Check Valve Collection

Check valves are employed in a wide range of piping used to transport fluids, or keep the gases or fluids in the piping separate. Check valves allow the release of content only in one direction. At times it doesn't have an external handle to make them work, they work automatically on the basis of internal pressure.

Check Valve Manufacturing


XINTAI VALVE GROUP CO., LTD. was founded in 1998, is a professional valve manufacturing company that conjoins R&D, casting, development, production and sale. The Group's headquarters is located in the Longgang Airport New District, Wenzhou, and is centered on research and manufacturing technology.

The factory covers an area of approximately 30,800 square meters. The two major bases for casting were respectively located in the central industrial zone of Longwan District, Wenzhou, with an area of 9,800 square meters. Longwan Airport New Area Casting Base in Wenzhou, with an area of 28,000 square meters. The existing staff of 578 people, including high and mid-level engineering and technical personnel 58 people, mainly in oil, natural gas, chemical, power stations, metallurgy, national defense, water conservancy projects, pharmaceuticals and other fields.

Check Valve Inspection Report

We will issue an inspection report like this before all orders ship. The basic inspection steps include a visual examination, dimension check, witnessing test, painting check, packaging check, then issuing the finished test report. We can also carry out special tests according to customer requirements.

Our Team

We Will Serve You With The Best of Our Capacity By Expert Team

We are prestigious manufacturer and supplier of Industrial Casting Ball Valves in Wenzhou.

XINTAI is registered with the following governmental agencies:

American Petroleum Institute(API) No. 6D-1778
Quality Management System Certificate of Approval (ISO9001:2015)
Certificate of Quality System Approval(CE) No. HPiVS-IP1001-015-Q-04-00
Certification of Registration( OHSAS18001) No.86185710109S

We design, engineer and produce your tailor-made valves.

The Best Solution for Oil& Gas industry

Serving an impressive list of long-term clients with experience and expertise in industries.

Check Valves, Types and Uses

Since check valves are used in different types of industries they are manufactured in carbon steel, alloy steel or stainless steel. Depending on size it is necessary pieces in the piping. Although check valves are designed on the basic API 6D standard, for different industries they are further customized according to API 608,609,602, or 600 criteria.

The most important criteria to be considered in installing check valves in a piping is the cracking pressure. This is the pressure that opens the check valves and thus choosing the right fit for the piping is crucial. It is used where need to:

- Prevent the reverse flow of contents of fluids or gases present in the pipe system.
- Shield the other components of the pipeline from the damage by blocking any backflow.
- Thwart the flow because of gravity or pressure variations.

Broadly speaking there are the following types of check valves:

Stop C V: This type of check valve is a designed to cut off the supply of the liquid, water, oil or gas irrespective of the direction of flow. Stop check valve can stop the flow of contents irrespective external pressure.

Ball C V - It has a spherical metallic ball to cut-off the flow. It is used in pipe systems that carry gel or liquid contents. In some designs the ball is made up of ruby.

Lift- C V:The disc in this valve is lifted to facilitate the flow of fluid. The valve closes when the pressure recedes.

Diaphragm C V: This valve has a flexible diaphragm that opens or closes depending upon the flow and pressure in the pipeline

Besides the above mentioned types there are various other designs of check valves and each type gives rise to a different category, for example bulky lift check valves can be replaced with wafer check valves.

Valves are a huge category and are most frequently used in the chemical, water, oil and gas, power, pulp and paper industry. They are also used in fire systems such as dry pipe fire sprinkler systems. In all the applications check valves thwart the backward flow of water or fluids into the piping system.

Thus, based on the industry requirement you can choose from wide variety of design specifications.

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