Series 50-52 Resilient Seated Butterfly Valve

Resilient seated butterfly valve in wafer (Series 50) or lug (Series 52) pattern, with Series 5A wafer and 5B lug versions for an alternate stem size. Sized 2" to 24" (DN 50 to 600), rated Class 125, 175 PSIG (PN 12) to 12" and 150 psi (PN 10) from 14" to 24". A one piece stem with an internal Double D drive eliminates disc pins and screws, and the top plate is double drilled to ISO 5211 and a standard secondary bolt circle.

Body style

Series 50: Wafer; Series 52: Lug; Series 5A: Wafer (alternate stem size); Series 5B: Lug (alternate stem size)

Body

CI, DI, CS

Disc

Nylon coated Ductile Iron, Aroxy Ductile Iron, CF8M

Stem

410 SS, 17-4 PH

Seat

EPDM, White EPDM, Buna-N, White Buna-N, FKM, Silicone

Size range

2" to 24" (DN 50 to 600)

Pressure rating

2" to 12": Class 125, 175 PSIG (PN 12); 14" to 24": 150 psi (PN 10); optional 2" to 24": 230 (PN 16)

Design standard

API 609, BS EN 593

Testing standard

API 598, BS EN 12266-1

Features

Top plate double drilled to ISO 5211 and standard secondary bolt circle dimensions designed for direct mounting of a wide range of actuators, handles, and gears; heavy duty acetal bushing; high strength disc with hand polished disc edge and hubs; one piece stem with internal Double D drive eliminates disc pins and screws; blowout proof stem retention offers easy assembly and disassembly