Non-Return Valves

BM Engineering Supplies provides a wide range of Non-Return Valves for water, wastewater and pumping applications. A Non-Return Valve (also known as a check valve or one-way valve) works as a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. These two-port valves have two openings in the body, one for fluid to enter and the other for fluid to leave. Available in a wide range of sizes and costs, Non-Return Valves are generally small, simple and inexpensive.

Non-Return Valves Brands


Inoxpa’s Non-Return Valve 72700 prevents fluid from flowing backwards and ensuring that it flows in only one direction. This Inoxpa Non-Return Valve can be used to prevent the loss of prime of the pump and water hammer. It is used in the food processing, cosmetics, pharmaceutical and chemical industries, as well as in the beverage, wine and oil production.

It offers the following features and benefits:

  • Available sizes: DN 25/1″ to 100/4″
  • Easy assembly/disassembly with the clamp
  • Reduced size design
  • Connections: weld OD / weld DIN / RJT / IDF / Tri-Clamp / DIN 11851.
Non return valve for water


Zwick Armaturen has 30 years’ experience in designing and manufacturing valves of the highest standard. Their check valve TRI-CHECK combines all the benefits of their TRI-CON series of valves in a Non-Return Valve. It features a triple-offset design with a wide seat angle and a true cone in cone, as well as ensuring no rubbing while moving and absolute zero leakage performance. The Check Valve Series TRI-CHECK has proved to be the ideal Non-Return Valve for water pump applications.

It offers the following features and benefits:

  • Statically held gasket
  • No pinned disc design
  • Hydraulic damper and counter weight
  • Suitable as a combined check and isolating valve or as a check valve.


A non-return valve should be installed if you are looking for a valve that allows media to flow in only one direction. A non-return valve can be fitted to ensure that a media flows through a pipe in the right direction, where pressure conditions may otherwise cause reversed flow.

The terms ‘check valve’ and ‘non-return valve’ are interchangeable and are actually the same thing. Both non-return and check valves can stop backflow from occurring, and when used in drinking water applications have to be tested and meet a very strict criterion. This ensures damaging fluids are not able to be drained back into drinking water systems.