HC41X Silencing Check Valve

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HC41X Silencing Check Valve

HC41X Silencing Check Valve

The HC41X Silencing Check Valve is a spring-assisted, silent check valve designed to prevent water hammer and reduce noise in pipeline systems.

Performance and characteristics:

Product Overview

The HC41X Silencing Check Valve is a spring-assisted, silent check valve designed to prevent water hammer and reduce noise in pipeline systems. Its unique disc design and spring mechanism ensure smooth, quiet operation while maintaining reliable backflow prevention.

Key Features

Silent Operation– Eliminates water hammer and pipe noise
Spring-Assisted Closure– Fast response to prevent backflow
Low Pressure Drop– Streamlined flow path design
Bubble-Tight Seal– Resilient seated disc prevents leakage
Corrosion Resistance– Stainless steel components
Compact Design– Requires minimal installation space
Maintenance-Free– No lubrication required

Technical Specifications

Parameter	Specification
Size Range	DN50～DN600 (2″～24″)
Pressure Rating	PN10～PN16 (Class 150)
Temperature Range	0℃～80℃ (standard), -20℃～120℃ (extended)
Cracking Pressure	0.01～0.05MPa
Closing Time	1～3 seconds (adjustable)
Connection Types	Flanged, Wafer, Lug
Body Material	Ductile Iron (GGG50), Cast Steel (WCB)
Disc Material	Stainless Steel with EPDM/NBR sealing
Spring Material	Stainless Steel 304/316
Test Standards	ISO 5208, EN 12266, API 598

Working Principle

The HC41X valve utilizes a spring-loaded disc that opens with forward flow and closes immediately when flow stops or reverses. The spring force ensures positive closure independent of gravity or mounting position. The specially designed disc and flow path minimize turbulence, resulting in quiet operation and preventing water hammer effects.

Structural Features

Spring Chamber– Protects spring from media contamination
Guided Disc Movement– Ensures proper alignment and seating
Replaceable Seat– Easy maintenance without valve removal
Streamlined Body– Minimizes turbulence and pressure loss
External Indicator– Visual confirmation of disc position

Applications

Building water supply systems
HVAC chilled/hot water circuits
Fire protection systems
Industrial process piping
Pump discharge lines
Water treatment plants

Installation & Maintenance

Installation Requirements

Install with flow direction matching valve arrow
For vertical installation, ensure flow direction is upward
Provide adequate straight pipe runs (5D upstream, 2D downstream)
Support piping properly to avoid stress on valve body

Maintenance

Inspect annually for proper operation
Check sealing performance every 2 years
Replace seat seal if leakage exceeds allowable limits
Verify spring tension during routine maintenance

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