2020年8月28日 · A Check valve is a mechanical device used in piping and pipeline systems to prevent back-flow. Check valves allow fluid flow only in the forward direction that’s why it is called a one-way valve or non-return valve. They work on the principle of differential pressure.

A check valve is basically a one-way valve in which the flow can run freely one way, but if the flow turns, the valve will close to protect the piping, other valves, pumps, etc. If the flow turns and no check valve is installed, water hammer can occur.

Many similar pump-like mechanisms for moving volumes of fluids around use check valves such as ball check valves. The feed pumps or injectors which supply water to steam boilers are fitted with check valves to prevent back-flow.

2024年1月15日 · A check valve, also known as a non-return or one-way valve, is a two-port safety device that allows gas, steam, or fluid to flow in a single direction. Its primary purpose is to restrict backflow in a system.

An essential element in the design of water and wastewater pumping systems is the proper selection of the pump discharge check valve, whose purpose is to automatically open to allow forward flow and automatically return to the closed position to prevent reverse flow when the pump is not in operation.

2018年7月24日 · Check valves, or one-way valves, are designed to stop backflow and, ultimately, to protect pumps and compressors. Check valves are found in many industries and with various applications ranging from municipal water to mining and natural gas.

2021年9月17日 · A pump check valve is a self-actuating, one-way or non-return valve. This automatic safety device allows fluids to flow freely in one direction. However, if the fluid flow is reversed, the valve will automatically close, thus protecting the connected piping and pump.

Check valves are commonly found protecting pumps in liquid applications or compressors in gas systems where backflow could cause the pump or compressor to shut down. They are also applied in process systems that have varying pressures, which must be kept separate.

2024年2月22日 · Check valves to ensure fluid moves in one direction, preventing undesirable backflow that can lead to system contamination and damage. They protect pumps and generators by preventing reversal and maintaining the intended flow direction. Check valves to stop undesired backflow from containers, maintaining the integrity of the system.

By installing a check valve on the pump discharge, you can mitigate the effects of water hammer, reducing the risk of damage to the piping system and associated equipment. Types of Check Valves Suitable for Pump Discharges