Eclipse RatioAir v1 - Design Guide No. 115, 2/14/05
Component Selection
Eclipse Combustion can help in the design of a main gas shut-
off valve train that satisfies the customer and complies with all
local safety standards and codes set by the authorities within
that jurisdiction. Contact Eclipse Combustion for further
information.
Note:
Eclipse Combustion supports NFPA regulations (two gas shut-
off valves as a minimum standard for main gas shut-off
systems).
Valve Train Size
Fuel pressure supplied to the ratio regulator inlet must be within
the range specified in the RatioAir data sheet. The valve train
should be sized sufficiently to provide the specified pressure.
Warning:
Do not operate RatioAir burners with gas inlet
pressure less than the minimum listed on the
RatioAir Data Sheet. Lower gas inlet pressures
may cause the ratio regulator to remain fully
open at lower inputs as the burner transitions
from low to high fire. This could result in the
possible accumulation of unburned fuel in the
burner which, in extreme situations, could cause
a fire or an explosion.
17
Step 6:
Main Gas Shut-Off
Valve Train
