Diaphragm actuated valves designed for either continuous or intermittent operation which provide accurate, repetitive pressure control
THE ECONOMIZER CIRCUIT
The economizer back pressure regulator is set from 10 to 25 psi (.70 to 1.76 kg/sq cm) above the
set pressure of the pressure build-up regulator. When no gas is being used and heat leakage in
the tank causes a gas pressure build-up, the excess pressure is by-passed into the final vaporizer
line to conserve gas rather than allow the safety valve in the pressure build-up circuit to relieve
the excess gas into the atmosphere.
Five types of back pressure valves are available for this circuit: the Type FRM, low flows,
max. 600 psi (42.18 kg/cm2
FRM-2, medium flows, max. 250 psi (17.58 kg/cm2
FRM-2 (HP) high
pressure, medium flows, max. 400 psi (28.12 kg/cm2
FR, large flows, max. 400 psi (28.12 kg/ cm2 and the FR-6, max. 600 psi (42.18 kg/cm2
