Expanding gate valve

The opening and closing part of the expansion gate valve is a gate. The movement direction of the gate is perpendicular to the direction of the fluid. It is used as a cut-off medium. When it is fully opened, the entire flow is straight. At this time, the pressure loss of the medium is minimal. Gate valves are usually suitable for working conditions that do not need to be opened and closed frequently and keep the gates fully open or fully closed. They are not suitable for use as regulation or throttling.

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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

We Have The Best Solutions for Your Business

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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Scope of application of expansion gate valve

The gate valve has low fluid resistance, wide applicable pressure and temperature range, unlimited medium flow direction, and good sealing performance. It is widely used to cut off or circulate the medium in the transportation pipelines of food, medicine, petroleum, chemical industry, natural gas, steel, environmental protection, papermaking, etc.

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Frequently Asked Question

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Expanding gate seating functionality: ISV parallel expanding gate design achieves tight mechanical seal under variations in the line pressures by providing opposing gate forces to the upstream and downstream parallel seats at the end of the open and closed position.

Expanding gate seating functionality: ISV parallel expanding gate design achieves tight mechanical seal under variations in the line pressures by providing opposing gate forces to the upstream and downstream parallel seats at the end of the open and closed position.

Double expanding gate valves are made by two sliding pieces consisting of a gate and a second segment (male and female wedge segment). ... Sealing is achieved in both high and low pressure conditions by expanding the gate and the segment out towards the seats while the wedge is in a closed position.

Our updates and blog posts

expanding-gate-valve|Common faults and solutions for knife gate valves

{keyword}.Leakage of closing parts of knife gate valve: The leakage of stuffing box is usually called external leakage, and the leakage of closing parts is called internal leakage.

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{keyword}.There are many types of gate valves, including soft-seal gate valves, hard-seal gate valves, etc., and knife gate valves belong to one of them.

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{keyword}.Stainless steel knife gate valve is a very commonly used valve, but because it is working in mines and power plants, it will digest the life faster.

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