Quiet (Silent) Check Valve for Sump Pumps and Fluid Systems

The Quiet (Silent) Check Valve is specifically engineered to prevent media backflow while simultaneously absorbing and reducing fluid impact noise. This makes it an ideal choice for residential and commercial applications, such as sump pump systems, where noise reduction is critical.

Design and Performance Features

Noise Reduction: Designed to minimize or eliminate the water hammer effect and the associated noise often found in standard check valves, providing a “silent” operation.
Design Principle: The valve features a disc that slides along the centerline of the valve body, ensuring a smooth, guided shut-off mechanism.
Reduced Water Hammer: The short stroke of the disc effectively prevents the sudden reversal of flow, which is the cause of destructive water hammer.
Low Flow Resistance: The streamlined structure design optimizes media flow, resulting in a low flow resistance coefficient and efficient operation.
Compact Structure: Characterized by its small size, light weight, and excellent process feasibility.

Technical Specifications

Parameter	Specification
Type	Silent / Quiet Check Valve (Centerline Sliding Disc)
Function	Prevents media backflow, reduces fluid impact noise.
Size Range	DN50 to DN500
Pressure Rating	PN10, PN16, PN25
Connection Type	Flange (RF – Raised Face, FF – Flat Face, etc.)
Body Material Options	Ductile Iron (球铁), Carbon Steel (碳钢), Stainless Steel (不锈钢), Duplex Steel (双相钢), Super Duplex Steel (超级双相钢)
Applicable Systems	Domestic Water Supply Systems, Water Supply and Drainage Systems, Sewage Treatment Systems, Sump Pump Discharge Lines.

Advantages for Sump Pump Use

In sump pump discharge lines, the Quiet Check Valve provides two major benefits over traditional swing or ball check valves:

Eliminates Annoying “Clunk”: Prevents the loud, sudden slam that occurs when the pump shuts off and the column of water reverses direction.
Protects the Pump: By preventing destructive water hammer, it protects the pump and piping components from mechanical stress, prolonging system life.