TY - JOUR
AU1 - Krasil'shchikov, V.
AB - Chemical and Petroleum Engineering, Vol. 38, Nos. 9–10, 2002 PIPELINE FITTINGS V. M. Krasil’shchikov The major deficiencies of shutoff valves are: • loud noise (bad acoustics) during operation of the shutoff valve, especially at the time of opening and closing of the gate; • large overall dimensions and mass of the manually controlled drive; • high impact loads due to the sealing surfaces of the gate, which reduces leak-tightness and service life of the valve; • relatively low transmissive (flow throughput) capacity and response speed of the valve. Solution to some of these problems was offered by the Dutch firm Mokveld [1]. In their catalog there are designs of straight-flow shutoff valves having a balanced (load-relieved) shutting device (slide valve) whose inner chamber is sealed off relative to the output chamber as the flow section of the valve is overlapped (shut off). The valve is opened by a pneu- mohydraulic drive and closed by a spring. In these valves, the pneumohydraulic resistance is much less due to streamlining of the shutting device. The gate is made leak-tight by a specially designed radial rubber seal. The shutting device is relieved from the pressure of the medium because the diameters of 
TI - Valve of Improved Reliability
JF - Chemical and Petroleum Engineering
DO - 10.1023/A:1022000218072
DA - 2004-10-10
UR - https://www.deepdyve.com/lp/springer-journals/valve-of-improved-reliability-HRXg3C0YLO
SP - 538
EP - 542
VL - 38
IS - 10
DP - DeepDyve
ER -