CNC machine tools ,large vertical lathes, drill press, milling lathe grinding machine , Welding machine , separate metal working workshops and many general machine tool etc.
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.
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) .
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.
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.
Peculiarity of Rising Stem Ball Valve is that when the ball is in close position, the tight sealing between the ball and the single fixed seat is granted in both directions. Rising Stem Ball Valves can be operated with manual gear or with electric, pneumatic or hydraulic actuators.
Non-contact Rising Stem Ball Valve is designed to avoid issues of trunnion mounted, floating ball and other conventional valve types under the following extreme conditions:
High / low temperature and temperature fluctuation
High pressure / high differential pressure
Media with solid particles
(ESD) Emergency shutdown / fast stroke
Metal to metal sealing.No weak parts (such as springs) are required in order to obtain perfect sealing. Sealing is obtained mechanically - independent on line pressure.
Main features: With rising stem and mechanical cam design to achieve the tilt and turn action, eliminates friction and abrasion between body seat and ball surface. Single seat design can eliminate the problem of excessive pressure trapped in the body cavity. Rising stem ball valves are widely used in those plants where are with high temperature, high pressure, frequent operation, zero leakage, emergency shutoff, hazardous medium isolation, etc. Some typical applications such as molecular sieves exchange valve, hydrogen dispenser inlet and outlet valve, emergency shutoff valve, measuring pipeline shutoff valve,etc.
Rising Stem Ball Valve – RSBV. Valbart RSBV Rising Stem Ball Valves are the oil and gas industry’s choice for applications requiring a mechanically energized metal or soft seat to prevent losses from process contamination or material leakage.
ORBIT rising stem ball valve incorporate a proven tilt-and-turn operation that eliminates seal rubbing, which is the primary cause of valve failure. The absence of seal rubbing during both opening and closing means easy, low-torque valve operation and long-term reliable performance.
When an ORBIT rising stem ball valve is closed, the core is mechanically wedged tightly against the seat, ensuring positive shutoff. When a valve begins to open, the core tilts away from the seat and line flow passes uniformly around the core face.