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Installation Instructions
Spring Check Valves Product Range

Last Updated

April 29, 2021

Flowflex reserve the right to alter the product ranges and specifications associated with its products without prior notice

For applications where flow in only one direction is required, Flowflex's Spring Check Valves are available. Our Disc Check Valve designed for a smooth action; the addition of a central guide offers further improved reliability when compared to traditional unguided disc check valves.

Our Brass Spring Check Valves have an advantage in that they can be installed in an either horizontal or vertical position. As upstream pressure increases, the spring-loaded disc is forced open, lifting the disc from its seat to allow flow through the valve.

Applications

  • Domestic
  • Commercial
  • Industrial

Preliminaries

Unpack and check that the valve is correct for its intended usage. The valve must be compatible with the system design, pressure & temperature requirements and must also be suitable for the fluids it is intended to carry. Check that the flow paths are clear and that the threads are free from debris. To ensure ease of operation, maintenance and repair, the location of the valve should be decided during the system design phase. Valves should be appropriately supported to prevent strain on the valve and the pipework.

Equipment

Materials
  • Copper Pipe
  • Spring Check Valve
Tools
  • Adjustable Spanner
  • Pipe Cutting Tool
  • Internal & External Pipe Deburring Tool

Installation

Check Valve and Tube

Check Valve and Tube

Spring Check Valves can be installed both vertically and horizontally and the valve needs to be closed during installation

It is important that your pipe is the correct size and length. Failure to do so could impact on the quality of your jointing.

Pipe Thread Preparation

Pipe Thread Preparation

Ensure that suitable pipe supports are used close to and either side of the valve to avoid bending the valve and remove any excessive stresses. Ensure that the pipe thread is the correct length for the valve, too short risks leakage, too long risks damaging the valve.

Ensure any compound or PTFE tape is used sparingly and applied to the male thread only and not on the female thread.

Connecting

Connecting

When connecting the pipe ensure the pipe is on the correct perpendicular axis and that the threads are engaged correctly when tightening the valve. The valve should be held in position with a spanner or wrench while the connecting pipes are screwed in. Ensure the spanner or wrench is fitted to the body end, to the valve hexagon / octagon flats, adjacent to the joint.

Do not over tighten when making the connection.

Other Considerations

Tightening Guidance for Spring Check Valves
Torque Settings
Size Torque
1/2" 75 Nm
3/4" 100 Nm
1" 125 Nm
1 1/4" 160 Nm
1 1/2" 200 Nm
2" 250 Nm
2 1/2" 300 Nm
3" 370 Nm
4" 465 Nm

Testing

We recommend that all systems are throughly tested upon completion. Whenever possible, completed systems should also be flushed to remove debris.

Maintenance

Regular maintenance is the most efficient method of ensuring longer term uninterrupted operational efficiency. It is recommended that within the 1st year that valves should be visually inspected for leaks and that a complete manoeuvre cycle is carried out to check the valve and prevent scale from forming every 3 months. Where a valve is working under extreme conditions it is recommended to check it more frequently.

Hydraulic Installations

In hydraulic based installations, the system may be tested to 1.5 times the working pressure of the system. If higher test pressures are required, then please contact us for further advice.

Any Questions?

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