ID: CS403IT-8DD4
FISHER CS403IT-8DD4 COMMERCIAL LOW-PRESSURE REGULATOR WITH MONITOR 2" FNPT
The Fisher Type CS403 combines the operation of a conventional two-regulator wide-open monitor set into one body. The Integral True-Monitor™ is installed on the inlet side of the body and serves to throttle flow and maintain an acceptable downstream pressure in the case where the Primary regulator fails to regulate downstream pressure. During normal operation the Integral Monitor is in a wide-open state as its setpoint is set higher than the primary regulator. If the downstream pressure should rise to the setpoint of the internal monitor due to loss of pressure control by the primary regulator, the integral monitor will assume control and regulator the flow to the downstream system. See the Type TM600 Instruction Manual for additional details of operation. If a Token relief is present, the token relief will relieve a small amount of gas to the atmosphere as an indication that the Integral monitor is controlling the downstream pressure.
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