Eclipse Combustion RatioMatic RM Series - Key to System Schematics; Component Symbols and Descriptions

Eclipse RatioMatic v3.00 - Design Guide No. 110, 4/98
A-2
RatioMatic
Main Gas Shutoff
Valve Train
Gas Cock
Solenoid Valve
(normally closed)
Fuel Orifice Meter
Adjustable Limiting
Orifice
Pressure Regulator
Eclipse Combustion, Inc.
strongly endorses NFPA as a
minimum
Gas cocks are used to
manually shut off the gas
supply on both sides of the
main gas shut-off valve train.
Solenoid valves are used to
automatically shut off the gas
supply on a bypass gas system
or on small capacity burners.
Fuel orifice meters are used to
measure gas flow.
Adjustable limiting orifices are
used for fine adjustment of gas
flow.
NC
KEY TO SYSTEM
SCHEMATICS
These are the symbols used in the schematics.
ALO
Adjusting
Screw
CCW for
more gas
Cap
756
710
760
910
684
742
Symbol Appearance Name Remarks Bulletin/
Info Guide
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.
A pressure regulator reduces
gas pressure to a stable, usable
pressure.
Ratio Regulator