1.
Gate valves serve as efficient stop valves with flow in either direction.
闸阀可作为流体双向有效的关闭阀。
2.
Valve Disadvantages: The valve is difficult to close and requires the operator to double close the valve.
阀门的缺点：阀门难以关闭，要求操作者二次关闭阀门。
3.
Close shutoff valves and open test cocks No. 2, 3 and 4 to relieve pressure from the body of the valve.
关闭关闭阀，并开启测试旋塞2号、3号和4号，释放阀体内压力。
4.
Slowly open upstream shutoff and allow the backflow preventer to fill slowly.
慢慢开启上游关闭阀，让防回流阀慢慢注水。
5.
Install a shut-off valve in the cold water inlet line.
在冷水进水管处安装一个关闭阀。
6.
The test cock is on the inlet side of the shutoff valve.
测试旋塞位于关闭阀的进口一侧上。
7.
Prior to servicing any Watts valve, it is mandatory to shut down the water system by closing both the inlet and outlet shutoff valves.
在维修任何美国瓦茨阀门之前，必须先通过关闭进口和出口关闭阀来实现水系统的关闭。
8.
Slightly open shutoff valve No.1 and allow water to fill the tube to the top then close No.1 shutoff.
稍微开启关闭阀1号，将水注入管子直到顶部为止，然后关闭1号关闭阀。
9.
Attach hoses as shown. Bleed air from kit, close No. 2 shutoff.
如图所示接上软管。从组件上排放空气，关闭2号关闭阀。
10.
After draining, close drain valve.
排泄完毕，关闭排泄阀。
11.
automatically shutting pressure of needle valve
针形阀自动关闭压力
12.
The stem rises and lowers as the valve is opened and closed.
当阀门开启或关闭时，阀杆上升或下降。
13.
The stem position provides indication that valve is opened or closed.
阀杆的高低能够指示阀门处于开启或关闭状态。
14.
A Method to Accelevate the Closing Process of The Main Valve Opening of Pilot Relief Valve;
加快先导式溢流阀主阀口关闭过程的方法
15.
The Static Design of Closed-loop System for High-speed Switch Valve Controlled Hydraulic Valve
高速开关阀控换向阀闭环系统的静态设计
16.
Gate and globe( metal to metal) seats cannot provide bubble tight shut-off. Resilient seated butterfly valves are bubble tight by design.
闸阀和截止阀（属与金属连接）阀座不具备不透气关闭的性能。
17.
Disc– machined seating surface is mated to seat ring for positive shutoff.
(4) 阀瓣-机加工阀座表面，配置阀座环，实现积极有效的关闭。
18.
Disc ? machined seating surface is mated to seat ring for positive shutoff.
阀瓣-机加工阀座表面，配置阀座环，实现积极有效的关闭。