RC = Quick Release Check Valve is used to admit a burst of compressed air into the base vacuum chamber to quickly release a work piece and to momentarily reverse flow through the vacuum filter elemnts to provide a cleaning action. Two separate air valves can be used to alternately supply compressed air to the vacuum pump or RC release check, or one 3-postion exhaust center 4-way valve.
Suffix: RCA = Assemble at position A
Suffix: RCB = Assemble at position B
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