What is a pressure balanced plug valve

What is a pressure balanced plug valve

Pressure balanced plug valves are used where pulsating or static high pressures are present. The benefi t a dynamic pressure balanced inverted plug gives is that it ensures equalised pressure between the plug and upper and lower body chambers.
Pressure is balanced by two holes in the plug which connects the plug port with the lower and upper cavities.The hole in the upper end is provided with a check valve so the pressure is always equal to the large end cavity and it is always equal to or greater than the line pressure in the small end cavity.

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Plus type fully equipped

CNC machine tools ,large vertical lathes, drill press, milling lathe grinding machine , Welding machine , separate metal working workshops and many general machine tool etc.

Multiple tests

Material analysis, PMI Material analysis. Chemical analysis. Low temperature test, Tensile Test ,Impact test, Hardness test. Wall thickness test, roughness test. Torque test. NDT Inspection (MT,PT,UT,RT). HIC test ,SSC test . Intercrystalline corrosion Test ,Uniform corrosion Test.

Passed ISO certification

The company is the first one to pass ISO 9001(2008),ISO 14001 ,OHAS 18001 international quality system certificate, China pressure pipe safety registration certificate (AZ), European Union safety registration certificate (CE0036), and American Petroleum Institute Certificate (API 6D) and (API607) .

Industry Association Member

We are one of the member unit of China Valve Association as well as China Gas Association, member unit of first class supplying network of CNPC and member unit of fittings supplying network of State Power Corporation.

about EDVC

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EDVC VALVE CO.,LTD.is a specialized in valve manufacturing enterprise with more than 15 years of history.We main produce Top Entry Ball Valve, Fully Welded Ball Valve, Arc Valve, Aluminum Bronze Valve, Automatic Recirculation Valve, Orbit Ball Valve, Safety Valve, Globe Valve, Tilting Disc Check Valve and Rising Stem Ball Valve etc.


The products have been exported to Austria, France, Germany, United Kingdom ,America, Middle East and Asia, Africa . areas and countries. Moreover, the products are widely used in the fields of oil & gas, Oil refinery, Petrochemical,power station ,Sewage treatment, pharmacy, Paper mills, pipeline industry , mining industry , chemical industry and environmental protection.

We are a professional manufacturer of valves in China, with the aim of "providing the first class products and services". On behalf of all of the members at EDVC Valve, we thank you for the opportunity to earn your business.

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Pressure balance lubricated plug valve | EDVC Valve

Pressure balance lubricated plug valves are metal seated valves providing a tight shut off ( 0 leakage ) sealing, valves shall be regularly lubricated along with their operation by injection of suitable grease. Thanks to the absence of any body cavity and as well as a simple & tough design, they are highly recommended for any critical “Full ΔP” operation and for handling any media with an high % of solids contents, further more they provide an excellent resistance to abrasion, they are free from routine maintenance, providing a long service life.

Frequently Asked Question

Do you have any question?

Uniqueness of dynamically and pressure balanced design together with inverted plug design, assure prevention of locking, which has been the problems of conventional design at higher pressure application. Pressure Balance Lubricated Plug valves are manufactured using a wide range of materials to suit the service applications..

In order to reduce the torque of conventional hard-seal plug valves, pressure balanced plug valves are often used.

Pressure-balanced inverted oil-sealed plug valves are widely used in pipelines in various working conditions such as petrochemical, pharmaceutical, fertilizer, and power industries to cut off or connect pipeline media. .

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