Pneumatic Actuators

A pneumatic actuator converts energy (typically in the form of compressed air) into mechanical motion through high stem force output for demanding service conditions. The motion can be rotary or linear, depending on the type of actuator. These actuators are usually air operated but some can be self-operated by the process fluid.

• Pneumatic Scotch Yoke Valve Actuator
• Pneumatic Rack and Pinion Valve Actuator
• Pneumatic Linear Actuator

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Hydraulic Actuators

A hydraulic actuator consists of a cylinder or fluid motor that uses hydraulic power to facilitate mechanical operation. The mechanical motion gives an output in terms of linear, rotary or oscillatory motion. Because liquids are nearly impossible to compress, a hydraulic actuator can exert considerable force. The hydraulic cylinder consists of a hollow cylindrical tube along which a piston can slide. The term single acting is used when the fluid pressure is applied to just one side of the piston. The piston can move in only one direction, a spring being frequently used to give the piston a return stroke. The term double acting is used when pressure is applied on each side of the piston; any difference in pressure between the two sides of the piston moves the piston to one side or the other.

• Hydraulic Helical Valve Actuator
• Electro-Hydraulic Operator Actuator
• Hydraulic Scotch-Yoke Valve Actuators
• Gas Hydraulic or High-Pressure Pipeline Pneumatic Valve Actuators
• Hydraulic Emergency Shutdown System
• Hydraulic Wellhead Protection
• Subsea Actuator 

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Electric Actuators

An electric actuator provides a stem force output for a variety of process applications by using electricity as the power source. The motion can be rotary or linear, depending on the type of actuator. These actuators are usually air operated but some can be self-operated by the process fluid.

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Multiport Flow Selectors

The Bettis Multiport Flow Selector allows the diversion of fluids from a single flow line to a test outlet or a sampling device. A single Multiport Flow Selector can manifold as many as eight flow lines through it simultaneously. While the one outlet is isolated, the flow from the other seven is combined into a separate group outlet. This unique flow selector can be used in a variety of oil and gas or process applications.

Typical Applications

• Test separators
• Offshore skid packages

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