The three-in-one check valve features a streamlined design to reduce pressure loss and supports horizontal or vertical pipeline installation. A built-in opening indicator allows for real-time adjustment of pump output, and media shut-off or bypass priming and recovery is achieved through valve stem rotation. Its flanged connection design is compatible with pipelines from DN40 to 1200mm, and it can handle media temperatures up to 250℃, with nominal pressures ranging from 1.0 to 4.0 MPa. Core components include a copper alloy valve disc, a 2Cr13 stainless steel valve stem, and a ductile iron valve body, meeting the protection requirements of various industrial applications such as building water supply and drainage, and boiler condensate systems.
Structural Composition
Valve Body:
Commonly cast iron, stainless steel, or carbon steel; material selected based on requirements.
Valve Disc (Core):
Stainless steel or copper alloy, lightweight and durable.
Sealing Surface:
Rubber (NBR, EPDM) or PTFE, ensuring a tight seal.
Auxiliary Devices:
Springs, dampers, or flame arresters for multi-functional integration.
Connection Methods:
Flanges, wafers, threads, adaptable to different pipelines.
Working Principle
Depending on the specific combination of the "three-in-one" functions, the operating mode may include:
Check Flow:
The valve disc opens when the medium flows in the forward direction and closes when it flows in the reverse direction to prevent backflow.
Silence or Slow Closure:
Noise and water hammer effects are reduced during closure through soft seals or buffer devices.
Additional Functions:
Such as backfire prevention (gas systems) or flow regulation (with control device).
Application Scenarios
Water Supply and Drainage Systems → Prevents backflow and reduces water hammer and noise.
Fire Protection Piping → Ensures unidirectional flow, protecting pumps and pipes.
Gas Systems → Prevents gas backflow and flashback (e.g., acetylene piping).
Industrial Piping → Multi-functional protection, adaptable to complex operating conditions.
HVAC → Hot water circulation, maintaining system stability.
Three-in-one Check Valve Factory
