Taylor-Wharton RS-234 - Manual (Page 9)

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the bottom to the top of the tank. When the pressure building valve is open, and the container pressure falls below the
pressure building regulator setting, liquid is expanded to a gas and pressurizes the space of the inner container.
Pressure building is not normally required unless container pressure drops below the gas output pressure desired.
PRESSURE BUILDING INLET VALVE (V-5) - allows liquid product from the inner container into the pressure
building system. It is normally used to turn the pressure building function on and off.
PRESSURE BUILDING REGULATOR (R-1) - automatically controls flow through the circuit to maintain tank
pressure to its preset value of 75 psig (5.2 bar).
PRESSURE BUILDING ISOLATION VALVE (V-4) - serves as the outlet for the pressure building circuit and the
inlet to the ECONOMIZER REGULATOR (R-2) and the economizer circuit. Although closing the valve will defeat
both circuit functions, this valve's function is to allow isolation of circuit components for repair. The PRESSURE
BUILDING RELIEF VALVE (RV-3) will relieve pressure buildup from trapped liquid between the pressure
building regulator and the inlet valve.
Liquid Fill Procedure
WARNING:
Filling operations should take place only in well-ventilated areas. Accumulations of product gas can
be very dangerous (refer to the safety precautions in the front of these instructions). Maintain
adequate ventilation at all times.
1.
Remove protective caps from fill and vent connections. Close all valves.
2.
Connect fill hose to the LIQUID TOP FILL (V-3) connection.
3.
Check that fill hose blow-down valve on storage unit is closed.
4.
Open supply valve on the bulk storage source, and the LIQUID TOP FILL (V-3) valve and FULL
TRYCOCK & VENT (V-9) valve on the unit to be filled.
NOTE: When the fill is started, venting will vary rapidly as considerable amounts of liquid are vaporized in
cooling the lines and the tank. When the lines are cooled to liquid temperature, vapor flow will be
reduced and it will be necessary to partially close the FULL TRYCOCK & VENT (V-9) valve to
maintain the required saturation pressure.
5.
When liquid appears from the full-trycock line, first close the LIQUID TOP FILL (V-3) valve, and then the
FULL-TRYCOCK & VENT (V-9) valve.
6.
Close the bulk storage source supply valve, immediately open the hose blow-down valve to prevent rapid
pressure buildup in the filling line.
7.
Disconnect the fill hose.
8.
Close the hose blow-down valve.
Withdrawing Product from the Container
To withdraw gas from the HOSPITAL RESERVE, connect a suitable vaporizer to the VAPORIZER INLET VALVE
(V-2). A properly sized relief valve must be installed on the vaporizer. Follow the vaporizer manufacturer’s
recommendation for the proper relief valve. A suitable pressure regulator should be installed downstream of the
vaporizer. Connect the output of the regulator to the application. Open the VAPORIZER INLET VALVE (V-2) and