Jerguson Gauges and Valves are rugged, high-quality products constructed of the finest materials. They meet A.B.S. and U.S.C.G. regulations and A.S.M.E. Sec. I, code requirements for use on fired pressure vessels.
Tubular gage classes up to 250 WSP
Jerguson Tubular Gage assemblies represent years of experience in the manufacture of gage cocks for industrial steam services. The valves have union bonnets. Stems are quick closing and equipped with levers and equalizing plate for chain operation. Both stems have backseating knobs, seats are renewable and regrindable.
Flat glass gauges
Jerguson Gauges for 300 W.S.P thru 750 W.S.P. are available with the 101/4 " or 125/8" visible glass. Gauges 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 gauges 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 gauges is not recommended for higher pressures. Gauges for pressures over 300 W.S.P. are offered in the transparent type only.
Numbers 187 and 127 are for 758 WSP
A mica shield protects the glass from the effects of high Ph and erosion caused by condensate rolling down the glass. Jerguson used only the highest quality mica with a minimum of vegetable stain and air inclusions to assure long life and good visibility. AII flat glass gauges 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 mechanica1 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.