Algas SDI TORREXX TX100, Operation & Maintenance Manual

Page: 51 / 98

7-43
ASDI Operations and Maintenance – TX Models – P/N: 52368
TORREXX OPTIONS 7
Economy Operation
The Economy Option minimizes the electric power required to meet your vapor demand by shutting off the outlet
of the vaporizer when the natural vaporization rate of the storage tank is able to supply enough vapor to meet the
demand. A pressure sensing valve is specially developed to sense the upstream pressure. The valve opens when
the tank pressure falls below 30PSIG, and closes at 60PSIG. The pressure sensing valve is a mechanical device
and it operates independently to the electrical controls.
The Economy Option will
NOT function if a pump is used.
The pressure set-point of the TORREXX Economy Valve is nonadjustable.
The Economy is normally a factory-installed option. However, a separate Economy valve can be purchased as an
add-on in the field.
For the Economy Valve field installation kit, use ASDI PN: 41051.
Make sure that the Economy Valve is correctly installed. Verify the flow direction on the Rating Plate.
Figure 19 – TORREXX Economy valve installation
Note: Economy option cannot be used on an installation that requires a pump.
STORAGE TANK
ISOLATION
VALVE*
TANK VAPOR
PRESSURE
REGULATOR*
VAPOR BY-PASS LINE
PRESSURE GAUGE*
OUTLET ISOLATION VALVE*
VAPORIZER
REGULATOR*
LIQUID
ISOLATION VALVE”
SEAL OFF REQUIRED*
ELECTRIC SERVICE
REQUIRED*
(VAPOR)
TO LOAD
STRAINER WITH
MAGNET FOR IRON
PARTICLE PICK-UP*
ISOLATION VALVE
W/HYDROSTATIC
RELIEF*
PRESSURE GAUGE*
ASDI ECONOMY VALVE
SENSES UPSTREAM
PRESSURE (OPEN 30PSIG
CLOSED 60PSIG)
NOTES
1. LIQUID PIPING LOSSES BETWEEN THE VAPORIZER AND THE
TANK MUST NOT EXCEED THE HYDROSTATIC HEAD WHEN THE
PUMP IS SHUT OFF
2. INSTALL VAPORIZER 1
ST
STAGE REGULATOR UPSTREAM OF
THE TANK VAPOR PRESSSURE CONNECTION POINT.
3. SET 1 ST STAGE VAPORIZER REULATOR 2-4 PSIG HIGHER THAN
TANK VAPOR PRESSURE REGULATOR SET-POINT.
4. NO CHECK VALVES IN LIQUID LINE. LIQUID MUST BE ABLE TO
FLOW IN BOTH DIRECTIONS.
*BY OTHERS
ISOLATION
VALVE*