150LB Stainless Steel Flange Swing Check Valve

1.Core components of the 150LB Stainless Steel Flange Swing Check Valve including the valve body, disc and seat are all made of stainless steel. The 304150LB Stainless Steel Flange Swing Check Valve is suitable for weak acid and weak alkali media, while the 316/316L stainless steel ANSI check valve can withstand highly corrosive environments such as seawater and high salt spray. It has a service life far longer than that of carbon steel valves, meeting the stringent requirements of overseas coastal and chemical projects.

2.The valve body of the 150LB Stainless Steel Flange Swing Check Valve is pickled and passivated to remove surface oil stains and scale, forming a dense passivation film to enhance corrosion resistance. For export, our ANSI stainless steel check valves are additionally coated with anti-rust oil and wrapped with anti-rust film to prevent rust during logistics and transportation.

3.The 150LB Stainless Steel Flange Swing Check Valve is rigorously inspected in accordance with API 598 standard, including a shell hydrostatic test at 1.5 times the nominal pressure and a sealing performance test at 1.1 times the nominal pressure. A quality inspection report will only be issued upon passing all inspections.

Our Advantages

1.Each 304/316 stainless steel 150LB Flange Swing Check Valve is inspected one by one in compliance with international standards such as API 598, API 609, CE and ISO 9001, meeting the compliance requirements of the European market.

2.All our China-manufactured ANSI stainless steel check valves undergo comprehensive inspections for leakage rate, pressure resistance and silent closure performance to avoid water hammer damage, making them suitable for working conditions such as high pressure and steam service.

Q：What are the specific standards for the hydrostatic test and sealing test of stainless steel check valves?

A：Implemented in accordance with API 598 standard: The shell hydrostatic test pressure is 1.5 times the nominal pressure, with a pressure holding time of not less than 30 minutes, and it is qualified if there is no leakage or deformation; the sealing performance test pressure is 1.1 times the nominal pressure, tested with clean water or non-corrosive medium to ensure zero-leakage sealing effect, and the product can only leave the factory after passing the test.

Q：What precautions should be taken during the installation of stainless steel check valves?

A：1. The installation direction must be consistent with the medium flow direction (the direction of the arrow marked on the valve body), and reverse installation is strictly prohibited; 2. Ensure the gasket is tightly fitted when connecting the flange, and the bolts are evenly tightened to avoid leakage caused by uneven local stress; 3. Remove impurities in the pipeline before installation to prevent wear of the sealing surface; 4. Reserve sufficient maintenance space for later maintenance.