关于对电动装置输出转速的确定，在阀门对其启闭时间没有严格要求时，应尽量选用较慢的速度。
Output speed of electric installations on the determination of its opening and closing the valve when the time is not strictly required, should try to use a slower speed.
同时，可以利用调整阀瓣的自重、弹簧的弹力以及阀瓣的底孔大小来确定阀门的开启压力和启闭时间。
Meanwhile, the flap valve can be used to adjust weight, spring tension and the bottom outlet valve flap valve opening size to determine the pressure and open and close time.
可实现快速启闭，某些结构的启闭时间仅为0.05 ~ 0.1s，以保证能用于试验台的自动化系统中。
Headstock can be achieved quickly, some of the gate structure of time is only 0.05 ~ 0.1s, in order to secure the test-bed for the automated system.
当阀片两侧的压差随时间变化时，阀片的启闭与压差的变化之间存在一定的相位差，有可能引起泄漏甚至反向流动。
When the pressure difference changes with time, a phase shift will occur between the transient pressure difference and displace of valve flap, which could cause leakage and even reverse flow.
拦污栅与启闭机、检修闸门与启闭机的连接，采用了易于存放又避免拆卸拉杆、明显节省操作时间的起重环链。
The connections between trash rack and hoist as well as between service gate and hoist are achieved by hoisting chain that is apt to place and is time saving without tearing down pull rod.
通常以能保证密封要求的启闭次数来表示，也可以用使用时间来表示。
Usually sealed to ensure that the number of required headstock that can also be used to indicate the use of time.
启闭速度是用阀门完成一次开启或关闭动作所需的时间来表示。
The speed of the valve gate is open or closed to complete a move to indicate the time required.
启闭速度是用阀门完成一次开启或关闭动作所需的时间来表示。
The speed of the valve gate is open or closed to complete a move to indicate the time required.
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