Other Keystone Equipment

Keystone 257 Stainless Steel Vertical Actuator


The Keystone 257 is a Stainless Steel Vertical Actuator which uses pneumatic quarter turn operation.


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Please contact us for more information.


Keystone technology
Fast and reliable quarter turn operation makes it suitable for use with Butterfly, Ball and Plug Valves
Only one external air supply line is required with our internally air ported actuator, when used with the Keystone control head
Constructed from corrosion resistant materials
Designed with an optimized piston helix to provide maximum torque output
Double acting or spring return models available
Fully contained spring module, to help ensure safety to maintenance personnel
Maintenance friendly
Site repairable
Modular bridge clamp mounting for easy actuator change-out.
Air supply:
Double acting (DA
300 kPa (3 bar) to 800 kPa (8 bar) max.
Spring return (SR)
550 kPa (5.5 bar) to 800 kPa (8 bar) max.