These devices are required to isolate the compressor for the same reasons they are required for reciprocating compressors. Discharge Check Valve (Each Stage) In reciprocating…

Slowdown valves must be installed in centrifugal compressors for the same reasons as in reciprocating compressors. They must be designed with more care than those…

Speed Controller A speed controller is needed in conjunction with the surge control system. A new head-capacity curve is established for each speed, as shown…

Flare Valve As suction pressure increases or discharge pressure decreases, the compressor head requirement will decrease and the flow rate will increase. A flare valve…

A recycle valve is needed for surge control as well as for the conditions listed above for reciprocating compressors. At constant speed the head-capacity relationship…

Surge is the most important process design consideration for centrifugal compressors. The surge condition occurs when the compressor does not have enough flow to produce…