4IN DUCTILE IRON KEYSTONE BUTTERFLY VLVE

Description

4 inch Keystone Series GRW Butterfly Valves heavy duty industrial resilient seated Wafer body design

Features Tech Specs

A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets
Extended body neck allows for pipe insulation
Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere
The seat is field replaceable and fully isolates the body and shaft from the flow
A secondary shaft sealing provides back-up safety
Body locating holes allow ease of installation and centering between the flanges
Designed according to EN 593 and API 610
Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off
Shaft seals prevent moisture penetrating into the shaft area
The two piece shaft allows for a thin disc and provides minimal obstruction to flow (up to DN 300/ NPS 12)
Top and bottom shaft bearings for optimized support and minimum friction and decreased torque
Wafer body design with face-to-face dimension, according to EN 558 Series 20 and API 610

Application	Air Circulation, Balance of Plant, Bulk Storage, Bulk Conversion Other, Compressors , Conveyors, Cooling Water , Cruise Ship, Facilities & Process Utilities, Blowers
Certifications	ABS, CRN, CUTR, PED, SIL capable
End Connection	Wafer
Material	Ductile Iron, Duplex, Epdm Rubber, Monel, Nylon, Super Duplex, 316L Stainless Steel, 316 Stainless Steel, 304 Stainless Steel, Buna-N, Aluminum Bronze
Operating Temperature	Less than 150 C
Pressure Class	PN, ASME
Process Connection Type	150RF, PN16
Seat/Seal Type	Resilient
Shutoff Class	Zero Leakage
Standards	Valve Size