
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VGF
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Viton GF
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Viton with enhanced chemical resistance
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V-E
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Viton Extreme
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Excellent resistance to chemicals and fluids
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Nitrile Elastomers Slip Seal Materials : -75 to +250 degrees F
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NT-S
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Nitrile
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Standard Nitrile Material
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FVM
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Modified Nitrile
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For Reformulated Gasoline Seal Material
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NT-LT
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Nitrile low temp
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Low Temp Applications
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Special Applications Slip Seal Materials
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EPR
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Ethylene-propylene
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Ammonia-but not hydrocarbon: 65 to +300 degrees F
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EC
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Epichlorohydrin
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Good Low Temp Material : 65 to +250 degrees F
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* Contact factory for special applications
**Franklin Valve Standard Slip Seal Material is Viton. For non-standard seal material-consult factory.
Other slip seal materials, not shown-consult factory.
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