What is non lubricated plug valve?

What is non lubricated plug valve?

Non lubricated plug valve contain a polymeric body liner or a sleeve, which is installed in the body cavity. The tapered and polished plug acts like a wedge and presses the sleeve against the body. The nonmetallic sleeve reduces the friction between the plug and the body.
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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.

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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) .

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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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Non lubricated plug valve instead of lubricated plug valve

Non lubricated plug valves are used instead of lubricated plug valves, where maintenance needs to be kept to a minimum. They can be used in special services (e.g. sulphur and hydrogen fluoride), since they do not have a body cavity in open communication with the flow when switching, where fouling liquids could be trapped or solidify, potentially jamming the valve. These valves are not torque seated.

Frequently Asked Question

Do you have any question?

Non lubricated valve do not employ lubrication as a means of protection. There are three sub-types of non-lubricated valves based on the design or material. Some non-lubricated plug valves use an elastomeric sleeve to protect plug valve components.

The three main types of non-lubricated plug valves are: Lift-type plug valve Elastomer sleeved plug valve Fully lined plug valve

Non lubricated plug valve are limited by temperature and chemical compatibility of the non-metallic materials they are made of.

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