Abstract: This invention pertains to a float and thermostatic steam trap with an improved mechanism less subject to failure than previous designs. In this design the venting and trapping functions are served by the same valve and a thermostatic actuator acts on the float or float linkage when temperature is below a predetermined value. In normal operation the float controls the discharge of condensate and the thermostatic actuator is out of contact with the float assembly and therefore is free to move. When the temperature within the trap housing drops below the predetermined value, the thermostatic actuator engages the float assembly, forces the valve opening and raises the float above the condensate level. This allows the removal of condensate and of the noncondensible gasses from the trap. This design eliminates the stressing of the thermostatic actuator by static or vibration loads at high temperatures and thereby reduces the fatigue failure of the actuator.

Abstract: A valve ring arrangement is disclosed in which the corrosion sensitive parts of shut-off valves, control valves and condensate-removal devices are kept out of contact with condensate accumulations. Also disclosed are float and bucket-type condensate-removal devices which are protected against shutdown corrosion by means of automatically draining them during shutdowns.

Abstract: A luminaire provided with an inflatable gasket for airtight and dustproof sealing of its interior and for simultaneously gripping the cover of the luminaire in closed position while the gasket is inflated. The sealing forces act in a plane which is essentially perpendicular to the plane of symmetry of the cover. Untight closure of the cover is signaled by the visible displacement of the cover in case of deflation of the gasket.