Installation
Algas-SDI Operation and Maintenance Manual – P/N – 54000
2-7
1. Install a UL listed shut-off valve with a Minimum 250 PSIG (17.24 bar) gas
pressure rating.
2. Install a 0-300 PSIG (0-20.7 bar) pressure gauge (or provisions for one)
ahead of the 1
st
stage regulator.
3. Install the first stage regulator as close to the vaporizer as possible, but not
further than 24” (0.6 m) from the outlet of the vaporizer. The outlet pressure
of the regulator should be set at 4 to 6 PSIG (0.3 to 0.4 bar) lower than tank
saturated vapor pressure at lowest expected temperature; this may require
periodic adjustment.
4. The second stage (or low pressure) regulator should be installed as close to
the consuming equipment as practical.
5. A line relief valve may be installed (optional) to protect the regulators from
excessively high pressure. If a line relief valve is used, set the blow pressure
at approximately 10 PSIG (0.7 bar) above the first stage regulator delivery
pressure.
VAPOR BYPASS LINE
(
see Figure 3)
1. Install a primary (first stage) regulator at the vapor outlet on top of the
storage tank. Set this regulator to deliver gas at a pressure of 2 to 4 psi
(0.14 to 0.3 bar) below the setting of the vaporizer regulator. Then if the
vaporizer is overloaded or its output pressure drops off, the regulator on top
of the storage tank will automatically take over.
2. Run a line from the regulator and tie it into the vapor service line downstream
from the vaporizer first stage regulator.
3. Although vapor bypass line is not required for proper operation, it is
recommended for all installations.
B
URNER
REGULATOR SUPPLY LINE
(OPTIONAL)
Vaporizer burners are supplied with vapor from the outlet of the vaporizer where
the least possibility of condensation will take place. In regions where there is a
problem with a high content of heavy ends in the LP gas, a separate vapor
supply line to the burner control on the vaporizer may be installed. If a separate
burner supply line is used, the following is recommended:
1. Disconnect the ¼” line at the burner regulator inlet.
2. Disconnect the ¼” line at the tee on top of the heat exchanger and plug it
with ¼ NPT plug.
3. Install a first stage regulator as close to the tank vapor outlet as possible. A
manual shut-off valve should be installed ahead of the regulator.
4. Connect the supply line from the first stage regulator to the burner regulator
at the vaporizer. Make sure that the supply is sized properly to handle
maximum input rating of the vaporizer burner(s).
Summary of Contents for 160H
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Page 42: ...Algas SDI Operation and Maintenance Manual P N 54000 5 32 APPENDIX A TECHNICAL INFORMATION...
Page 43: ...Figure 11 160H Vaporizer Replacement Parts 3 11 13 5 6 1 2 7 4 14 10 12 8 9...
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