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 Jerguson Gages for 300 W.S.P. thru 750 W.S.P.
are available with the 10-1/4" or 12-5/8" visible
glass. Gages are equipped with polished end stems which
fit into the outlet stuffing
box connections of the valves. The stuffing boxes allow
the end stems to slip slightly to allow for a differential
in expansion rate between the drum and the gage assembly.
Numbers 103 and 123 gages are for the 300 W.S.P. and
are available in both transparent and reflex design. For
working pressures over 300 W.S.P. the use of a mica shield
between the glass and steam is recommended. Thus, the
use of reflex gages is not recommended for higher pressures. Gages
for pressures over 300 W.S.P. are offered in the transparent
type only.
Numbers 107 and 127 are for 750 W.S.P.
A mica shield protects the glass from the effects of high
Ph and erosion caused by condensate rolling down the glass. Jerguson
uses only the highest quality mica with a minimum of vegetable
stain and air inclusions to assure long life and good visibility.
All flat glass gages are constructed with chambers machined
from solid bar stock carbon steel. Tempered glasses are manufactured
under carefully controlled conditions which produce an exceptionally
strong glass, resistant to both thermal and mechanical shock.
Units are assembled and maintained at the proper clamping
load by special alloy steel bolts and nuts. Gage glasses
rest on recessed gaskets between the chamber and cover.
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Jerguson
Boiler Gages and Valves are rugged, high-quality products constructed
of the finest materials. Assemblies
are designed and built for years of dependable operation. They
meet A.B.S. and U.S.C.G. regulations and A.S.M.E. Sec. 1, code
requirements for use on fired pressure vessels.