过滤活塞式缓闭止回阀

产品描述 Product Description

进口过滤活塞式缓闭止回阀具有开启和关闭速度调控的止回阀作用，可视具体工况配合现场调节最佳的开启和关闭速度，可防止水锤及水击的产生，达到除噪的效果 

The imported filter piston type slow closing check valve has the function of regulating the opening and closing speed of the check valve. The optimal opening and closing speed can be adjusted according to the specific working conditions and on-site conditions, which can prevent the generation of water hammer and water hammer, achieving the effect of noise reduction

压力等级：PN10、PN16、PN25

规格：DN40~DN500 

工作原理 working principle

过滤活塞式止回阀运行平稳可靠，消除压力余波。安装在高层建筑、消防给水系统以及其它给水系统的管道上。当水泵开启时，水通过导管进入中腔，推动活塞上升，主阀开关。当水泵停止工作时，活塞在回水压力下降，由于进口处针型阀比出口球阀流量小，因此活塞缓慢下降，主阀也随之缓慢关闭。

The filter piston check valve operates smoothly and reliably, eliminating pressure ripple. Installed on pipelines of high-rise buildings, fire water supply systems, and other water supply systems. When the water pump is turned on, water enters the middle chamber through the conduit, pushing the piston up and the main valve on and off. When the water pump stops working, the piston's return water pressure drops. Due to the smaller flow rate of the needle valve at the inlet compared to the outlet ball valve, the piston slowly drops, and the main valve also slowly closes

全开状态 Fully open state

当水泵启动后，阀门进水口压力上升，压力水一方面推动主阀瓣开启，另一方面通过导管系统进入活塞下腔，而活塞上腔的水通过导管系统泄入压力级的阀门出水口，而阀门在二合力的作用下缓慢开启

When the pump is started, the pressure of the valve inlet rises, and the pressure water on the one hand pushes the main valve disc to open, on the other hand, it enters the piston lower chamber through the catheter system, and the water from the piston upper cavity leaks into the valve outlet of the pressure level through the catheter system, and the valve slowly opens under the action of the two resultant force.?

全闭状态 Fully closed state

当水泵停机后，阀门中的水流速度降低，在接于近零时，主阀板在弹簧力和自身重力作用下快速关闭，而阀后的压力水通过导管系统返回到活塞上腔，并推动固定在阀杆上的小阀板缓慢关闭。

When the pump is shut down, the water flow speed in the valve is reduced. At nearly zero, the main valve plate is quickly closed under the action of spring force and its own gravity, while the pressure water behind the valve is returned to the piston upper cavity through the catheter system, and then the small valve plate fixed on the valve stem is pushed to be slowly closed.

结构和主要零件材质 Structure and main component materials

多功能过滤活塞式控制阀系列在主阀内部装有过滤网结构与多功能水力控制阀+Y型过滤器的配套装置相比，大大节省阀门的成本和安装空间。阀门的驱动装置采用双腔控制结构，即活塞下腔与下游处单独隔出一个控制室。本系列阀门是通过主阀内双腔与外装的导阀、导管、调节阀等连接组合成使用场所、目的及功能不同的阀门。此外，还在活塞上腔的阀盖上配备了调节螺杆装置，通过调节螺杆可以适当的调节流量或者关闭阀门。

The multifunctional filtering piston control valve series is equipped with a filter mesh structure inside the main valve, which greatly saves the cost and installation space of the valve compared to the supporting device of the multifunctional hydraulic control valve and Y-shaped filter. The driving device of the valve adopts a dual chamber control structure, which means that the lower chamber of the piston is separated from the downstream by a separate control room. This series of valves are assembled into valves with different use places, purposes and functions through the connection of the main valve's internal double chamber and the external pilot valve, conduit, regulating valve, etc. In addition, an adjusting screw device is also equipped on the valve cover of the piston upper chamber, which can adjust the flow rate or close the valve appropriately.

阀顶设有行程调节装置，可根据管道压力流量的大小调节主阀盘的开启高度，从而可达到最佳的使用效果。在此位置可设置开度指示装置或信号反馈装置。

The valve top is equipped with a stroke adjustment device, which can adjust the opening height of the main valve disc according to the pressure and flow rate of the pipeline, thus achieving the best use effect. At this position, an opening indication device or signal feedback device can be set

采用主副密封结构，主密封阀盘随介质的压力的大小自动打开和关闭。副密封阀盘受控制室介质的影响，随水锤峰值到达时间的长短自动关闭，从而消除水击现象。

Adopting a main and auxiliary sealing structure, the main sealing valve disc automatically opens and closes with the pressure of the medium. The secondary sealing valve disc is affected by the medium in the control room and automatically closes with the time when the water hammer peak reaches, thereby eliminating the phenomenon of water hammer

安装示意图 installation diagram