GRF Butterfly valve

Features:

Double flanged body design with face-to-face dimensions, according to EN 558 Series 20, API 609 and AWWA C504 short.

Designed according to EN 593 and API 609.

The seat is field replaceable and fully isolates the body and shaft from the flow.

Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.

A secondary shaft sealing provides back-up safety.

A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.

Shaft seals prevent moisture penetrating into the shaft area.

Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.

Extended body neck allows for pipe insulation.

Top and bottom shaft bearings for optimized support and minimum friction and decreased torque.

Top bushing absorbs actuator side thrust loads.

All valves comply to Pressure Equipment Directive (97/23/EU) Module B1 + D, CE Marking.

Specifications:

Certifications ABS, American Bureau of Shipping Shipboard, PED

Application Wastewater collection, Water Treatment, Water distribution, Plant Air, Wastewater treatment, Chillers , Air Circulation

Body Design Short Pattern

Material Ductile Iron, Epdm Rubber, Carbon Steel, Buna-N, 316 Stainless Steel

Operating Temperature Up to 250 F (120 C)

Pressure Class PN, ASME

Process Connection Type CL150RF, 150FF, 125FF

Seat/Seal Type Resilient

Shutoff Class Zero Leakage

Standards API 609, ASME B16.34

Valve Size NPS 60, NPS 56, NPS 48, NPS 44, NPS 42, NPS 40, NPS 36, NPS 30, NPS 24 / DN 600

Valve Size Standard NPS, DN

Valve Type Butterfly

Media Air, Inert Gas, Air, Hot Water, Liquid, Water, Liquids