The principal difference between the nature of the flow of gas and the flow of liquid through control valves is that liquids are incompressible, and gasses are compressible.

Parker flow control valves are designed to regulate the flow rate and pressure of media through a pipeline. Flow control valves are essential for optimising system performance and relying on a flow passage or port with a variable flow area.

select the correct valve for a flow application. The Cv was designed for use with liquid flows, it expresses the flow in gallons per minute of 60º F water with a pressure drop across the valve of 1 psi. However, this same Cv value can be used to determine gas flows through a valve.

The flow of gas and steam through control valves has been well defined by universal, standardized sizing equations (ISA/IEC). The first half of this chapter is dedicated to giving a description of these equations and the basic fluid mechanics involved in gas or steam flow through control valves.

What are Gas Control Valves? Maintaining a smooth and safe flow of materials through pipelines is paramount in the oil and gas industry. Gas control valves are vital in regulating the flow of oil, refined products, natural gas, and other substances.

Gas valves are flow control devices used to handle and control the flow of gases such as liquefied petroleum, oxygen, and sour and natural gas. They are available in a variety of metal or plastic materials that are compatible with the media controlled and pressure requirements.

control for on/off partial flow control over a wide range of flow rates from 0 to 50 sccm up to 1000 slpm and pressures up to 5000 psig (345 barg) with our ValFlex™ high-pressure control valve. It provides fast-response to control signal changes and operates over a …

2021年10月20日 · The procedure explained in this article applies to gas and vapour control valves including steam control valves. The method for sizing gas control valves is based on the method for sizing liquid control valves.

Sierra’s SmartVO™ control valves offer robust and field-proven direct-acting electromagnetic proportional control valve technology to compensate for a wide variety of temperature and pressure variations in the gas stream. You can even locally adjust response characteristics for multiple applications or system pressure design changes. View ...

Install these valves in gas pipelines to automatically control the flow of natural gas, propane, and butane to equipment. Limit wear and damage in high-cycling applications— these valves have additional seals that prevent leakage to reduce maintenance time.