Page
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ECO-0364767
Rev: -
Installation and Operation Manual
EP Series Pro
-B
loc
®
IPDE-IOM-EP-SERIES-PROBLOC
OPERATING SEQUENCE
These valves are primarily used for double isolation of an instrument, be that a gauge or a transmitter.
The primary and secondary valves are in the open position during normal operating conditions allowing
the process pressure to enter the gauge or transmitter to perform its function to give a pressure reading.
The words Primary and Secondary are printed on the blue vinyl sleeves to aid identification.
When the gauge or transmitter need removing for calibration in a workshop, the primary valve is closed
to block the pressure, the secondary valve remains open and vent valve is opened to release the
pressure within the instrument.
