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GRW/GRL RESILIENT SEATED BUTTERFLY VALVES
KEYSTONE SERIES

GRW/GRL RESILIENT SEATED BUTTERFLY VALVES

The Keystone Series GR is a general purpose resilient seated butterfly valve available in flanged, lugged or wafer body style complete with manual actuator, configurable as a handle or gear operator. With a pressure rating up to 230 PSI, this valve is the leader in performance. We offer an optional EPDM seat with a 300° F rating. These valves are available in 2”-36” sizes, in both wafer and lug designs.

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Keystone Family of Products

Control Valves

High Performance Butterfly Valves

Keystone Series HiLok High Performance Butterfly Valves
Emerson
High Performance Butterfly Valves
Keystone Series HiLok High Performance Butterfly Valves
Keystone WINN Hi-Seal High Performance Butterfly Valve
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High Performance Butterfly Valves
Keystone WINN Hi-Seal High Performance Butterfly Valve
Keystone K-LOK Series H High Performance Butterfly Valve
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High Performance Butterfly Valves
Keystone K-LOK Series H High Performance Butterfly Valve
Keystone Figure 310/312 High Performance Butterfly Valve
Emerson
High Performance Butterfly Valves
Keystone Figure 310/312 High Performance Butterfly Valve

Butterfly Valves

Keystone Series GRW/GRL Butterfly Valves (ISO)
Emerson
Butterfly Valves
Keystone Series GRW/GRL Butterfly Valves (ISO)
Keystone Series 221/222 Butterfly Valves
Emerson
Butterfly Valves
Keystone Series 221/222 Butterfly Valves
Keystone Series GRW/GRL Butterfly Valves
Emerson
Butterfly Valves
Keystone Series GRW/GRL Butterfly Valves
Keystone Figure 990/920 Butterfly Valves
Emerson
Butterfly Valves
Keystone Figure 990/920 Butterfly Valves

Quarter-turn Actuators

Keystone F89 Pneumatic Quarter-turn Actuator
Emerson
Quarter-turn Actuators
Keystone F89 Pneumatic Quarter-turn Actuator
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Series 221/222
KEYSTONE
Series 221/222
  • An economical bonded resilient seated Butterfly valve for bi-directional and end-of-line service available in both Wafer style valve and Lugged style valves. 
  • Ideal for building services and irrigation applications that require shut-off control. The valve has a moulded in seat and can be used in full vacuum service.
  • We offer 2”-12” sizes in lug and wafer designs with various seat and disc options. Our bi-directional dead-end capability, up to 250 PSI, makes this design a preferred general utility option.
K-LOK HIGH PERFORMANCE BUTTERFLY VALVES
KEYSTONE SERIES 36 AND 37
K-LOK HIGH PERFORMANCE BUTTERFLY VALVES
  • Double offset disc/shaft
    • K-LOK’s unique two-piece shaft and doubleoffset disc/shaft design allows for high cycling and creates a lower disc profile with
  • Adjustable shaft packaging (polymer seated valves)
    • The K-LOK’s unique shaft packing is composed of 3 rings of braided PTFE rope between one PTFE V-ring at the top and bottom. The packing operates on an interference fit with the body and therefore will seal in pressure and vacuum.
  • Two-piece shaft vs. one-piece shaft
    • K-LOK’s disc geometry maximizes flow capacity by increasing the available flow area through the valve. This increase in disc efficiency results in a higher valve Cv.