Hydraulic Silent Check Valve Prevent Reverse Flow And Water Hammer
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Hydraulic Silent Check Valve Prevent Reverse Flow And Water Hammer
Our fire protection products, including valves, pumps, and pipeline accessories, are designed to prevent backflow, control fire hazards, and ensure safe operation in commercial and industrial systems. Reliable, durable, and easy to maintain, they meet international standards and provide efficient protection for water supply, HVAC, and fire suppression networks.
Description
Ca-Fire Protection Co.,Ltd is one of the most credible manufacturers and suppliers of hydraulic silent check valve prevent reverse flow and water hammer in China. Welcome to wholesale custom made fire equipment products at competitive price from our factory. Contact us for more cheap products.
Products Description
CA-FIRE Hydraulic Silent Check Valve
Engineered for modern fluid infrastructure, the Silent Check Valve (non-return valve) serves as a critical safeguard against backflow in HVAC, industrial, and municipal water networks. The design features a precision-guided, lift-type disc that traverses a central axis, ensuring high-frequency stability and linear accuracy. To accommodate diverse operational demands, it offers interchangeable seating options-resilient rubber for zero-leakage or metallic hard-seals for heavy-duty environments. The synergy of a high-response spring mechanism and a built-in hydraulic damping chamber effectively neutralizes water hammer, delivering exceptionally quiet performance and protecting upstream motors and pumps from counter-rotation damage.
Silent Check Valve Technical Data Sheet
| No. | Item | Specification |
|---|---|---|
| 1 | Nominal Pressure (PN) | 1.0 ~ 2.5 MPa |
| 2 | Shell Test Pressure | 1.5 ~ 3.75 MPa |
| 3 | Seal Test Pressure | 1.1 ~ 2.75 MPa |
| 4 | Applicable Medium | Water, Oil |
| 5 | Working Temperature | ≤ 80°C |
Application & Advantages
Applications
The Silent Check Valve, also referred to as an anti-return or one-way valve, plays a vital role in controlling fluid flow and safeguarding equipment across multiple industries:
Building Systems: Ensures consistent one-way flow in high-rise water supply networks and HVAC pipelines.
Industrial Pipelines: Suitable for fluid networks carrying water or oil, providing reliable backflow prevention.
Pump & Motor Protection: Prevents reverse flow that could damage pumps or motors, maintaining operational safety.
High-Pressure Systems: Capable of operating efficiently in pipelines with nominal pressures from 1.0 MPa up to 2.5 MPa.
Temperature Resistance: Stable performance in systems with working temperatures up to 80°C.
Advantages
Enhanced Noise Control: The spring-assisted fast closure and lightweight disc design reduce operational noise caused by fluid reversal.
Water Hammer Prevention: Hydraulic damping chambers gradually release pressure during closure, protecting pipelines from surges and shocks.
Smooth & Stable Operation: Lift-type valve disc guided along a central axis ensures friction-free, jam-resistant motion.
Flexible Sealing Options: Choice of soft rubber seals for tight leak-proof applications or durable metal seals for high-demand conditions.
Compliance with Standards: Manufactured to PN10, PN16, and PN25 specifications, rigorously tested up to 3.75 MPa to guarantee sealing performance.
Low Maintenance & Durability: Robust construction and long service life reduce the need for frequent inspection or replacement.
Installation Requirements
1. Direction and Orientation
Flow Direction: The valve must be installed with the flow arrow (cast on the body) pointing in the direction of the fluid flow. Reverse installation will prevent flow entirely.
Horizontal Installation: When installed horizontally, the valve has no specific upward orientation; however, it is recommended to keep the nameplate visible for future reference.
Vertical Installation: The silent check valve is ideal for vertical pipelines with upward flow. For vertical downward flow, please consult the technical department as a stronger spring may be required to support the disc weight.
2. Piping and Clearance
Straight Pipe Run: To ensure stable operation and minimize turbulence/vibration, it is recommended to install the valve with a straight section of pipe at least 3 to 5 pipe diameters upstream from pumps, elbows, or other fittings.
Flange Alignment: Ensure mating flanges are parallel and correctly aligned. Using the valve to "pull" misaligned pipes into place may cause flange cracking or seal failure.
Gasket Selection: Use full-face gaskets (minimum 1/16" thickness) for PN10/PN16/PN25 connections to ensure a pressure-tight joint between the valve body and the seat.
3. Pre-Installation Preparation
System Flushing: Thoroughly clean the piping system to remove welding slag, sand, and other debris before installation. Foreign particles can damage the internal spring or prevent the disc from sealing correctly.
Inspection: Verify that the valve's pressure rating (PN10/16/25) matches the system's working pressure before bolting.
4. Tightening Procedure
Cross-Tightening: Tighten flange bolts in a graduated, diagonal (crisscross) sequence. This ensures even pressure distribution on the gasket and prevents stress concentration on the valve body.
OUR CERTIFICATE:
Our address
NO.8, YUANFENG ROAD, MEIYUAN VILLAGE, KANGMEI TOWN, NANAN CITY, QUANZHOU CITY, FUJIAN CHINA
Phone Number
+86 15960762930
alison@ca-fire.com
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