Keystone Series GRW/GRL Butterfly Valves (ISO)

A heavy duty industrial resilient seated Butterfly valve

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Description

Specifications

Certifications
ABS, PED, DVWG, CUTR, CRN
End Connection
Wafer, Lugged
Application
Cruise Ship, Cooling Water , Compressors , Air Circulation, Facilities & Process Utilities
Material
Super Duplex, 316 Stainless Steel, Aluminum Bronze, Buna-N, Ductile Iron, Duplex, Epdm Rubber, Nylon
Operating Temperature
Less than 150 C
Pressure Class
PN, ASME
Process Connection Type
PN16, 150RF
Seat/Seal Type
Resilient
Shutoff Class
Zero Leakage
Standards
ASME B16.34, API 609
Valve Size
5 inch, NPS 10 / DN 250, NPS 12 / DN 300, NPS 14 / DN 350, NPS 18 / DN 450, NPS 2 / DN 50, NPS 20 / DN 500, NPS 2-1/2 / DN 65, NPS 24 / DN 600, NPS 3 / DN 80, NPS 30, NPS 36, NPS 4 / DN 100, NPS 6 / DN 150, NPS 8 / DN 200, NPS 16 / DN 400
Valve Size Standard
NPS, DN
Valve Type
Butterfly
Media
Water Glycol, Water, Liquid, Air
Stem
O-ring

Features

  • Wafer and lugged body design with face-to-face dimension, according to EN 558 Series 20 and API 609.
  • 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.
  • The two piece shaft allows for a thin disc and provides minimal obstruction to flow (up to DN 300).
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.
  • Body locating holes allow ease of installation and centering between the flanges.
  • Extended body neck allows for pipe insulation.
  • Actuator flange according to ISO 5211.

Brand

Keystone

Long Lasting Butterfly Valves with a Sturdy Reputation

Emerson’s Keystone offer a complete range of butterfly valves from general purpose through to heavy duty and high performance models. With a tradition of more than 70 years, Keystone built its reputation on providing industrial process butterfly valves known for their reliability, long service life, and reduced operating costs. Independent, third-party life-cycle testing has shown that Keystone resilient-seated butterfly valves last 2.5 times longer than competitors' butterfly valves.  
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