Check Valve with Counter Weight

Size Range: DN40-DN400

Pressure: PN16

Body Materials: DI

Disc Materials: DI



  • QT450-10 valve body

    QT450-10 valve body, level 3 Spheroidization rate, tensile strength over 450Mpa, elongation over 10%. not easy to crack or freeze.

  • 250μm thickness epoxy coating

    250μm thickness epoxy coating. It is prevent corrode and rust.

  • Heavy type valve body

    Heavy type valve body.

  • Better wear-resisting and sealing performance

    Cr13 seat, better wear-resisting and sealing performance.

  • Double-layer pressure detection

    Each valve will be inspected for shell and seal pressure before leaving factory.


Working temperature:-10℃~120℃
Suitable medium:Water,Oil,Gas
Application: Municipal construction, Power,Water supply, Petroleum industry

Product Identification:

Swing check valve is dependent on the flow of the medium itself and automatically open and close, It is  prevent the backflow of the medium , also known as check valve,one way valve, reflux valve,backpressure vale.


Parameter Information:
Executive standard:
Name   Face to face length Pressure Test
  DIN 3202 DIN EN 1092-2 DIN EN 12266
Material of Main Parts:
Name 1-Body 3-Disc 2-Seat 17-Counter Weight
Material DI DI Brass/SS/Rubber DI
DN NPS L φD φD1 φD2 b Z-d
40 1 1/2'' 180 150 110 84 18 4-19
50 2'' 200 165 125 99 20 4-19
65 2  1/2'' 240 185 145 118 20 4-19
80 3'' 260 200 160 132 22 8-19
100 4'' 300 220 180 156 24 8-19
125 5'' 350 250 210 184 26 8-19
150 6'' 400 285 240 211 26 8-23
200 8'' 500 340 295 266 30 12-23
250 10'' 600 405 355 319 32 12-28
300 12'' 700 460 410 370 32 12-28
350 14'' 800 520 470 429 36 16-28
400 16'' 900 580 525 480 38 16-31


Check valves, globe valves, ball valves, filters, rubber joints, etc. are commonly used pipe accessories in fluid pipelines, with functions such as cut-off, regulation, diversion, prevention of backflow, pressure regulation, diversion, or pressure relief. It is commonly used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media.


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Bundor quickly dispatched a professional technical team to the customer's engineering site to investigate the problems.

Contact us now if you have any questions about our company and products.We will retain your information completely private.


Who should we contact if there is after-sale problem?

You can send mail to or call us directly to Ms.Shirley. Business scopes spreads to middle China,West China,East China,South China and 76 countries &areas all over the world. We are familiar with all types of enterprises development strategy. Through reliable products and perfect services, the brand of Bundor has won extensive praise from customers.

What certificated does the factory have?

Bundor has 117 products patents and passes CE, CU-TR, API, WRAS, ISO9007, ISO18001, ISO14001, AAA credit grade certificate. Strictly in accordance with ISO, API, JIS, DIN and other standards for valve production, the factory has a perfect enterprise standardization system, has more than 80 sets of high-precision mechanical equipment and quality testing equipment. Can provide more than 10000 kinds of valve models, with a perfect computer system, with independent product research and development capabilities.

Which port is the nearest port from factory?

Bundor valve is located in jinan area, tianjin city, is a collection of scientific research, design, production, sales and after-sales service as one of the professional valve manufacturers, its main export port is tianjin port. Tianjin port is an important comprehensive port and foreign trade port in north China. After the order is confirmed, production can be arranged in 24 hours to ensure the delivery time. Bundor valve always adhere to science and technology and quality peers, dare to innovate, the pursuit of excellence.

What’s the payment terms?

T/T, L/C, D/P D/A, PayPal, Western Union, Cash, Escrow are all allowed. Bundor valve has a set of perfect international trade system. From international trade marketing promotion to international trade negotiations, the group's international trade market of Bundor has been developing steadily in developing countries and regions such as Asia, Africa and Latin America, and has successfully opened markets in developed countries and regions such as Europe and America.

Founded in 1990s, Bundor is an experienced manufacturing and trading combo specialized in the research & development, production and sales of Butterfly valve, gate valve, check valve, globe valve and other valves. 26 years adhering to the principle of manufacturing process of competent valve fittings,the control of valve manufacturing throughout all the production processes, correctly understand customer requirements, and commit to provide products that ensure customer satisfaction.Our team