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F600
10.3 Flow Control Valve - Model IR-170-50-bDZ
Description:
The BERMAD Normally Closed, Flow Control Valve
with Hydraulic Control is a hydraulically operated,
diaphragm Actuated control valve that limits system
demand to a constant preset maximum flow rate. It is a
Normally Closed valve, which opens in response to a
remote pressure rise command and shuts in the
absence of that command.
Pressure Differential [ P] across the Differential Pressure
Duct [1] is in direct proportion to demand. The Flow Pilot [2]
continuously senses [ P] and commands the Valve to
throttle closed should demand rise above pilot setting.
The Shuttle Valve [3] directs the pilot command into the main
Valve Control Chamber [4]. Upon pressure rise command,
the shuttle valve automatically switches, allowing
pressurization of the control chamber, shutting the main
Valve. The Manual Selector [5] enables local manual closing.
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