What is a Check Valve?
A self-actuating backflow prevention device closing via disc weight, spring force, or flow reversal. Critical for protecting pumps from reverse flow damage (>10x rated pressure surge prevention).
-
![Swing Check Valve]()
Swing Check ValveSwing Check Valve ensure unidirectional flow and prevent damaging backflow using simple, reliable mechanics.view more -
![Double Check Valve]()
Double Check ValveDouble Check Valves (DCVs) provide redundant backflow prevention using two independently acting spring-loaded check assemblies.view more -
![Hydraulic Check Valve]()
Hydraulic Check ValveHydraulic Check Valves maintain unidirectional flow in high-pressure systems using precision-engineered sealing.view more -
![Spring Check Valve]()
Spring Check ValveSpring Check Valve ensure fail-safe backflow prevention with spring-assisted closure independent of orientation.view more -
![Drain Check Valve]()
Drain Check ValveDrain Check Valves prevent sewage backflow while enabling unrestricted drainage using specialized anti-clogging design.view more -
![Air Control Valve]()
Air Control ValveAir Control Valves precisely regulate pneumatic system pressure/flow using precision-balanced diaphragms and poppets.view more
Advantages
Ultra-Fast Closure
Dual-plate designs close in 25ms (prevents 92% water hammer).
Low Head Loss
Streamlined discs maintain 0.01 bar ΔP at full flow.
Silent Operation
Spring-assisted damping eliminates disc chatter.
Maintenance-Free
No lubrication required (100,000+ cycle lifespan).
Technical Specifications
- Cracking Pressure: 0.05-2 bar adjustable springs
- Materials: 316L SS discs, Inconel springs, EPDM seals
- Pressure Ratings: ASME B16.34 Class 150-900
- Testing: API 598 hydro/pneumatic seat tests
Types
Nozzle Check
Compact wafer design (50% shorter than swing checks).
Tilting Disc
15° seat angle for low-pressure systems.
Ball Check
For viscous media (80,000 cP viscosity handling).
Stop-Check
Manual override lock for maintenance bypass.
Applications
Boiler feed pump discharge (ASME Section I)
Cooling water circulation systems
Desalination plant brine recirculation
Fire pump test headers
Pipeline scraper launch/receive traps
We're professional check valve manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to buy high-grade check valve at competitive price from our factory.
