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
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