What is a Check Valve?

A check valve, also known as a non-return valve or one-way valve, is a mechanical device used in piping systems to allow fluid to flow in one direction while preventing reverse flow. Its primary function is to ensure that fluid flows only in the desired direction and to prevent backflow or reverse flow when the flow direction changes or stops. Check valves typically consist of a movable disc, flap, or piston that opens in response to forward flow and closes automatically to block reverse flow. They are commonly used in various industries, including plumbing, wastewater treatment, oil and gas, chemical processing, and HVAC systems.

Check valves come in different types, such as swing check valves, ball check valves, lift check valves, and diaphragm check valves, each designed for specific applications and operating conditions. They play a critical role in maintaining system integrity, preventing damage to equipment, and ensuring the efficient and safe operation of piping systems.

Uses:

• Preventing Backflow: Check valves are commonly used to prevent the backflow of fluids in piping systems. They allow flow in one direction while automatically closing to block reverse flow, ensuring fluid flows only in the desired direction.
• Maintaining Prime: In pump systems, check valves help maintain the prime of the pump by preventing the backflow of water or other fluids when the pump is turned off. This ensures that the pump remains primed and ready for operation.
• Protecting Equipment: Check valves protect equipment, such as pumps, compressors, and turbines, from damage caused by reverse flow or water hammer effects. By preventing backflow, they help maintain the integrity and efficiency of equipment in various industrial applications.
• Preventing Siphoning: Check valves are used to prevent siphoning effects in fluid systems, where fluid can flow out of a container due to gravity or pressure differences. They block reverse flow, maintaining the desired fluid level and preventing unintentional drainage.
• Controlling Flow Direction: Check valves can be used to control the flow direction in piping systems, allowing flow in one direction while blocking flow in the opposite direction. This feature is particularly useful in applications where flow reversal is undesirable.

Industries:

• Fertilizer Industries
• Pulp and Paper industries
• Industrial Chemical Piping Industries
• Oil and gas industries
• Petrochemical industries
• Textile and Process Industries
• Thermal and Nuclear Power industries

Description:

• Body Material- Cast steel and cast iron (LF2, A216, WCB, WCC, LCB,LCC, WC6, WC9), Ductile Iron, Stainless Steel [SS316, SS304, SS316L,SS904L, CF8, CF8M, F304, F316, F31L, F91), Alloy20 , Hastelloy ALBR, DUPLEX AND Super duplex STEEL [ F51, F53,F55 ] Forged Steel A105, A105N, F11, F22,F304, F316, F91] .
• Size- ½” – 80”
• Class-150 – 2500; PN10 – PN-450
• Ends- butt weld, flanged, lug, wafer, threaded, socket weld