SEPARATING UNIT FOR MANOMETERS Russian patent published in 1997 - IPC

FIELD: measurement of pressure in pressure pipe-lines operating under subzero ambient temperatures. SUBSTANCE: characteristic feature of separating unit lies in installation of spring-loaded valve in hole 2 of case 1 which rod has shutting plate 4 and spring-loaded support 6 interacting with lid 10 which central conduit 9 is shut off by separating membrane 11. Cavity above membrane is filled with non-freezing liquid. Support 6 is provided with protrusion 8 placed asymmetrically, spring 7 has unground butts and coiling opposite to direction of thread of cover 10. EFFECT: increased reliability of separating unit. 5 cl, 1 dwg