Spring Check Valve

A Spring Check Valve is a critical unidirectional flow control device that utilizes an internal spring mechanism to ensure reliable sealing and rapid response. Its primary function is to automatically permit fluid or gas flow in one direction while preventing reverse flow or backflow. When forward pressure overcomes the calibrated spring force, the valve disc opens; when flow stops or attempts to reverse, the spring immediately pushes the disc against the seat, creating a tight seal. This swift action protects pumps, compressors, and piping systems from damage caused by water hammer, pressure surges, and reverse flow contamination. It is essential for maintaining system integrity in applications ranging from water supply and HVAC to industrial processing and irrigation.

Product Feature and Application

The spring check valve is an automatic valve that allows fluid to flow in one direction while preventing backflow, using a spring-loaded disc for fast, reliable operation. Its compact design, tight sealing, and low pressure drop make it suitable for water, HVAC, and industrial piping systems. Widely used in pumps, pipelines, and equipment protection, it ensures system safety, prevents water hammer, and maintains stable flow.

Product Parameter

1. Nominal Pressure: 1.6 MPa  

2. Working Medium: Water, Non-corrosive and Non-flammable Gases

3. Operating Temperature: -10 °C ≤ T ≤ 120 °C  

4. Thread conforms to ISO 228 standard

Product dimension

Installation Guidelines

1.Clean and prepare the piping system thoroughly before installing the valve.

2.Before installation, remove any protective end caps and inspect the valve ports and seating surfaces to ensure they are clean.

3.Provide adequate support for the valve to avoid stress from connecting piping.

4.Confirm that the valve’s pressure and temperature ratings are suitable for the intended service conditions.

5.Before placing the valve into service, cycle it fully from open to closed to verify smooth operation.

6.After installation, check that the packing nut is properly tightened.

Note 1: Spring Check Valve can be installed in horizontal or vertical piping with upward flow, or in intermediate orientations, provided the hinge pin on swing-type check valves remains horizontal. Install check valves at an adequate distance from pump outlets or other turbulent flow sources. Refer to the relevant technical bulletin for details.

Note 2: Some Spring Check Valves may include internal packaging to protect the disc during shipping. Remove all such packaging material before installation.

Operating Instructions

Check valves operate automatically and do not require manual intervention.

Inspection and Maintenance

1.Routine inspection and preventive maintenance are generally not required, aside from occasional adjustment of stem packing and periodic cycling of the valve from open to closed.

2.If a packing leak occurs, tighten the packing nut clockwise by about a quarter-turn—or until leakage stops—to increase sealing pressure on the stem packing. Never repack a valve while it is under system pressure.

3.When replacing the valve stem, also replace the packing material.

Replacement Parts

Under normal operating conditions, replacement parts are seldom needed. Recommended spare parts for each valve type include: Disc, holder, and hinge assembly.

When ordering parts, please provide the valve’s figure number, size, required part, and approximate age.

Maintenance

1.Regular cleaning. To avoid the influence of impurities and sediment in the pipeline on the check valve, it is necessary to regularly clean the all-copper horizontal check valve and the inside of the pipeline.

2.Note alternating cold and hot water operations. Frequently opening and closing the check valve will cause damage, so alternating cold and hot water operations should be avoided.

3.Note pressure. When using the all-copper horizontal check valve, attention should be paid to the pressure situation inside the pipeline, as excessively high pressure will have an adverse effect on the check valve. In short, the all-copper horizontal check valve is a commonly used device in pipeline systems, and its use and maintenance are very simple and easy. In actual use, users should operate and maintain according to the above requirements to ensure the use effect.