SPRD旁通阀是当各种区域风门自动关闭时用在区域系统中，可以在管道系统中增加空气压力盒速度。
The SPRD is used on zone systems when the automatic closing of various zone dampers can create an excessive increase in air pressure and velocity throughout the duct system.
在放气阀关闭时使用这个功能，可能会导致系统压力过大或超过压力安全阀的设置压力。
Using this feature with the Purge Valve closed can result in over pressurizing the system or exceeding the Pressure Safety Relief Valve setting.
应用空化，液体铁锤和压力顶峰可能用在流动速度方面的变化在液压系统里发生，例如一阀门或者泵的快关闭起停。
Application Cavitation, liquid hammer and pressure peak may occur in hydraulic systems with changes in flow velocity, e. g. fast closing of a valve or pump starts and stops.
首先关闭位于进水阀之前的手动关闭阀，然后将系统压力降到12psi(或其他预设压力)，几个小时后，观察系统的压力上升状态。
First close manual shutoff located before the fill-valve, then draw system pressure down to 12psi (or other preset pressure) and observe system for pressure buildup several hours later.
当系统运行压力降低至安全阀的回座压力时，主蒸汽安全阀自行关闭，停止排放，从而对主蒸汽系统的管道和设备起安全保护作用。
When the system pressure drops to the return pressure, the security valve will be closed and stop discharging, in the way of which the pipelines and equipments of the steam system will be protected.
当系统运行压力降低至安全阀的回座压力时，主蒸汽安全阀自行关闭，停止排放，从而对主蒸汽系统的管道和设备起安全保护作用。
When the system pressure drops to the return pressure, the security valve will be closed and stop discharging, in the way of which the pipelines and equipments of the steam system will be protected.
应用推荐