Check Valves
Check valves are mechanical devices designed to allow fluid—whether liquid or gas—to flow in only one direction, preventing backflow that can damage equipment or disrupt system performance. Commonly used in industrial, plumbing, and MRO (maintenance, repair, and operations) systems, they automatically open with forward flow and close when flow reverses. Available in various types like swing, ball, and inline designs, check valves are essential for ensuring system integrity, protecting pumps and compressors, and maintaining operational safety.
Types of Check Valves We Offer:
- Swing Check Valves – Ideal for irrigation and low-pressure systems
- Ball Check Valves – Reliable for wastewater and slurry applications
- Piston Check Valves – Designed for precise flow control in hydraulic systems
Centro partners with leading manufacturers to provide top-quality materials and engineering in every check valve we supply. Browse our extensive selection and find the perfect check valve for your needs. Order online today or contact our experts for assistance!
Filter
Filter
1,226 items
content loaded
Configure product to see pricing
The Aladco Clean-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Clean-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Clean-Check valve, being vent free, is designed specifically for pneumatic applications used in clean/sanitary environments. The Clean-Check valve is also highly tolerant of external dust, dirt, oil, grease, detergent, cleaning solutions, and cutting fluids. The unique bubble-tight seal keeps devices from drifting toward the “checked” position in the event of pressure loss or fluctuation. To release the seal, press the manual override button or operate the pilot. Aladco highly recommends the use of spring centered 3 position 5-way centered vented valves for directional control with the use of Clean-Check valves.
Configure Product
Configure product to see pricing
The patented Aladco Dual-Check valve is a parallel normally closed set of pilot operated check valves in a single package that is designed to stop motion upon loss of air pressure and prevent the device from drifting. The tightly sealed ball checks in the Dual-Check valves are used on pneumatic devices to prevent air from flowing from both sides of the device towards the ball checks upon loss of pressure from a directional control valve. The Dual-Check valve is available with both a vented manual override and without. The vented manual override allows the user to exhaust both sides of the device simultaneously to minimize movement of the device as pressure is being relieved. The 62 Dual-Check valve series without the manual vent are suitable for clean-room environment. Aladco highly recommends the use of spring centered 3 position 5 way centered vented valves for directional control with the use of Dual-Check valves.
Configure Product
Configure product to see pricing
The Aladco Equa-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Equa-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Equa-Check valve is specifically designed for use in pneumatic applications where two-way flow is maintained to a device for load balancing. Combined with a pressure regulator to control air flow to and from a pneumatic tool balancer or manipulator, the Equa-Check valve will hold position and not be allowed to drop until the override of the Equa-Check valve is activated.
Configure Product
Configure product to see pricing
The Aladco Nu-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Nu-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Nu-Check valve, designed specifically for pneumatics, is a patented Aladco product. It was the first check on the market with both manual and pilot release capabilities. The unique bubble-tight seal keeps devices from drifting towards the “checked” position in the event of pressure loss or fluctuation. To release the seal, press the manual override button or operate the pilot. Aladco highly recommends the use of spring centered 3 position 5-way centered vented valves for directional control with the use of Nu-Check valves.
Configure Product
Configure product to see pricing
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$241.23$525.75
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$137.15$298.90
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$291.27$634.80
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$147.61$321.70
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
Configure product to see pricing
The Aladco Clean-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Clean-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Clean-Check valve, being vent free, is designed specifically for pneumatic applications used in clean/sanitary environments. The Clean-Check valve is also highly tolerant of external dust, dirt, oil, grease, detergent, cleaning solutions, and cutting fluids. The unique bubble-tight seal keeps devices from drifting toward the “checked” position in the event of pressure loss or fluctuation. To release the seal, press the manual override button or operate the pilot. Aladco highly recommends the use of spring centered 3 position 5-way centered vented valves for directional control with the use of Clean-Check valves.
Configure Product
Configure product to see pricing
The patented Aladco Dual-Check valve is a parallel normally closed set of pilot operated check valves in a single package that is designed to stop motion upon loss of air pressure and prevent the device from drifting. The tightly sealed ball checks in the Dual-Check valves are used on pneumatic devices to prevent air from flowing from both sides of the device towards the ball checks upon loss of pressure from a directional control valve. The Dual-Check valve is available with both a vented manual override and without. The vented manual override allows the user to exhaust both sides of the device simultaneously to minimize movement of the device as pressure is being relieved. The 62 Dual-Check valve series without the manual vent are suitable for clean-room environment. Aladco highly recommends the use of spring centered 3 position 5 way centered vented valves for directional control with the use of Dual-Check valves.
Configure Product
Configure product to see pricing
The Aladco Equa-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Equa-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Equa-Check valve is specifically designed for use in pneumatic applications where two-way flow is maintained to a device for load balancing. Combined with a pressure regulator to control air flow to and from a pneumatic tool balancer or manipulator, the Equa-Check valve will hold position and not be allowed to drop until the override of the Equa-Check valve is activated.
Configure Product
Configure product to see pricing
The Aladco Nu-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Nu-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Nu-Check valve, designed specifically for pneumatics, is a patented Aladco product. It was the first check on the market with both manual and pilot release capabilities. The unique bubble-tight seal keeps devices from drifting towards the “checked” position in the event of pressure loss or fluctuation. To release the seal, press the manual override button or operate the pilot. Aladco highly recommends the use of spring centered 3 position 5-way centered vented valves for directional control with the use of Nu-Check valves.
Configure Product
Configure product to see pricing
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$241.23$525.75
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$137.15$298.90
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$291.27$634.80
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
TC Series true union ball check valves are offered in PVC, CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVC only and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All valves are assembled with silicone free lubricant.
$147.61$321.70
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
YC Series y-check valves are offered in PVC and CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are assembled with silicone free lubricant.
$566.09$679.25
Should ship between 22 Oct and 26 Oct
Subject to factory lead times
FAQS
- A check valve is a one way valve that allows fluid to flow in one direction only and automatically prevents backflow in a piping system.
- A check valve opens when fluid flows in the correct direction and closes when flow stops or reverses. The closing mechanism may use a disc, ball, flap, or spring depending on the valve design.
- Check valves are used to protect pumps, compressors, piping, and equipment from damage caused by reverse flow. They are commonly installed on pump discharge lines.
- Swing check valves rely on gravity and flow to open and close, while spring loaded check valves use a spring to close quickly and reduce water hammer.
- Check valves are made from materials such as cast iron, ductile iron, stainless steel, brass, bronze, PVC, CPVC, and other plastics depending on application needs.