The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 1988
Filed:
Nov. 13, 1986
L Ike Ezekoye, Wilkinsburg, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A portable test device for set point and leakage testing of a variety of sizes of pressure relief valves using the actual operating fluid under realistic test conditions includes a housing having a cylindrical bore, a main piston slidable in the bore to form at one end a test chamber, a translator piston also slidable in the bore to form at the other end a pressurizing chamber, and a spring pack biasing the pistons apart. An adapter plate mounts various size relief valves to the device with the valve inlet in communication with the test chamber. With a fixed amount of test fluid sealed in the test chamber, the pressure of hydraulic fluid introduced into the pressurizing chamber increases the pressure of the test fluid until the valve actuates. An electric immersion heater in the test chamber provides the capability for hot liquid testing and vapor testing. In the latter case, fluid in the liquid phase is introduced into the test chamber and heated to the test temperature by the immersion heater with the pressure held at a value just above, but close to, saturation pressure at the test temperature. The pressure is rapidly reduced to flash the fluid into the vapor phase and then built up again to the desired test conditions.