Barnes & Jones 4156 Thermostatic Cage Unit for SIMMONS 1/2 X 1/2" RARE

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Barnes & Jones 4156: thermostatic cage unit for SIMMONS 1/2 X 1/2" RARE.A Barnes & Jones cage unit contains every working part of a thermostatic steam trap, including the seat, cal ibrated together under steam at the factory and locked into a stainless steel housing. It drops into the existing trap body as a one-piece, removable, testable unit, with no loose parts to align or over-tighten. Type A units serve vacuum to 25 psig, Type B to 65 psig and Types C and D to 300 psig.Manufacturer documentation: product literature. Show more