产品描述 Product Description

进口隔膜式流量控制阀用于高层建筑和工矿企业以及医药、食品等领域的管路系统中，保持下游预定的流量，不随系统压力的变化而改变，具有稳流效果好，册压管能向极敏感的导阀发出信号，反应快速而准确：调节操作方便，只需调节导阀的调节螺钉，就能获得精确稳定的出口流量。

The imported diaphragm flow control valve is used in pipeline systems in high-rise buildings, industrial and mining enterprises, as well as in fields such as medicine and food. It maintains the predetermined downstream flow rate and does not change with changes in system pressure, with good flow stabilizing effect. The pressure control pipe can send signals to extremely sensitive pilot valves, and the response is fast and accurate. The adjustment operation is convenient, and precise and stable outlet flow can be obtained by adjusting the adjustment screw of the pilot valve

压力等级：PN10（出口压力调节范围0.1-0.8MPa）

                 PN16（出口压力调节范围0.2-1.4MPa）

隔膜式：DN50～DN350 

活塞式：DN50～DN800 

流速范围：0.5～5m/s

工作原理 working principle

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板开启，另一方面通过导管系统进入膜片（活塞）下腔，而膜片（活塞）上腔的水通过导管系统泄入压力低的阀门出水口，而阀门在二合力的作用下缓慢开启。

After the water pump starts, the pressure at the valve inlet rises. On the one hand, the pressure water pushes the main valve plate open, and on the other hand, it enters the lower chamber of the diaphragm (piston) through the conduit system. The water in the upper chamber of the diaphragm (piston) is discharged into the outlet of the low pressure valve through the conduit system, and the valve slowly opens under the combined force of the two forces

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膜片（活塞）上腔，并推动固定阀杆上的小阀板缓慢关闭。

After the water pump stops, the water flow velocity in the valve decreases. When it is close to zero, the main valve plate quickly closes under the action of spring force and self gravity, while the pressure water behind the valve returns to the upper chamber of the diaphragm (piston) through the conduit system and pushes the small valve plate on the fixed valve rod to slowly close.

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

1.为了更有效地防止水锤的产生，水力控制阀将控制室设计成双腔体形式。根据不同的用途可以将两个腔室彼此隔离或相通，以实现缓开、缓闭或速闭等辅助功能。在一定程度上阻碍水锤的产生或功缓解水锤的力度，保护阀后的其他设备不受损坏。除此之外，阀盖与上腔室连为一体，使得阀盖、上腔室、阀杆、阀盘成为整体，只要松开阀体上的连接螺栓，即可将其一并取出，方便维修及更换易损件。

  In order to more effectively prevent the generation of water hammer, the hydraulic control valve designs the control room in a dual chamber form. According to different purposes, two chambers can be isolated or connected to each other to achieve auxiliary functions such as slow opening, slow closing, or quick closing. To some extent, it hinders the generation of water hammer or alleviates the force of water hammer, protecting other equipment behind the valve from damage. In addition, the valve cover is connected to the upper chamber as a whole, making the valve cover, upper chamber, valve stem, and valve disc a whole. As long as the connecting bolts on the valve body are loosened, they can be taken out together for easy maintenance and replacement of vulnerable parts.

2.隔膜式水力控制阀阀杆两头导向的结构，采用中段长节距导向，避免了阀盖和阀座上的导向孔因加工或安装不同心，导致阀杆运动受阻、易卡死现象，中段导向套与上阀体整体浇铸，加工精度得到保证，同时在与阀杆的接触面间加一铜质衬套，保护阀杆表面不被磨损、擦毛，使阀杆运动自如、平稳、灵活。

  The structure of the diaphragm type hydraulic control valve stem is guided at both ends, adopting a mid section long pitch guidance, which avoids the phenomenon of the valve stem movement being blocked and easily stuck due to uneven machining or installation of the guide holes on the valve cover and valve seat. The mid section guide sleeve and upper valve body are cast as a whole, ensuring machining accuracy. At the same time, a copper sleeve is added between the contact surface with the valve stem to protect the surface of the valve stem from wear and burrs, making the valve stem move freely and smoothly flexible

3.隔膜式水力控制阀的阀盖、上腔室、阀杆、阀盘可整体取出，方便维修及更换橡胶密封面、O形环等易损件。阀盖与上腔室之间的隔膜采用尼龙网布加强型橡胶隔膜，耐剪切应力使用安全可靠。内件包括上腔式、阀杆、阀盘、弹簧、螺栓等，除了不锈钢件以外都进行了无毒喷塑处理，具有良好的防腐性能。

  The valve cover, upper chamber, valve stem, and valve disc of the diaphragm hydraulic control valve can be taken out as a whole, making it convenient for maintenance and replacement of vulnerable parts such as rubber sealing surfaces and O-rings. The diaphragm between the valve cover and the upper chamber is made of nylon mesh reinforced rubber diaphragm, which is safe and reliable for shear stress resistance. The internal components, including the upper chamber, valve stem, valve disc, spring, bolt, etc., have undergone non-toxic spray molding treatment except for stainless steel parts, which has good anti-corrosion performance.

4.隔膜式水力控制阀的阀盘采用间隙组合结构，即阀杆和阀盘孔之间有一定的间隙；阀盘用螺钉和挡块相对固定在阀杆之间并留有1-2毫米间隙，这样阀盘在垂直于阀杆的平面上有一定的自由度，可以弥补由于加工或装配误差造成阀座密封面与阀杆不垂直的缺陷，实现了零泄漏

  The valve disc of the diaphragm hydraulic control valve adopts a clearance combination structure, that is, there is a certain gap between the valve stem and the valve disc hole; The valve disc is relatively fixed between the valve stem with screws and stop blocks, leaving a gap of 1-2 millimeters. This allows the valve disc to have a certain degree of freedom in the plane perpendicular to the valve stem, which can compensate for the defect of the valve seat sealing surface not being perpendicular to the valve stem due to machining or assembly errors, achieving zero leakage.

基本流量压差特性曲线图（Basic Flow and Differential Pressure Characteristic Graph）

安装示意图