Home / Valves / Cast Iron Non Return Valve ( C. I. Non Return Valve )
A Cast Iron (C.I.) non-return valve, also known as a check valve, is a type of valve that is made of cast iron and is used to prevent the flow of liquids or gases from flowing in the opposite direction. It is designed to automatically open and allow fluid flow in one direction, and to close and prevent flow in the opposite direction.
The valve typically consists of a hinged or spring-loaded flap or disc that opens and closes to allow or prevent flow. The flap or disc is often guided by a cage or seat to ensure proper alignment and sealing. The valve is usually installed with the disc or flap facing upstream in the flow direction.
They are known for their durability and strength and can handle high pressure and temperature. They are also suitable for use with a wide range of liquids and gases. These valves are also easy to maintain and repair.
It is important to match the valve with the correct pressure class and the correct type of fluid. Some standards for Cast iron non-return valves are BS 5153, API 6D, MSS SP-71, and ISO 5208.