초록 ▼

High-pressure, micrometering valves requiring low-actuating torque are combined in a lightweight, portable pressure calibration console, housed in a common valve block. A manual pressure valve and a manual vent valve connect compressed gas from an internal storage cylinder to pressure measuring gage

High-pressure, micrometering valves requiring low-actuating torque are combined in a lightweight, portable pressure calibration console, housed in a common valve block. A manual pressure valve and a manual vent valve connect compressed gas from an internal storage cylinder to pressure measuring gages or transducers to be calibrated. Automatically actuated isolation valves connect and disconnect a vernier balancing cylinder assembly, permitting fine manual adjustment of calibration pressures as high as 10,000 psi. Positive shutoff combined with low-torque, fingertip control and non-jamming closure are provided by the frictionally-engaged valve components.

대표청구항 ▼

A portable pressure calibration console having a housing incorporating a compressed gas storage cylinder having a fill port, and an outlet port including a pressure regulator, at least one test port for connection to pressure sensing equipment to be calibrated, a pressure transducer display assembly

A portable pressure calibration console having a housing incorporating a compressed gas storage cylinder having a fill port, and an outlet port including a pressure regulator, at least one test port for connection to pressure sensing equipment to be calibrated, a pressure transducer display assembly connected to measure and display to the user the pressure existing at the test port, a control valve assembly including a pressure valve alternatively connecting and disconnecting the storage cylinder pressure regulator outlet to the test port by way of a pressure conduit, and a vent valve alternatively connecting and disconnecting the pressure conduit and a vent port for exhausting the pressure conduit, the pressure valve and the vent valve each incorporating a threaded valve housing and a threaded needle shaft, axially advanced and retracted by its threaded engagement with the valve housing, a ring-shaped polymer valve seat, the needle shaft having a tapered needle point engageable with the valve seat, a manual control knob keyed to the needle shaft, and a low-friction washer sandwiched between the manual control knob in its valve-closed position and the valve housing, whereby closing of the vent valve and opening of the pressure valve supplies compressed gas to the pressure conduit and the test port whose pressure is measured and displayed by the transducer display assembly, with the tapered needle point and cooperating polymer valve seat of the pressure and vent valves providing precise pressure control and positive shutoff with low actuating torque, and the low-friction washers avoiding jamming of the control knobs in their closed positions.