Advertisement
S
Y TO
YST M
S
CH MATICS
ymbol
Appearance
NC
hese are the symbols used in the schematics.
Name
atioAir
Main Gas Shutoff
Valve Train
Gas Cock
Solenoid Valve
(normally closed)
Fuel Orifice Meter
Adjustable Limiting
Orifice
Pressure egulator
gas pressure to a stable, usable
pressure.
Ratio Regulator
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.
clipse RatioAir v1 - Design Guide No. 115, 2/14/05
Remarks
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.
pressure regulator reduces
ratio regulator is used to control
Bulletin/
Info Guide
756
710
760
910
684
742
19
Advertisement
