| 摘要 |
FIELD: gas or liquid flow rate control; pipe valves. SUBSTANCE: valve has housing 1, screw 2, handwheel 3, valve member 4, inlet union 5, seat 6, outlet union 7, seat 8, sealing members 9, 10, cross space 11 and grooves 12, 13. EFFECT: improved reliability of shutting off main lines at higher pressures, provision of stepless control of gas and liquid flow rate, reduced hydraulic losses. |
