Check Valves

Check valves allow flow in one direction and close automatically against reverse flow. They are the primary defense against water hammer damage, pump reverse-rotation, and contamination from backflow — and they fail most often when the wrong type is selected for the system's flow profile. Selecting the right check design for your application matters more than the valve's price.

G & A Valves International supplies swing, lift, dual-plate (double-door), and tilting-disc check valves for commercial and industrial service, in common industrial sizes — contact us to confirm availability for your size and pressure class.

Product range and specifications

Swing check valves

• Sizes: available in common industrial sizes — contact us to confirm the size you need
• Pressure ratings: common PN and ASME Class ratings on request — tell us your line class and we will match it
• Body materials: ductile iron, carbon steel (e.g. WCB), and stainless steel (e.g. CF8/CF8M) are the industry-standard options — confirm availability with us
• Disc and seat: resilient-seated (e.g. EPDM) and metal-seated trims are common in the industry — ask us what is available for your application
• Connection: flanged connections to common standards (e.g. EN 1092-1, ASME B16.5) — confirm the flange standard and drilling you need when requesting a quote
• Best for: low-velocity systems with steady flow; not the first choice where water hammer is a concern — the disc's long travel makes swing checks prone to slamming when flow reverses quickly

Lift check valves

• Sizes: common small-bore industrial sizes — contact us to confirm the size you need
• Pressure ratings: common PN and Class ratings on request — tell us your line class and we will match it
• Body materials: brass, carbon steel, and stainless steel are the industry-standard body materials for lift checks — confirm availability with us
• Best for: high-pressure small-diameter lines and pump discharge; lift checks are widely used in condensate and steam service — confirm temperature and pressure ratings with us before specifying for steam

Dual-plate (double-door) check valves

• Sizes: available in common industrial sizes — contact us to confirm the size you need
• Pressure ratings: common PN ratings on request — tell us your line class and we will match it
• Body materials: ductile iron, carbon steel, and stainless steel are the industry-standard options — confirm availability with us
• Plates and springs: stainless steel plates with corrosion-resistant springs are the industry-standard trim for dual-plate checks — confirm trim details with us
• Connection: wafer (between flanges) — short face-to-face, light weight
• Best for: pump discharge where fast closure prevents water hammer; the spring-assisted plates close before flow reversal

Tilting-disc check valves

• Sizes: common large-diameter industrial sizes — contact us to confirm the size you need
• Pressure ratings: common PN ratings on request — tell us your line class and we will match it
• Body: ductile iron, double-flanged configurations are the industry standard for this type — confirm availability with us
• Best for: large-diameter water and wastewater lines; low head loss and non-slam closure — ask us about damping options for your application

Applications

• Pump discharge: dual-plate or tilting-disc check valves to prevent reverse flow and water hammer when pumps trip.
• Water and wastewater: swing and tilting-disc checks on treatment plant process lines; EPDM seats for chlorinated water.
• HVAC: lift and swing checks on chilled-water and heating circuits to prevent gravity circulation and backflow.
• Sewage and stormwater: flap-type check designs are commonly specified for lines carrying solids — ask us about suitability for your solids-handling service.
• Boiler feed and condensate: lift checks are widely used on condensate return — confirm temperature and pressure ratings with us before specifying.
• Oil, gas & petrochemical: dual-plate and swing check valves on pump discharge to prevent reverse flow and water hammer in refinery and petrochemical service — confirm pressure class, trim, and seat materials for your service conditions on your quote.

Common failure modes we help you avoid

• Slamming: oversized swing checks in high-velocity lines slam shut and crack discs. Dual-plate or tilting-disc designs close faster and quieter.
• Chatter: check valves installed too close to pumps or elbows chatter from turbulence. We advise on minimum straight-run distances — ask us for our published guidance for your layout.
• Wrong seat material: EPDM in oil service swells and fails; NBR or Viton is required. We check media compatibility before quoting.

Why buy check valves from GA Valves

• Parts supply: discs, seats, springs, and hinge pins stocked as spares.
• Assembly: valves assembled and tested before shipment.
• Training: hands-on maintenance training — your team learns to inspect and rebuild checks in-house.
• Project support: selection assistance by flow profile, and documentation packages for submittals — ask us about mill test certificates and test reports for your order.