Pp Non Return Valves By Hazra Engineers Enterprise

We are manufacturing and supplying of Pp Non Return Valves in Howrah, West Bengal, India.
Non Return Valves are automatic in operation and designed to prevent reversal of flow in fluid piping systems. The valves are maintained open by the flow of fluid in the forward direction and are closed by back pressure of the fluid or by the weight of the closing mechanism or by a spring force. Various designs are available as listed below.

The range of check valve sizes range from 50mm to massive units of 1200 mm diameter. The swing check variation is a low pressure drop unit based on a hinged disc. This type of valve is suitable for low velocity applications with infrequent velocity reversals. The valve can be fitted with external weights to allow faster closure to reduce water hammer or shock pressure on flow reversal. External systems can also be included to force the valve closed in the event of a local fire.