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Compressor valves are often described as the heart of a compressor. At high speeds or with
high pressure differentials, valves can fail due to flutter and high impact forces. Valves
must also be able to stand up to harsh operating conditions such as sour gas and dirty gas
applications. The plate valve from CPI is specifically designed to overcome these issues
while at the same time, still exhibit the advantages of CPI's ring valve designs. The
valve disc is of non-metallic thermoplastic design and is proven to provide more efficient
seals over much longer durations than traditional metal valve discs. Thermoplastics are also
extremely resistant to the adherence of small particles, sand, and debris found in dirty
gas operations. Metal sealing plates on the other hand will nick, wear, or crack under
similar conditions. In order to mitigate the adverse effects of flutter as well as constant
high speed impact, a second, non-sealing metallic dampening disc is used. The dampening disc
is heat treated for hardness and either floats or is lightly spring loaded between the main
sealing disc and the valve body. ) When the valve opens, both discs accelerate rapidly
but the brunt of the impact is absorbed by the hardened secondary disc. The secondary
disc also dampens out any possible flutter the primary disc would exhibit due to high
speed or high differential
pressure bounce.