中央空调管道用阀门的选型设计

Selection and design of valve for central air conditioning pipe

1、冷冻水机组、冷却水进出口设计蝶阀；

1, chilled water unit, cooling water inlet and outlet design butterfly valve;

2、水泵前蝶阀、过滤器，水泵后止回阀、蝶阀；

2. Butterfly valve, filter, pump check valve and butterfly valve.

3、集、分水器之间压差旁通阀；

3, the pressure difference bypass valve between the set and the water separator.

4、集、分水器进、回水管蝶阀

4, set, water separator inlet and backwater pipe butterfly valve

5、水平干管蝶阀；

5. The horizontal dry pipe butterfly valve;

6、空气处理机组闸阀、过滤器、电动二通或三通阀

6, air handling units gate valves, filters, electric two or three-way valves.

7、风机盘管闸阀（或加电动二通阀）

7, fan coil valve (or electric two - pass valve)

注：一般采用蝶阀时，口径小于150mm时采用手柄式蝶阀（D71X、D41X）；口径大于150mm时采用蜗轮传动式蝶阀（D371X、D341X）。

Note: when the butterfly valve is generally used, the handle type butterfly valve (D71X, D41X) is adopted when the caliber is less than 150mm, and the worm gear type butterfly valve (D371X, D341X) is used when the caliber is greater than 150mm.

选用暖通阀门的注意事项

Attention to the selection of HVAC valves

1、减压阀、平衡阀等必须加旁通阀；

1, the pressure relief valve, the balance valve and so on must be added by the bypass valve;

2、全开全闭最好用球阀、闸阀；

2, the best use of the ball valve, gate valve;

3、暖通空调管道尽量少用截止阀；

3, the heating and air conditioning pipeline as little as the cut-off valve;

4、阀门的阻力计算应当引起注意；

4, the calculation of the resistance of the valve should be paid attention to.

5、电动阀一定要选好的。

5, the electric valve must be selected.

给水管道上使用的阀门的选型原则

Selection principle of valve used in water supply pipe

1、需调节流量、水压时，宜采用调节阀、截止阀；

1, when regulating flow and water pressure, adjusting valve and globe valve should be adopted.

2、要求水流阻力小的部位（如水泵吸水管上），宜采用闸阀；

2, where the flow resistance is small, such as pump suction pipe, gate valves should be adopted.

3、安装空间小的场所，宜采用蝶阀、球阀；

3, installation of small space, butterfly valve and ball valve should be adopted.

4、水流需双向流动的管段上，不得使用截止阀；

4. No pipe cut-off valve should be used on the pipe with two-way flow.

5、口径较大的水泵，出水管上宜采用多功能阀。

5, the larger diameter of the pump, the outlet pipe should be multi-functional valve.