Check-valve: A useful tool in water supply & wastewater treatment
What is a Check Valve?
A check valve is a reflex safety device designed to allow fluids and gasses to flow in one direction while preventing reverse flow. The pressure of the fluid passing through a pipeline opens the valve of the inlet while any reversal of flow will close the valve. So the valve that is used to prevent backflow in a piping system is known as a check valve.
The flow of fluid remains constant as long as the pressure is kept high enough to keep the disc open. If there is a pressure drop, the disc will automatically return to its seat and cease the flow. Depending on the size, purpose, and operation of the check valve, the cracking pressure range vary from 3 psi to 350 psi. Pressure causes the valve to open. It is otherwise known as non-return valve (NRV).
It permits complete, unhindered flow and automatically closes as pressure drops. Check valves seal tightly to stop leaks and guarantee that gases or liquids are flowing in the proper direction. The valve's mechanism will determine the precise action. Check valves regulating the flow of liquids & prevent pumps and compressors from major damages.
Types of check valves
There are innumerable check valve available in the market for water, wastewater, and industrial applications. They accomplish the same goal but with different methods. A variety of swing check valves, ball check valves, tilted disc check valves, slanted seat check valves, nozzle check valves, and quiet check valves are available from Shanghai Agile Valves. Swing check valves and ball check valves are the most popular designs of check valves for water and wastewater systems:
Swing check valves: Swing check valves have a disc mounted on them that swings on a shaft or hinge. The disc swings off the seat to enable forward flow and when the flow is halted, the disc swings back onto the seat to impede reverse flow. The weight of the disc and the return flow have an impact on the valve's ability to shut off.
Ball check valves: A ball that slides up and down inside the valve is how a ball check valve works. The seat of the conical chamber is machined to fit the ball in order to seal and prevent a reverse flow.
Where do check valves get their use?
There are numerous check valves and they are used in many different applications. Often, they are placed on the outlet side of a pump to protect the pump from backflow. Check valves are crucial for maintaining water pressure in the pipes since centrifugal pumps, the most prevalent kind of water pump, are not self-priming. Moreover, HVAC (heating, ventilation, and air conditioning) systems utilized in large buildings frequently use check valves. These check valves are set up to prevent coolant from flushing back down.
Choosing a check valve: a few things to think about
It's crucial to consider the system's costs and benefits while selecting a check valve. The goal is frequently to cut costs while also achieving the lowest pressure loss feasible, however, with check valves, a higher level of safety equates to a higher level of pressure loss. Verify that the check valve is adequately protecting the system. Otherwise, it will end with the risk of water hammer, acceptable pressure loss, and financial consequences due to fresh installation. Please contact Shanghai Agile Valves to choose the right check valve for more details.
Different types of check valves are available for different applications including water, wastewater, and fire protection. They accomplish the same goal but in different methods. Shanghai Agile Valves Co., LTD offers a wide range of swing check valves, ball check valves, tilting disc check valves, and slanted seat check valves to meet your precise need. See the full range of check valves at https://agilevalve.com/!
