Datasheet

ii
Key to System Schematics
Symbol Appearance Name Remarks
Bulletin/
Info Guide
RatioMatic
Main Gas Shut-Off Valve Train
Eclipse strongly endorses NFPA
as a minimum.
756
Gas Cock
Gas cocks are used to manually
shut-off the gas supply on both
sides of the main gas shut-off
valve train.
710
Solenoid Shut-Off Valve
(Normally Closed)
Solenoid valves are used to
automatically shut off the gas
supply on a bypass gas system or
on small capacity burners.
760
Fuel Orifice Meter
Fuel orifice meters are used to
measure gas flow.
910
Adjustable Limiting Orifice
Adjustable limiting orifices are
used for fine adjustment of gas
flow.
Pressure Regulator
The pressure regulator reduces
gas pressure to a stable, usable
pressure.
684
Ratio Regulator
A ratio regulator is used to control
the air/gas ratio. The ratio
regulator is a sealed unit that
adjusts the gas flow in ratio with
the air flow. To do this, it measures
the air pressure with a pressure
sensing line, the impulse line. This
impulse line is connected between
the top of the ratio regulator and
the burner body.
742
Pressure Taps
Impulse Line
Main gas
shut-off
valve train
NC