Poppet & Ball Check Valves

It is important to note that the poppet style check valve is usually designed to be normally closed. Poppet type valves generally utilise a spring to force shut the orifice by holding a component against a seal to replicate the backflow pressure. Spherical shapes like ball bearings with smooth surfaces, which seal against an o-ring seal, or poppets, which generally incorporate an o-ring seal and seal against a smooth face.

When the forward pressure overcomes the spring force the valve opens, at this point the term cracking pressure is given to this action. An advantage of these types of check valve design are the low cracking pressures that can be achieved with repeatability. Small differentials in forward and backflow pressures can be accommodated. Low cracking pressures such as 0.1psi are achievable.

When the check valve is fully open, flow in one direction is relatively unrestricted. When closed the check valve should not exhibit any flow. The key benefit of building a spring into a check valve’s mechanism is that it largely eliminates the effect of gravity on check valve function. Without a spring, gravity and thus the valve’s vertical orientation can become a critical factor for a check valve to work properly.

Poppet & Ball Check Valves

It is important to note that the poppet style check valve is usually designed to be normally closed. Poppet type valves generally utilise a spring to force shut the orifice by holding a component against a seal to replicate the backflow pressure. Spherical shapes like ball bearings with smooth surfaces, which seal against an o-ring seal, or poppets, which generally incorporate an o-ring seal and seal against a smooth face.

When the forward pressure overcomes the spring force the valve opens, at this point the term cracking pressure is given to this action. An advantage of these types of check valve design are the low cracking pressures that can be achieved with repeatability. Small differentials in forward and backflow pressures can be accommodated. Low cracking pressures such as 0.1psi are achievable.

When the check valve is fully open, flow in one direction is relatively unrestricted. When closed the check valve should not exhibit any flow. The key benefit of building a spring into a check valve’s mechanism is that it largely eliminates the effect of gravity on check valve function. Without a spring, gravity and thus the valve’s vertical orientation can become a critical factor for a check valve to work properly.

Modular Check Valve, 1/4" OD Push-In Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 1/4" OD Push-In Input and Output, Nitrile Seals, Various Cracking Pressures

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Modular Check Valve, 1/4" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 1/4" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

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Modular Check Valve, 5/16" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 5/16" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

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1/8" White Polypropylene Swivel Ball Check Valves - Various Cracking Pressures

1/8" White Polypropylene Swivel Ball Check Valves - Various Cracking Pressures

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1/16" White Polypropylene Swivel Ball Check Valves - Various Cracking Pressures

1/16" White Polypropylene Swivel Ball Check Valves - Various Cracking Pressures

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1/4" White Polypropylene Swivel Ball Check Valves - Various Cracking Pressures

1/4" White Polypropylene Swivel Ball Check Valves - Various Cracking Pressures

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Modular Check Valve, 1/8" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 1/8" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

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Modular Check Valve, 6mm Push-In Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 6mm Push-In Input and Output, Nitrile Seals, Various Cracking Pressures

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Modular Check Valve, Female Thread Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, Female Thread Input and Output, Nitrile Seals, Various Cracking Pressures

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Modular Check Valve, 3/8" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 3/8" Barb Input and Output, Nitrile Seals, Various Cracking Pressures

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Modular Check Valve, 4mm Push-In Input and Output, Nitrile Seals, Various Cracking Pressures

Modular Check Valve, 4mm Push-In Input and Output, Nitrile Seals, Various Cracking Pressures

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5/8" OD Cartridge for Modular Check Valve, Polypropylene, Nitrile Seals, 3 psi Cracking Pressure

5/8" OD Cartridge for Modular Check Valve, Polypropylene, Nitrile Seals, 3 psi Cracking Pressure

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5/8" OD Cartridge for Modular Check Valve, Polypropylene, Nitrile Seals, 0.5 psi Cracking Pressure

5/8" OD Cartridge for Modular Check Valve, Polypropylene, Nitrile Seals, 0.5 psi Cracking Pressure

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Nickel Plated Brass Check Valves, Buna-N Seal - 1.45 Cracking Pressure

Nickel Plated Brass Check Valves, Buna-N Seal - 1.45 Cracking Pressure

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Black Polysulfone Check Valve

Black Polysulfone Check Valve

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1/4" OD Cartridge Check Valve, Nylon Body, Buna-N seal, 1 psi Cracking Pressure

1/4" OD Cartridge Check Valve, Nylon Body, Buna-N seal, 1 psi Cracking Pressure

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Nickel Plated Brass Bodied Check Valves with Viton Seal

Nickel Plated Brass Bodied Check Valves with Viton Seal

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Polypropylene Bodied Check Valves with EPDM or Viton Seals

Polypropylene Bodied Check Valves with EPDM or Viton Seals

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PVDF (Kynar®) Bodied Check Valves with EPDM or Viton Seals

PVDF (Kynar®) Bodied Check Valves with EPDM or Viton Seals

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1/4" OD Cartridge Check Valve, Nylon Body, Buna-N seal, 0.5 psi Cracking Pressure

1/4" OD Cartridge Check Valve, Nylon Body, Buna-N seal, 0.5 psi Cracking Pressure

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