PRESSURE GAGE ISOLATOR Russian patent published in 1999 - IPC

FIELD: protective devices for pressure gages used for pressure lines operating at sub-zero ambient temperatures. SUBSTANCE: device has bottom 8 of case 1 with stepped central hole of two diameters; sleeve 4 accommodating spring-loaded valve 5, sealing member 11 with control member 11 of its disk 9 facing smaller-diameter hole is mounted in larger-diameter hole 3 of case bottom; valve upper stem 6 contacting cover 14 is passed through smaller-diameter hole; its lower stem placed inside spring 10 is passed through central bottom hole of sleeve 4 and communicates with medium under measurement. EFFECT: improved reliability of device operating at sub-zero temperatures. 1 dwg