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What is the Difference Between Choke Valve and Speed Control Valve?

Nov. 10, 2020
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As a Wellhead Equipment Manufacturers, share with you.

The difference between choke valve and speed control valve:

1. Choke valve is to adjust and control the size of the opening in the valve to directly limit the flow of fluid through to achieve the purpose of throttling. Due to the forced throttling, there will be a large pressure difference before and after throttling, and the pressure loss of the controlled fluid will be relatively large, that is to say, the pressure after throttling will decrease.

2. The speed control valve is based on the throttling principle of the throttling valve, and a pressure compensation device is added to the internal structure of the valve to improve the phenomenon of large pressure loss after throttling, and make the pressure of the fluid after throttling basic The upper pressure is equal to the pressure before throttling and reduces the heat of the fluid.

Choke Valve Wellhead

Choke Valve Wellhead

1. Nature

Choke valve: A valve that controls fluid flow by changing the choke section or choke length. Connecting the choke valve and the one-way valve in parallel can be combined into a one-way choke valve.

Speed control valve: It is a combination valve composed of a fixed differential pressure reducing valve and a choke valve in series.

2. Features

Choke valve: relatively simple structure, easy to manufacture and maintain, low cost; adjustment accuracy is not high, can not be used for adjustment; sealing surface is easy to erosion, can not be used as a cutting medium; poor sealing.

Speed control valve: Based on the throttling principle of the choke valve, a pressure compensation device is added to the internal structure of the valve to improve the phenomenon of large pressure loss after throttling, and make the pressure of the fluid after throttling basically equal The pressure before throttling, and reduce fluid heat. 

3. Application

Choke valve: Since the flow rate of the choke valve is not only dependent on the size of the choke orifice, but also related to the pressure difference before and after the orifice, the rigidity of the valve is small, so it is only suitable for small changes in the load of the actuator and speed stability Less demanding occasions.

Speed control valve: general speed control valve does not have temperature compensation, and can be used on machine tools, power head slides and similar equipment; another type with temperature compensation device changes the rotary spool into a spool valve spool with a thin blade structure To reduce the influence of temperature on flow.

Our company also has Wellhead Choke Valve on sale, please contact us.


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