Double block & bleed plug valve

Double block & bleed plug valve

The double block & bleed plug valve is designed based on the structure of the world-renowned standard pressure balanced plug valve, and is operated and maintained in the same way. Because the only movable parts are the valve core and the valve stem, the basic operation of the valve is very simple. When the valve core rotates 90, the valve will move from closed to open; and vice versa.

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Why Choose EDVC?

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., 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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The role of Double block & bleed plug valve

The valve is designed according to the requirement of keeping the minimum flow change, in order to achieve the maximum flow area at the minimum flow change. The result of this design is that the CV value of the valve is the largest among products of similar specifications.
Compared with two independent single stopcock valves of the same caliber, the flow rate of the valve is larger than them, and the pressure loss is smaller than them.

Frequently Asked Question

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Image result for double block and bleed ball valve Testing for double block and bleed quality Valves requires the pressure-testing of each seat, with leakage measured through the Valve body bleed as a means of substantiating the independent leak tightness of both the upstream and downstream seats of the Valve.

These valves are available bi-directional in metal seated and soft seated style, in bubble tight shut off. Sometimes called twin valves, DB&B valves are available in Plug and Trunnion Ball type up to 600mm NB in ANSI 150 to 2500 class.

The double block and bleed system requires the use of two valves and a spool piece. A bleed valve is used to drain the spool and verify seal integrity.

Our updates and blog posts

double-block-bleed-plug-valve | Can you tell the material of these valves?

{keyword}.Many valves can adapt to a variety of working conditions, but if the valve material is unreasonably selected, the performance and service life of the valve will be greatly reduced.

double-block-bleed-plug-valve | Classification of valves

{keyword}.Valves are divided into gate valves, globe valves, butterfly valves, high-pressure valves, low-pressure valves, fluorine-lined valves, safety valves, pressure relief valves

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{keyword}.General purpose valve,cast iron valve,Cast steel valve,Stainless steel valve,bronze valve, Brass valve ,Forged valve,plastic valve,Ceramic valve,Faucet,Stop cock, stop valve

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