What is the function of the hinge in a swing check valve

Max Brass Push Check Assembly. SharkBite Max check valves are designed to prevent the reverse flow of water, compatible with PEX, copper, CPVC, PE-RT or HDPE ... Spring Kits; 304 Stainless Steel Nuts & Bolts; Drain Plug/Flush port; Braided Teflon Hinge Pin Packing. Resources: Check Valve Selection Chart ( ... The check valve TRI-CHECK combines all the benefits of the Series TRI-CON in a non-return valve. Triple-offset design with a wide seat angle and a true cone in ... Sprinkler head check valves also help to conserve the amount of water needed to fill the pipes each time the sprinklers begin running. By keeping the water in ... The special check valve is a swing style check valve with a spring-loaded air cylinder that provides spring force assisted closing. Norriseal check valves are designed for prevention of backflow in gas, air or liquid systems and are installed in critical services around the world. Contact an ... The No. 375 check valve is made of a one-piece cast brass body. Designed to operate in any position, a sensitive spring has been added to close the poppet ... A check valve connects each water source to the fire sprinkler system. This valve only opens in one direction, allowing water to flow from the source, into the ... A non-return valve lets the fluid flow in one direction. As the name implies, the primary function of a non-return valve is to keep the flow of fluid in just ... Conserve Water & Eliminate Low-Head Drainage with Check Valves. A check valve holds back water where elevation changes occur, preventing wasteful low-head ...