Abstract: A bimetal steam trap is disclosed, which includes a temperature-responsive valve arrangement and a bimetallic column formed of a plurality of pairs of bimetallic discs which are superposed with each other. The valve arrangement has a valve element normally biased by a spring toward its open position, which biasing force is overcome by the thermal expansion axial thrust generated by the bimetallic column when condensation temperature within the steam trap is above a predetermined level. To permit an axial displacement of the valve element in precise alignment with associated valve opening, an elongate valve member is provided at one end with the valve element, and serves to support the bimetallic column as an integrated sub-assembly.

Abstract: A thermostatically controlled trap provided that one end of a valve pushrod comes in direct contact with a ball valve when the valve pushrod is subjected to axial motion by the expansion of a thermosensitive member caused by a change in the temperature of a fluid flowing through the trap.

Abstract: A steam trap includes a casing having an inlet and an outlet, a cover secured to the casing to enclose a condensate reservoir in the casing and a trap unit having a valve closing and opening by thermal expansion and contraction of a thermoelement such as thermowax in response to temperature in the reservoir and a counter spring whose spring force acts against the thermal expansion of the thermoelement. The disclosed steam trap comprises connection means for connecting the cover and the trap unit only by relative movement therebetween and a support spring arranged between the cover and the thermoelement. The steam trap is therefore, conveniently adaptable to change in used conditions by suitable selection of trap units having various temperature characteristics previously prepared and is capable of effectively replacing its trap unit with a new one for repairing.