Check valves are flow sensitive and rely on line pressure and flow to open and close. The internal disc allows fluid to flow forward, thus opening the valve. As forward flow decreases or reverses, the disc begins to close the valve, depending on the design. The function or purpose of a check valve is to prevent reverse flow. The structure is usually very simple, with only a few parts, such as valve body, valve seat, valve disc and valve cover. Depending on the design, there may be other items such as stems, hinge pins, disc arms, springs, balls, elastomers, and bearings.
Available in sizes 2" - 48"
Ductile Iron Construction for 250 PSI service
100% Flow area
Energy efficient
Fusion Bonded Epoxy - interior and exterior
Domed Access Cover
One moving part for long valve life
25 Year Disc Warranty on the flex portion of the disc
Manufactured under a certified ISO 9001 quality system
Characteristic: Flex Check Valve
Design & Manufacture: BS1868, API 6D, Asme B16.34
Pre-Temp. Rating: Asme B16.34
Face to Face: Asme B16.10
Ends Connection: Asme B16.25, Asme B16.5/16.47
Inspect & Test: API 598
Certificate 1: Dnv CE 0575
Certificate 2: ISO 9001: 2008
Trademark: VATAC/VANGO or OEM
Transport Package: Sea Worthy
Specification: API, ANSI, ASME, DIN, JIS, GB etc.
Origin: China
Feature:
1) 100% circulation area to ensure extremely low head loss.
2) The swing flexible check valve is the only moving part that ensures maximum maintenance time.
3) Synthetic reinforced disc provides a very tight seat.
4) Non-slam closure reduces damaging water hammer.
Swing Check Valve
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