Coliter ® Flanged Check Valve, 1.6MPa, -20–110°C, GB/T 15530.1 Flange, Cast Iron Body
ZH5001 Flanged Check Valve – Spring-Assisted Silent Check Valve for Water, Oil, and Saturated Steam Systems
The Coliter® ZH5001 Flanged Check Valve is a cast iron silent check valve designed to prevent backflow in medium-to-large pipeline systems handling water, oil, or saturated steam. Featuring a spring-assisted disc mechanism, it ensures rapid, quiet closure to eliminate water hammer and protect downstream equipment. Rated for a nominal pressure of 1.6 MPa, it operates reliably within a temperature range of -20°C to 110°C. The valve body is epoxy-coated for enhanced corrosion resistance, and flange dimensions comply with the Chinese standard GB/T 15530.1. Available in sizes from DN40 to DN150, it is ideal for pump outlets, municipal water networks, heating systems, and industrial pipelines where maintenance-free, automatic backflow prevention is critical.
Installation diagram
Product Description
| DN | n-ØC | K | L | H |
| 40 | 4-Ø18 | 110 | 132 | 75 |
| 50 | 4-Ø18 | 125 | 144 | 80 |
| 65 | 4-Ø18 | 145 | 163 | 90 |
| 80 | 8-Ø18 | 160 | 187 | 105 |
| 100 | 8-Ø18 | 180 | 210 | 115 |
| 125 | 8-Ø18 | 210 | 237 | 130 |
| 150 | 8-Ø23 | 240 | 267 | 160 |
Technical Specifications
Nominal Pressure: 1.6 MPa
Working Medium: Water、Oil, Saturated Steam
Working Temperature: -20℃ ≤ t ≤ 110℃
Flange Dimensions: GB/T 15530.1
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Faq - Frequent questions
Introduction to Check Valve
Coliter® supplies a complete range of check valves to prevent backflow in potable water, heating, and industrial systems. The series includes the ZH1001 horizontal brass check valve, ZH2001 vertical brass check valve, ZH3001 telescopic meter inlet check valve (with compression fitting for easy water meter installation), and ZH5001 flanged cast iron check valve for larger pipelines. All models feature spring-assisted silent closure to eliminate water hammer, lead-free brass or epoxy-coated cast iron bodies, and compliance with GB/T 17241 standards. Rated up to PN16 (1.6 MPa) and suitable for temperatures up to 120°C. Ideal for residential risers, pump outlets, and municipal water networks—ensuring reliable, maintenance-free backflow protection.
