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US 4,073,306 AGranted
Steam trap
AssigneeYarway Corporation
InventorRobert D. Neyer
Life of this patent
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AssigneeYarway Corporation
InventorRobert D. Neyer
Estimating the term…
A steam trap in accordance with the preferred embodiment of the invention disclosed herein includes a valve body member formed with inlet and discharge passages and having a valve seat intermediate the passages that cooperates with a valve member to control the flow of fluid. The valve member is movable in a control chamber and is spaced from the control chamber to form an orifice through which fluid can flow from the inlet side of the valve member into the control chamber for controlling the operation of the valve. In accordance with one aspect of the invention, the valve member is made of a material having a different coefficient of thermal expansion than the material forming the control chamber so that the orifice size and the pressure drop thereacross vary non-linearily with temperature whereby the opening and closing of the trap can approximate the saturation curve of the fluid. In accordance with another aspect of the invention, the valve seat is formed in an insert member formed with a plurality of symmetrically arranged inlet and discharge passageways so that inlet flow through the trap is first separated, then combined and so that discharge flow is also separated and combined whereby corrosion of the valve body member is minimized.
A steam trap comprising a body including an inlet opening, a discharge opening and a valve seat formed between said inlet and discharge openings, a valve member cooperating with said valve seat to control flow from said inlet opening to said discharge opening, said valve member being movable in a control chamber and being spaced therefrom to form a first orifice through which fluid can flow to said control chamber, said valve member being formed from a material having a coefficient of thermal expansion different from the material forming said control chamber whereby the size of said orifice and the pressure differential thereacross vary non-linearily with temperature.
A steam trap comprising a body including an inlet opening, a discharge opening and an insert member between said inlet and discharge openings, a valve seat formed in said insert member and a valve member cooperating with said valve seat for controlling the flow of fluid from said inlet opening to said discharge opening, said valve member being responsive to the presence of hot condensate on the inlet side of said valve seat to allow the flow of the condensate from said inlet opening to said discharge opening and being responsive to the presence of steam on the inlet side of said valve seat to prevent the flow of steam from said inlet opening to said discharge opening, said insert member being formed with a plurality of symmetrically arranged inlet passageways communicating between said inlet opening and the inlet side of said valve seat, said insert member being further formed with a plurality of symmetrically arranged discharge passageways communicating between the discharge side of said valve seat and said discharge opening.
Dependencies are inferred from the claim text.