The “never fail” check valve!

It is crucial to protect your critical assets such as pumps, compressors or other expensive machinery located within your plant’s pipework.

Check valves are commonly used to ensure no back-flow, surge pressure or hammer effects could damage your assets and increase downtime along with costly repairs or replacements.

How to select the right ball check valves ?

Swing check, piston check, dual plates, etc.

Each check valve type has its Pros & Cons, however common issues brought up by users are :

– moving parts being seized due to debris or reaction to chemicals

– slam/hammer effect when closing

– loss of tightness causing pumps priming issues\

– vibration / noise issues in the pipeline

The above issues are mainly caused by a wrong selection of the valve type or inequation of the design & materials with the process conditions.

Also, most of the types of check valves described above are suitable for “clean service”.

Dirty Service Selection:

When it comes to “dirty” service which may include grit, sand, slurry, sludge, pulp or any viscous or solids carrier fluid, your best option is to:

1 – Have the flexibility on the material selection to adjust the chemical compatibility of the design with your service : each process is different and contains various concentration of acids or reacting agents

2- Reduce the moving parts number to a minimum ; the more moving parts you have in your design, the more chances of these being caught up by large solids exist

3- Have a low to maintenance-free design ; you don’t want to get your hands in these harsh fluids on a frequent basis


– Ductile Iron

– Carbon steel

– Stainless steel 316 & 316L

– Duplex, Super duplex, Hastelloy C276

End connections type:

– Flanges to ANSI B16.5, ISO7005 (DIN), JIS B2220, AS4087, AS2129

– Threaded ends

– Grooved type


Maximum pressure rating: 50 bars

Maximum size : DN600


– Mining and mineral processing

– Power generation

– Sand and gravel

– Chemical and soda ash

– Pulp and paper

– Environmental and Effluent

More info : 

A WA-owned and operated private company.

Leave a Reply

Your email address will not be published. Required fields are marked *