InvenaMSRP:Now: £14.99Was:The swing check type non return check valve prevents water from returning to the source after being pumped away. It's swing type valve. Specifications: - Material: Brass; - Size: 1/2", 3/4", 1", 5/4" (1 1/4"), 6/4" (1 1/2") or 2" BSP; - Thread type:...MSRP:Now: £14.99Was:
InvenaMSRP:Now: £12.99Was:Non return check valve fully made of brass with spring mechanism to let the water flow only one way. Check valve can last maximum pressure of 12 bar. There are range of sizes available. Specifications: - Material: Brass; - Insert material: Brass; - Size:...MSRP:Now: £12.99Was:
InvenaMSRP:Now: £11.99Was:Check valve non-return valve female to female. Suitable for water and central heating installations. It allows fluid (liquid or gas) to flow through it in only one direction. Specifications: - Material: Brass; - Insert material: Plastic; - Size: 1/2",...MSRP:Now: £11.99Was:
ItapMSRP:Now: £21.99Was:Foot check valve is suitable for suction lines on top-offtake tanks (where an anti-siphon valve is not present). Brass valve body, with NBR sealing disc. These foot valves are often used in dispensing pump systems, particularly with Centrifugal pumps,...MSRP:Now: £21.99Was:
A check valve, clack valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.
An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.