FEATURES

ISO 5211 top plate for direct mounting of a wide range of actuators, handles, and gears
High strength disc with polished edge and hubs
Upper and lower stem with Square or double-D drive eliminates the need for disc screws or taper pins
Double molded O-rings provide upper and lower secondary seals

Heavy duty bushing absorbs forces acting on disc-stem assembly due to line pressure
“Bear-G” bearings on drive and non-drive end stem reduce friction and isolate stem from valve body
Bi-directional U-cup stem seal

Resilient Seated Butterfly Valves

Series 56/57

Resilient Seated for Higher Pressure

Product Series: 56/57
Size range: 2" to 48“ (DN 50 to 1200)
Pressure Rating: 2" to 24" - 285 PSIG (PN 20), 26" to 48" - 230 PSIG (PN 16)
Design Standards: API 609, BS EN 593
Testing Standard: API 598, BS EN 12266-1
Body Style: Series 56 - Wafer, Series 57 - Lug
Body Material: (CI/DI/CS - CI ASTM A126 Class B, CI IS 210 FG 260, DI ASTM A395 60-40-18, ASTM A216 WCВ), (SS - ASTM A351, CF8/CF8M/CF3M)
Disc Material: Nylon coated Ductile Iron, Aroxy Ductile Iron, CF8M, NAB
Stem Material: 410 SS, 17-4 PH, 316 SS
Seat Material: EPDM, Buna-N, FKM
Seal Material: NBR (BUNA-N)