Rapid closing of the valve is accomplished fitting a heavy spring.
安装一根粗弹簧就可以达到迅速关闭阀门的目的。
Fluid Energy Controls surge Stop surge Suppressors are designed to dampen the pressure surges caused by rapid closing and opening of flow control valves in any liquid handling system.
浪涌电压抑制器用以抑制关闭和开启控制阀时产生的压力波动。
Protection device: rapid rolling door is arranged at the bottom of the photoelectric device, touch the obstacles in the process of closing down, stop immediately rebound.
保护装置：快速卷门门柱底部装有光电装置，在关闭的过程中触及障碍物，立即停止下降反弹回升。
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