Interior parts are identical to standard Series GTST Radiator Traps. Replacement 'traps are a means to standardize repair parts if you have more than one make of trap in your present system. Easy to install. No moving parts to wear or require replacement. Integral trainer is standard.
Body is cast brass with integral ball joint union.
Replaceable orifice seat is also 304 stainless steel. Pressure range to 65 psig. Also available in dimensional patterns to retrofit existing old, bsolete or non-repairable brands of traps. Many of the original manufacturers models and parts for steam radiator traps are no longer available. Additionally, as existing steam heating systems expanded different traps were used creating a spare parts inventory problem.