Valve Actuators
Supplying you with pneumatic, electric, thermostatic and manual actuators.
Keystone supplies a variety of valve actuators in different styles (pneumatic, electric, thermostatic and manual) from multiple manufacturers. Actuators attach to control valves.
Please contact us for price and availability.
Information for Quotes
In order to quote you on valve actuators, please supply us with as much of the following information as possible. Feel free to contact us directly for help.
- Do you have a specific make and model of actuator in mind? If so, which one
- What is the make, model and size of valve you are trying to actuate?
- What is the valve application? (fluid, operating pressure, operating temperature)
- What is the actuator configuration required? (normally-open, normally-closed, double-acting for quarter turn, etc.)
- If a diaphragm-type actuator, do you have a required diameter?
- If a quarter-turn actuator, do you have a required torque range?
- What is the pneumatic spring range required?
- Are any positioners or other accessories required? If so, which?
- Do you have a specific make and model of actuator in mind? If so, which one?
- What is the make, model and size of valve you are trying to actuate?
- What is the valve application? (fluid, operating pressure, operating temperature)
- What is the actuator configuration required? (normally-open, normally-closed, non-spring-return, etc.)
- If a quarter-turn actuator, do you have a required torque range?
- What is the operating voltage required?
- What is the signal voltage required?
- How many wires do you need for operating/control purposes?
- Are any positioners or other accessories required? If so, which?
- Do you have a specific make and model of actuator in mind? If so, which one?
- What is the make, model and size of valve you are trying to actuate?
- What is the valve application? (fluid, operating pressure, operating temperature)
- What mounting style are you looking for? (combined valve-mounted dial & sensor, valve-mounted dial & remote sensor, combined remote dial & sensor on 1 wire, separate remote dial & sensor on 2 wires, etc.)
- Are any tamper-proof options required?
- Do you have a specific make and model of actuator in mind? If so, which one?
- What is the make, model and size of valve you are trying to actuate?
- What is the valve application? (fluid, operating pressure, operating temperature)
- Do you require any chain wheels or other accessories with this actuator? If so, which?
Pneumatic Actuators
Pneumatic Actuators operate valves using a mechanism that converts the power of compressed air into either rotational motion (for quarter-turn applications like ball or butterfly valves) or vertical motion (gate or globe valves). These actuators can be used with positioners and other accessories to fine tune the control of the valve (among other things). Pneumatic actuators are common for steam zone valve applications because of their general resilience against heat.
Contact us for pricing and availability on various makes and styles, or for more information.
Electric Actuators
Electric Actuators use electric motors to generate either rotational or vertical motion in order to operate valves. They come in a range of operating voltages, fail-modes (fail-open, fail-closed, fail-last-position, etc.), signal ranges, and wiring configurations. Electric actuators work well in both open-close and modulating applications, though for certain higher temperature applications they may require adapters due to radiant heat concerns.
Contact us for pricing and availability on various makes and styles, or for more information.
Thermostatic Actuators
Thermostatic actuators are often used on globe-type radiator valves. They work using a temperature-sensitive medium that expands or contracts, thereby closing or opening the valve until the desired temperature is reached. These actuators come in several configurations of dial and temperature sensor location, including tamper-resistant versions.
NOTE: Wherever possible, please avoid having a “combined dial & sensor” actuator positioned on a valve where the heat will radiate directly up into the actuator. This makes the actuator think it is warmer in the space than it actually is, and will cause it to close the valve prematurely.
Contact us for pricing and availability on various makes and styles, or for more information.
Manual Actuators
Manual Actuators are the simplest way of operating a valve, using handles, wheels, or dials to open the close a valve without any automation at all. For larger valves, hand-operated wheels (for up-down motion) and gear-operated wheels (for quarter-turn motion) are used, sometimes with chain wheel accessories for hard-to-reach situations.
Contact us for pricing and availability on various makes and styles, or for more information.
Contact Us
Do you still have questions? Are you looking for pricing information or to place an order?
Do you have questions about valve actuators?
Can you change actuator types on a valve without having to change the valve, such as pneumatic to electric or thermostatic to manual?
It can be possible to change actuator types, provided that you know enough about your requirements and what is in place. Please also note that not all manufacturers support all actuator types, so you may have to change valves in order to get a specific configuration.
Can you get new actuators for old/discontinued valves that otherwise work fine?
We often help people do exactly that, but a lot of that depends on the information available including the make and model of the valve involved and what kind of actuation you need. Also, sometimes the ability to get new actuators for old valves depends on the availability of stem adaptors, so the valve and actuator can pair up properly.
Can you change a diaphragm-style pneumatic actuator to accommodate a different spring range without needing to change anything else?
Most often, yes! It is often just a matter of getting a spring change kit, provided that the range you want is within the options offered by the manufacturer.