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. MULTI-FUNCTIONAL WATER PUMP CONTROL VALVEThe 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. API Cast Steel ValvesAn additional biasing steel layer may be included in the bi-metal strip.Instrumentation Ball Valves 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.

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