Coliter ® Energy-Saving Silence Check Valve – PN1.0~2.5, ≤80°C, Spring-Assisted Quiet Operation for Water & Oil Systems
HC41X Energy-Saving Silence Check Valve – Ductile Iron or Stainless Steel Axial Flow Check Valve with Low-Noise, Low-Pressure Drop Design
The Coliter® HC41X Energy-Saving Silence Check Valve is an automatic inline check valve designed to prevent backflow while significantly reducing noise, water hammer, and energy loss in water supply, HVAC, fire protection, and industrial fluid systems. Unlike traditional swing check valves that cause slamming and pressure surges, the HC41X employs a spring-assisted axial flow design: when forward flow occurs, the disc compresses the spring and opens fully; during flow reversal or pump stoppage, the spring ensures rapid yet cushioned closure—eliminating sudden impacts and associated noise. The internal flow path is fully streamlined with a guide structure, minimizing turbulence and achieving one of the lowest pressure drops among check valves—contributing to system energy efficiency. A precision-machined sealing pair (typically ductile iron or stainless steel with optional NBR/EPDM elastomer) ensures reliable shut-off even at low differential pressures. Constructed from ductile iron, cast steel, or stainless steel, with a 06Cr19Ni10 (304) stainless steel spring and 2Cr13 or F304 stem, it offers long service life and corrosion resistance. Rated for PN1.0, PN1.6, or PN2.5 (1.0–2.5 MPa), it operates at temperatures up to 80°C and is suitable for water, oil, and similar media. Compliant with GB/T 21587 (design), GB/T 13927 (testing), and flange standard GB/T 9124.1, available in sizes from DN40 to DN700. As a direct replacement for conventional check valves, the HC41X delivers quiet, maintenance-free, and energy-conscious reverse-flow protection.
Installation diagram
Product Description
| DN | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 |
| L | 112 | 120 | 130 | 150 | 165 | 190 | 210 | 255 | 310 | 320 | 380 | 405 | 430 | 450 | 510 | 610 |
This valve is an automatic valve used in the water supply system to prevent the liquid in the pipeline from flowing in the opposite direction. It can effectively prevent the water hammer and noise caused by the backflow of the liquid in the ordinary check valve. The service life is the replacement product of the check valve.
Performance Standard
- Design Standards: GB/T21587
- Structure Length Standard: Enterprise standard
- Flange Standard: GB/T9124.1, GB/T1241.6
- Test Standard: GB/T13927
Main Performance Specification
| Parameter | 1.0 MPa | 1.6 MPa | 2.5 MPa |
|---|---|---|---|
| Nominal Pressure PN | 1.0 | 1.6 | 2.5 |
| Shell Test Pressure | 1.5 | 2.4 | 3.75 |
| Seal Test Pressure | 1.1 | 1.76 | 2.75 |
| Operating Temperature | <80°C | ||
| Applicable Media | Water, oil, etc. | ||
Material of Main Parts
| Part | Material |
|---|---|
| Valve Body | Ductile iron, cast steel, stainless steel |
| O-ring | NBR |
| Valve Seat | Ductile iron, cast steel, stainless steel |
| Disc | Ductile iron, cast steel, stainless steel |
| Stem | 2Cr13, F304 |
| Spring | 06Cr19Ni10 |
| Bearing | Copper alloy |
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Faq - Frequent questions
Introduction to Check valve
Coliter®’s check valves prevent backflow and water hammer in pumping stations, HVAC systems, fire protection, and municipal water networks. The series includes the H44H cast steel swing check valve for high-pressure service, H41H cast steel lift check valve for vertical flow, H44W stainless steel swing type (304/316) for corrosive media, H44X (SFCV) rubber disc silent check valve for quiet operation, HC41X energy-saving silent check valve with spring-assisted closure, and HC42X/DRVZ slow-closing silent check valve to eliminate water hammer. Available in flanged or threaded connections (DN15–DN600), rated at PN10–PN40, and compliant with GB/T 12235 and API 598 standards—ensuring reliable, maintenance-free reverse-flow protection across diverse applications.
