Wafer-type check valve at the pump outlet
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For a certain project, the pressure at the pump outlet is 0.6 MPa, and the pipe diameter is around 400 mm. The client requires the use of wafer-type check valves, which have many years of operational experience behind them. I once worked with a large enterprise in China, and they stated that \"double-check valve types cannot be used in the inlet and outlet pipelines of pumps and compressors, nor in pipelines operating under harsh conditions.\" ” Yuan Fang, what do you think?
Sir, our catalytic unit pump outlets generally use wafer-type check valves.
We use many clamp-type fittings on-site; in the high-pressure areas these are used at the compressor buffer tank inlet, the compressor outlet, and the outlet of the high-speed hydrogen feed pump. They have been in use for 8 years now with no issues.
Shouldn’t a slow-closing check valve be used?
At the compressor outlet, it is specified that H44 valves cannot be used. However, I have seen a company where the designers had no idea what check valves with slow-closing function were, and they kept using ordinary H44 check valves; it seems nothing went wrong over the years. The design is based on extensive engineering experience; not every mistake leads to an accident, but if we are aware of certain mistakes, we should try our best to avoid them.
Lord Di, what does it have to do with Guan Bao and Hei Tan? What are the disadvantages of wafer-type check valves?
Lord Bao was asking what Yuan Fang thought, so I replied to Lord Bao. The wafer-type check valve has shown no problems so far in use.
Are wafer-type check valves cheaper?
Do wafer-type valves have higher safety requirements?
Whether it’s cheap or not depends on the material and brand. Don’t expect too good check and sealing performance from wafer-type ones.