Steam trap structure including a bi-metal strip for actuating valve means to control passage of steam through the steam trap in accordance with the temperature within the steam trap. Needle & Gauge Valves The bi-metal strip may be straight or may have an arcuate portion on one end thereof and is constructed of alternate layers of steel and brass adjacent pairs of which may be connected together. In a modification all of the steel and brass layers may be connected together. Gate ValvesAn additional biasing steel layer may be included in the bi-metal strip. The steam trap of the invention further includes multiple coarse and fine strainers adjacent to the outlet valve and unique outlet valve structure including a flanged valve seat and cooperable conical valve member adapted to be self mounting in an opening in the steam trap.MULTI-FUNCTIONAL WATER PUMP CONTROL VALVE An indicator arrangement for visual detection of the failure of a steam trap installed in a system including a device to use the steam and a system to collect condensed steam emitted from the device where the present invention provides a temperature responsive element, which changes color upon exposure to a selected temperature range, lower than the temperature of the steam in the system to which the trap is connected, and where the element is attached to the outlet side of the steam trap, so that the element changes color when the temperature of the outlet reaches the selected temperature indicating that the steam trap has failed to operate properly.

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