I’m the manufacturer of the G-TEC Torch Booster and I’d like to
respond to recent questions and postings regarding my products.
First, with respect to James Binnion’s comments about safety, he is
absolutely correct.
During the past year in New York City five jewelers have exploded
their gas meters because they connected their torches directly to the
city gas line without flashback arrestors. The huge difference in gas
pressure between city gas, 1/4 psi, and O2, anywhere from 10 to 70
psi, makes it relatively easy to cause a flashback.
When such a flashback occurs the gas meter literally explodes like a
hand grenade, a significant gas leak is created and sometimes there
is a fire. Fortunately no one has been hurt yet, but gas is turned
off to the building…in one case gas was shut off for 8 months.
The city gas utility studied potential solutions, including all
known flashback arrestors, checkvalves, etc and concluded:
-
No flashback arrestor or check valve promoted as working with low
pressure natural gas is 100% effective in stopping a flashback
-
Standard 2 psi flashback arrestors such as are sold through
Gesswein, Rio Grande and other leading distributors are 100%
effective in stopping a flashback. As James noted, the problem is
that these flashback arrestors require higher pressure gas flow to
work.
A G-TEC Torch Booster lifts gas pressure enough to make the standard
2 psi flashback arrestor work, and give the jeweler the gas flow
needed at the torch. In New York City our Torch Boosters have been
approved by the Fire Department, NYC Department of Buildings and
Consolidated Edison and are recognized as the solution to this
problem. We are on a path that will lead to Torch Boosters being, if
not required, at least very strongly recommended to insure that
flashback arrestors can be installed and will perform their safety
function properly. New York City jewelers will be hearing more about
this in the coming weeks.
If anyone would like to contact me directly I would be happy to
share more d etails about our experience with flashbacks in NYC than
space permits here.
Second, while a torch directly connected to the city gas line will
work (please note that US OSHA regulations require a flashback
arrestor be used with an oxy-fuel torch) many manufacturers recommend
higher than 1/4 psi fuel gas flow for their torches. The Smith Little
Torch suggests up to 4 psi fuel pressure when used with a # 4 tip, up
to 8 psi with a # 7 tip, etc. Recommended pressures for a Hoke torch
range between 2-5 psi.
While a torch may work with 1/4 psi natural gas it will work better,
and the jeweler will get better performance, when s/he can set gas
pressure according to the manufacturer’s recommendation.
Third, with regard to using a Torch Booster in a home studio…these
products are certified by CSA-International, the same organization
that certifies your hot water heater, gas dryer, oven and other gas
appliances. They are safe to use in a home studio and in fact are
welcomed in places like shopping malls that prohibit propane and
other cylinder gases. The gas flow with these units is the same as if
you turned on all the stovetop burners in the kitchen. Just make sure
the system is installed by a person qualified to work on the natural
gas line.
Finally, an earlier posting suggested letting the system run for 5
minutes before using it. In fact the system is at full pressure and
ready to go as soon as it is turned on and there is no waiting time
required.
People who have purchased Torch Boosters cite three things they like
about them:
-
They get better torch performance of high-pressure natural gas
-
They like the safety aspect of being able to install a flashback
arrestor that doesn’t block gas flow
-
The system is quiet, convenient and easy to use
If anyone has a specific question about a G-TEC Torch Booster please
contact me directly, or make a further posting here and I will answer
it.
If you would like to see a Torch Booster they will be exhibited at
the JA Show Jan 21-23 in NYC, Catalog In Motion in Tucson Feb 2-5,
MJSA in NYC March 18-20 and the Bench Conference in Buffalo April
26-29.
Ed Howard
G-TEC Natural Gas Systems