What is a through conduit gate valve

The through conduit gate valve is a typical parallel gate valve.The through conduit expanding gate valve is developed on the basis of slab gate valve. Instead of one “slab”, the disc consists of two halves with a wedge-shaped interface. Both the female and male gates are provided with complementary opposed inner faces, each formed with two angular-related surface portions diverging transversely. The two halves(gates) are interlinked so that they wedge apart when being moved into the fully open or closed positions, but relax in the intermediate position during the disc travelling stroke. The wedge mechanism ensures tight seal on both upstream and downstream seating surfaces even at low pressure levels. Through conduit gate valves are widely used in oil & gas, petrochemical, power plant and mining industries.

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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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Application of through conduit gate valve

Through conduit gate valves are isolating valves designed for  full  closing  of  the  working  media  flow.  They  can  be  used  for  temperatures  up  to  200°C.  If  the  gate  valves  are  used  for regulating  or  throttling  purposes,  the  manufacturer  does  not  guarantee  the  tightness.  The  gate  valves  are  full-bore  piggable  valves  with  a  flow  resistance  coefficient  equal  to  that  of  the  piping.  Therefore  they  are  suitable  especially  for  long-distance  pipeline systems.

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1. Straight-through stop valve. The stem of the straight-through stop valve forms a 90° angle with the center line of the medium passage. This type of stop valve is the most widely used in power plants. Direct current globe valve. The direct-flow globe valve is an angle between the valve stem and the center line of the medium passage. 2. The straight-through type refers to the horizontal straight-through type, which corresponds to the angle type. The direct current type is generally a kind of straight-through valve, and the direct current generally flows directly without a curved flow path in the middle. The straight-through type can have S-shaped flow passages, such as most of the globe valves and regulating valves

Sizes: 2" - 42" Classes: 150 - 1500 SCV Valve ​manufactures some of the most dependable cast steel Thru Conduit Slab and Expanding Gate Valves in the industry. Both designs utilize flanged and butt-weld end connections, and are manufactured and tested in accordance with API 6D.

Through Conduit Gate valves offer increased value by incorporating advanced design features. These valves are designs and manufactured with a full bore port, rising stem, OS & Y type with floating seats. These valves are robust in construction and easy In-Line maintainability.

Our updates and blog posts

through-conduit-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.

through-conduit-gate-valve|What is the difference between a knife gate valve and a gate valve

{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.

through-conduit-gate-valve|Good habit of preventive maintenance, the life of stainless steel knife gate valve is three times longer

{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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