A valve assembly for use in regulating a fracturing fluid includes an actuating stem 64 for actuating a gate 60, a balancing stem 76, and a backseat on the stem that defines a backseat seal (104, 108, Fig. 4) when urged against a profile in the valve assembly. The backseat seal is...
释义: 全部,落座,后座,后座仰臣式,后座密封 更多例句筛选 1. The valve bonnet may now be removed. There may be a slight leakage, as the metal-to-metal backseating does not provide a drip-tight seal. 现在可以拆卸阀盖。如果金属-对-金属后座没有实现无滴漏密封,则可能会有轻微的泄漏。 www.h6688...
美 英 v.落座 网络后座;后座仰臣式;后座密封 英汉 网络释义 v. 1. 落座
APPARATUS AND METHOD FOR BACKSEATING A GATE VALVE $%^&*AU2013206554B220170713.pdf### ABSTRACT A valve assembly for use in regulating a fracturing fluid that includes an actuating stem for actuating a gate, a balancing stem, and a backseat on the stem that defines a backseat seal wh......
13. A pressure regulator, comprising: a seating surface; and a movable seat, wherein the seat is seated against the seating surface to prevent fluid fr... RW Wakeman 被引量: 0发表: 2002年 Variable bypass slow-closing check valve device In the present invention, the bypass valve for revers...
发明名称: Back-seating of rotary valve stem 发明人: NEVREKAR, VENKATESH R. 申请人: 申请日期: 1994-03-10 申请公布日期: 1995-04-18 代理机构: 代理人: 地址: 摘要: A rotary valve assembly comprising a valve body having a stem passageway in communication with the valve body cavity which...
These valves feature a unique square stem design, which enables precise control and sealing capabilities. The back-seating feature ensures reliable shut-off, preventing any leakage when the valve is closed. The combination of these features makes these valves highly efficient and suitable for numerous...
The utility model discloses an integrally-tip-back type seat which comprises a seat back, a seat board, a base and a bottom board, wherein the lower end of... 阮小晨 被引量: 0发表: 2013年 Device for the backseating of motor operated valves problem determination, valve selection, procedu...
Seating load and resultant tightness is dependent uponback pressure. 阀座密封负载和组合的紧密性是与返回压力密切相关. 互联网 Back - pressure protection is needed to prevent damage to the regulator. 需要回压保护,以防止损坏调整器. 互联网 This means that on exhaust stroke, the engine has to push ...
Low torque back seating stem for gate valve 发明人: JONES, TAYLOR L. 申请人: FMC CORPORATION 申请日期: 1993-07-12 申请公布日期: 1994-05-17 代理机构: 代理人: 地址: 摘要: A gate valve adapted for stem back seating has a stem and bonnet assembly with a rotatable bearing ring to wh...