Silent Check Valve

Overview

The Silent Check Valve is a spring-assisted, non-slam check valve designed for water supply and drainage systems.
The valve disc is guided by a central shaft at both inlet and outlet sides, ensuring precise alignment, fast response, and stable operation.

By combining a spring-loaded disc, streamlined flow path, and short closing stroke, this valve effectively eliminates water hammer, reduces noise, and delivers reliable sealing performance. It can be installed horizontally, vertically, or at any inclined angle, making it suitable for various pipeline layouts.

Product Description

This silent check valve adopts a compact ductile iron body with an internal streamlined cavity to minimize turbulence and pressure loss.
The valve disc is designed with a hollow structure and assisted by a spring mechanism, allowing rapid closure immediately when flow stops or reverses.

Compared with conventional swing check valves, the silent check valve offers shorter closing time, lower hydraulic resistance, and longer service life, making it ideal for pump outlets and systems sensitive to pressure surges.

Features & Functions

• Non-slam & silent operation
  Spring-assisted disc ensures fast closing, effectively eliminating water hammer and impact noise.

• Low flow resistance
  Streamlined internal design reduces sharp bends and turbulence, improving flow efficiency.

• Short closing stroke
  Disc stroke is only 1/4 of the nominal diameter, significantly reducing closing time.

• Enhanced sealing performance
  Precise disc guidance and elastic sealing provide tight shut-off without leakage.

• Compact & lightweight design
  Small installation space requirement and reduced pipeline load.

• High fatigue resistance
  Suitable for frequent opening and closing cycles.

• Flexible installation
  Can be installed vertically, horizontally, inclined, or at any angle.

• Corrosion protection
  Internal and external surfaces are coated with environmentally friendly anti-corrosion coating.

Applications

The silent check valve is widely used in:

• Water supply and distribution systems

• Drainage and sewage pipelines

• Pump discharge lines

• HVAC circulation systems

• Industrial and municipal water projects

• Clean water and hot water pipelines

Applicable media:
Water, hot water, industrial water, and other non-corrosive fluids.

FAQ

Q1: What is the main advantage of a silent check valve?
A: It prevents water hammer, reduces noise, and protects pipelines and pumps from pressure surges.

Q2: Can this valve be installed vertically?
A: Yes. It supports vertical, horizontal, inclined, and multi-angle installation.

Q3: Is this valve suitable for pump outlets?
A: Yes. It is highly recommended for pump discharge applications due to its fast-closing, non-slam design.

Q4: How does it compare to a swing check valve?
A: Silent check valves offer faster closing, lower noise, smaller installation space, and lower hydraulic shock.

Q5: Does the valve require frequent maintenance?
A: No. The compact structure and spring-assisted mechanism ensure long service life with minimal maintenance.