Buy Barber Coleman Valve Actuator

Barber-Coleman company delivers unsurpassed performance in high-quality, reliable Barber Coleman actuators for industrial applications. For over thirty-five years, Barber-Colman Control Company has been a premier supplier of superior actuators for all sorts of HVAC or heating, ventilation and air-conditioning uses.

Valve actuators mount on valves and, in response to a signal, move a valve to a desired position using an external power source.

There are several basic types of valve actuators:-

• Manual valve actuators
  Manual valve actuators uses handwheel or lever to drive a series of gears whose ratio results in a higher output torque compared to the input (manual) torque and do not require external source of power.

• Electric valve actuators
  Unlike manual valve actuators, electric valve actuators use a three-phase or a single-phase AC or DC motor to drive a combination of gears to generate the desired torque level.

• Pneumatic valve actuators
  These actuators convert air pressure into rotary or linear motion to adjust valve position. Similarly, electro hydraulic valve actuators and hydraulic valve actuators convert fluid pressure supply into linear or rotary motion.

Some important specifications to consider when selecting valve actuators are Valve motion and operation style. Rotary motion valves (rotary valves) such as ball, plug, and butterfly valves rotate a quarter-turn or more from open to close.

Linear motion valves (linear valves) such as gate, globe, diaphragm, pinch and angle-style valves have a sliding stem design that pushes the closure element open or closed. The valve stem may rise during rotation, or may rise without rotation. There are two basic operating styles for valve actuators - On/off or isolating devices limit actuator motion to preset or open and closed positions. Modulating devices provide controllable motion so that valves can be throttled as necessary.

Typical specifications for valve actuators include voltage, supply pressure, control signal input type, valve stem diameter,actuation time, fail-safe method, location type, and operating temperature. The input pressure needed to achieve a desired torque or thrust output is called the Supply pressure. Companies specify air supply pressure for pneumatic actuators and fluid supply pressure for hydraulic actuators.

Valve actuators also have some fail safe techniques. In case of power failure, or in case of loss of control signal,devices can open or close valves. Valve actuators are also designed accordingly for hazardous environments which contain combustible or explosive mixtures.

Barber Coleman manufactures a wide variety of linear actuators for its VB-7000, VB-8000, and VB-9000 series of globe valves. In addition, these actuators are perfect retrofits for a number of competitor's globe valve actuators.

Electric linear actuators provide linear motion via a motor-driven ball screw,acme screw assembly or lead screw. The load is attached to the end of the screw and is unsupported.

Acme screws are lead screws with matching threads on both the screw and nut. Ball screws are lead screw and ball nut combinations that enable the balls in the nut to circulate when the actuator is in motion.
Electric linear actuators vary in terms of motor type, power, and features. Electric linear actuators with belt drives, geared drives, and direct drives are also available. The motor is connected directly to the electric linear actuator for direct drives. One of the important specification for valve actuators is the system backlash Backlash is the position error due to directional change.

Other types of actuators available from Barber Coleman are :

• Spring Return Actuators:
  
  • Round Hydraulic MX-5000 20lbf
  • Linear DuraDrive MX51-710X 105lbf
  • Linear DuraDrive MX51-720X, MX61-720X 220 lbf
• Non-Spring Return Actuators:
  
  • Barber-Colman MX-20000 45 lbf, floating and proportional electric
  • Barber-Colman MX-60000 220 lbf, floating and proportional electric

Barber Coleman company also offers a wide variety of Barber Colman controls, Barber Coleman company sensors, Barber Colman motors, Barber Coleman thermostats, indicators, Barber Coleman valves, alarms, and other Barber Coleman parts that are essential in the areas of building control, home control, and water control products.