Control valves - Instrumentation supply solution

What Is a Control Valve?

Control valves direct flowing gas, steam, water & chemical compounds to compensate for load disturbance and regulate process variables as close as possible to desired set points. Explore our control valve portfolio for designs tested for maximum efficiency and compliance with industry standards.

Globe Valve

A throttling globe valve uses a linear motion to move a closure member into and out of a seating surface. They have a body distinguished by a globular-shaped cavity around the port region and are designed to regulate process flow when used in conjunction with an actuator assembly. Many single-seated valve bodies use cage or retainer-style construction to retain the seat-ring, provide valve plug guiding, and provide a means for establishing particular valve flow characteristics. Cage or retainer-style single-seated valve bodies can also be easily modified by change of trim parts to change the flow characteristic or provide reduced-capacity flow, noise attenuation, or reduction or elimination of cavitation.

Segmented Ball Valve

A segmented ball valve is similar to a conventional ball valve, but with a contoured V-notch segment in the ball. This control valve has good rangeability, control, and shutoff capability. The V-notch ball provides positive shearing action and produces an inherent equal percentage flow characteristic. It provides non-clogging, high capacity flow control. The V-notch ball has been specially contoured to maximize capacity and enhance seal life and shutoff integrity.

ball valves

ball valve consists of a valve body with a rotatable ball to control flow. A ball valve as a throttling control device ideally uses a full port (full bore) or reduced port (reduced bore) mechanism. A port or bore is a cylindrical flow passage through the center of the ball, and when turned one-quarter of the way, the flow stops. The port of a full port or full bore ball valve equals the pipeline diameter and presents little or no restriction to flow to allow for pigging when not attenuated. The port of reduced port or reduced bore ball valve is smaller than the pipe to absorb a small amount of pressure drop.

Butterfly valves

Butterfly valves are a type of rotary valve that use a rotating disk to control flow through a pipe. The disk is generally operable through 90 degrees and provides a linear flow characteristic. For throttling control applications, one type of butterfly valve is now the industry standard: high performance butterfly valves (HPBVs) or double offset valves. Their advantages include a straight-through flow path, very high capacity, and ability to pass solids and viscous media.

Angle Valve

A globe valve design in which the inlet and outlet ports are perpendicular to each other. It uses a linear motion to move a closure member into and out of a seating surface. Angle valves are commonly used in boiler feedwater and heater drain service and in piping schemes where space is at a premium and the valve can also serve as an elbow. The valve can have cage-style construction or expanded outlet connections, restricted trim, or outlet liners for reduction of erosion, flashing, or cavitation damage.

Three-Way Valve

A type of globe valve that has three pipeline connections to provide general converging (flow-mixing) or diverging (flowsplitting) service. Variations include cage-, port-, and stemguided designs, selected for high-temperature service, and end connections can be specified to mate with most piping schemes. Actuator selection demands careful consideration, particularly for constructions with an unbalanced valve plug.

Eccentric plug valve

A style of rotary control valve with a plug-shaped, flow-restricting member that follows an eccentric path as it rotates. The plug has no contact with its seat until it turns within a few degrees of the shutoff position. As the plug contacts or “cams” into the seat, the seating surfaces dynamically align to achieve shutoff. This valve type can also be referred to as rotary globe.