Barnes & Jones 4117 Type A Thermostatic Cage Unit for Erwel R30 1/2" and 4 other models

Barnes & Jones 4117: Type A thermostatic cage unit for Erwel R30 1/2" and 4 other models.

Fits: Erwel R30 1/2"; Spirax Sarco H 1/2"; Spirax Sarco H Old Style 1/2"; Spirax Sarco Midget 1/2"; Spirax Sarco TH25 1/2".

A Barnes & Jones cage unit contains every working part of a thermostatic steam trap, including the seat, calibrated 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.