Algas-SDI Operations and Maintenance Manual – P/N – 54702
2-3
2.
Major Components
1 –
FLOW METER
The Flow Meter monitors the volumetric flow of gas through the pipe.
2 -
AIR FLOW CONTROL VALVE
The Air Flow Control Valve is used to adjust the flow of air to match the flow of
vapor given a fixed mixing ratio.
3 -
MANUAL OUTLET SHUT-OFF VALVE
Manual Shut-Off Valve allows system to be shut off manually at the outlet pipe
and allows the operator to manually control the outlet flow rate when starting the
system.
4 -
MANUAL INLET SHUT-OFF VALVE
Allows system to be shut off manually at each inlet pipe to isolate mixer from the
rest of the system.
5 -
CHECK VALVE
The Check Valve ensures the flow of gas moves in one direction.
6 -
PRESSURE TRANSMITTER
The Pressure Transmitter relays information to the remote control box to prevent
low LPG pressure from forcing lean mixtures.
7 -
TEMPERATURE TRANSMITTER
The Temperature Transmitter determines if LPG gas vapor is at safe operating
temperature. The system will shut down if LPG vapor temperature is close to
dewpoint. The chart at the end of this section has the dewpoints for propane, N-
butane and Isobutane.
8 -
VAPOR REGULATOR
This regulator sets the downstream mixed gas pressure.
9 -
AIR REGULATOR
This regulator sets the air pressure to the flow control valve. A typical differential
is for air to be 7.5 psi above the gas pressure.
10 -
AUTOMATIC SAFETY SHUT-OFF VALVE
The Automatic Safety Shut-Off Valve is located at the outlet and vapor inlet and
will automatically close if there is an alarm condition, lack of electricity or if the air
supply is low.
11 -
STATIC MIXER
This device induces blending of two separate streams of gases into a consistent
mixture.
