ISO5211 mounting flange allows for easy actuation
17-4PH SS blow-out proof shafts
A395 ductile iron body
Bubble tight and bi-directional up to 250 PSI
Cartridge seat with phenolic backing seat provides dimensionally stable seating surface, minimal seat wear and extends seat life
Two molded in primary shaft seals on upper and lower seal bore I.D.
Three additional shaft seals
Two upper and one lower F4 bushing to provide additional support
Set screws to maintain seat alignment on dead-end service

Resources:

Technical literature