部件名称 Part

材质 Material

阀体材料 Body

球墨铸铁 EN-JS1049

阀胆材料Piston

不锈钢 Stainless steel WN1.4571

弹簧材料 Spring

不锈钢 Stainless steel WN1.4404

密封圈 Seal

丁腈橡胶 NBR

通径

Diameter

压差范围（Kpa）Differential Pressure Range

流量范围 (m³/h)

Flos Range

通径

Diameter

压差范围（Kpa）Differential Pressure Range

流量范围 (m³/h)

Flos Range

DN50

15-150

3.2-30

DN250

15-150

3.2-390

20-210

4.0-36

20-210

4.0-468

33-330

5.0-46

33-330

5.0-598

90-900

8.0-75

90-900

8.0-975

DN65

15-150

3.2-30

DN300

15-150

3.2-600

20-210

4.0-36

20-210

4.0-720

33-330

5.0-46

33-330

5.0-920

90-900

8.0-75

90-900

8.0-1500

DN80

15-150

3.2-30

DN350

15-150

3.2-690

20-210

4.0-36

20-210

4.0-828

33-330

5.0-46

33-330

5.0-1058

90-900

8.0-75

90-900

8.0-1725

DN100

15-150

3.2-60

DN400

15-150

3.2-900

20-210

4.0-72

20-210

4.0-1080

33-330

5.0-92

33-330

5.0-1380

90-900

8.0-150

90-900

8.0-2250

DN125

15-150

3.2-90

DN450

15-150

3.2-1110

20-210

4.0-108

20-210

4.0-1332

33-330

5.0-138

33-330

5.0-1702

90-900

8.0-225

90-900

8.0-2775

DN150

15-150

3.0-150

DN500

15-150

3.2-1410

20-210

4.0-180

20-210

4.0-19、692

33-330

5.0-230

33-330

5.0-2162

90-900

8.0-375

90-900

8.0-3525

DN200

15-150

3.2-240

DN600

15-150

3.2-1920

20-210

4.0-288

20-210

4.0-2304

33-330

5.0-368

33-330

5.0-2944

90-900

8.0-600

90-900

8.0-4800

在△P<△pmin时，在压差控制范围之下时，压降低于驱动自动平衡阀芯动作在最小值，阀胆不运动，阀门全开，起到固定孔板的作用，此时Cv值最大且保持不变，由于Q=Cv√△P,因此流量Q随压差△P的增加而增加。（如图一）
When △P<△pmin,below the differential pressure controlling area,the pressure drop is lower than the minimum value that driving the valve core of the balancing valves requires.The piston keeps still and the valve will fully open so as to fasten the orifice plate.At this moment,Cv value rises to the highest and remains constant.Bevause Q=Cv√△P,flow rate Q will the increase of the △P.(see Diagram 1)
注：在安装有电动阀调整流量的情况下
Remark:Electric valves are installed to regulate the flow rate,

在△pmin<△P<△pmax时，在压差控制范围之内，阀胆随压差的变化而运动，从而改变过流面积，Cv值随之改变，△P增加时Cv值减小，由于Q=Cv√△P因此流量保持在设定值不变（如图二）
When △pmin<△P<△pmax,within the differential pressure controlling area,as the change of the differential pressure,piston works and flow area and Cv value change consequetly.When △P increases,Cv value decreases.Because Q=Cv√△P,the flow rate systains at a setting value and keeps unchanged.(see dianram2)
注：电动阀全开的情况下
Remark:Electric valves fully open.

当△P>△pmax时，在压差控制范围之上时，阀胆完全被压缩，过流面积仅为最小设计通道，只有顶部的固定流量孔通流，流量随压差变化，阀门起到固定孔板作用，Cv值最小且保持不变，由于Q=Cv√△P，因此流量Q随压差的增加而增加，（如图三）
When △P<△pmax，over the differential pressure controlling area,piston is fully compressed and flow area minimizes to the minimum designing flow path.The flow can only go through the fixed flow orifices and changes with the change of differential pressure.At this time,valve can help fasten the orifice plate and Cv value drops to the lowest and remains constant.Because Q=Cv√△P,flow Q grows with the invrease of differential pressure.（See Diagram3）
注：电动阀全开的情况下
Remark:Electric valves fully open.

安装于暖通系统的多台并联设备之后，如制冷机、锅炉、换热器、水泵的后端，保持每台机组按额定流量和设计工况运行，不会因过流或流量太小使设备发生损坏。
Installed after the parallel equipments in heating ventilating system,such as chiller,boiler,heat changer,and pump to ensure every equipments work under fated flow and designed conditions,avoiding damage caused by over flow or low flow.

安装于冷却系统中多台并联冷却塔的前端，保证每台冷却塔按设计流量运行，避免因流量过大而造成超负荷。
Installed in front of parallel cooling towers in cooling system to ensure every cooling towers work umder designed flow rate,avoiding overload caused by over flow.

安装于区域供暖系统回水管上，保证各用户区域供水量按需分配，避免区域间冷热失调。
Installed in return pipe in heating system to ensure the water is distributed to the users according to need and avoid temperature disorder.

安装于空气处理机组或风机盘管后端，对机组起到屏蔽作用，避免因系统压力波动引起机组的流量变化。
Installed after air handling unit or fan coil unit to function as screen. Avoid flow change caused by pressure fluctuation in the system.

安装于供水管网的支路上，避免因某一区域用水量大而引起其他区域的供水不足。安装于其他需要维持水力平衡的管网中，如农业灌溉系统、工业管网系统等。
Installed in the bypass of the water supply network to avoid shortage of water supply caused by over water consumption in some area.Insralled in other network which requires sustaining hydraulic balance,such asa agricultural irrigation system,and industral ductwork,etc.