1. Different control methods (1) The normally open solenoid valve is a solenoid valve, which is characterized by closing the solenoid valve when the coil is powered on, opening the solenoid valve after the coil is powered off, and opening the solenoid valve in the pipeline for a long time. How can the normally open solenoid valve and the normally closed solenoid valve be distinguished when the solenoid valve is occasionally closed?

1、控制方式不同

1. Different control methods

(1)常开电磁阀是一款电磁阀，其特点为线圈通电时电磁阀关闭，线圈断电后电磁阀开启，管路中的电磁阀长期开启，偶尔关闭的时候应该选用常开型。控制方式：常开;标准电压：AC(380、240、22。0、24)V、DC(110、24)。

(1) The normally open solenoid valve is a solenoid valve. Its characteristics are that the solenoid valve is closed when the coil is powered on, the solenoid valve is opened after the coil is powered off, the solenoid valve in the pipeline is opened for a long time, and the normally open type should be selected when it is occasionally closed. Control mode: normally open; International standard voltage: AC (380, 240, 22. 0, 24) V, DC (110, 24).

(2)常闭式电磁阀适用于以蒸汽为热介质，进行温度自动控制的执行机构。可对蒸汽加热器、散热器、干燥器等蒸气设备及各类温度自控仪、蒸汽定型机、蒸汽机、蒸汽回潮机等成套设备的锅炉蒸汽管道进行二位式自动控制和远程控制。

(2) The normally closed solenoid valve is applicable to the actuator with steam as the thermal medium for automatic temperature control. Two-position automatic control and remote control can be carried out for steam equipment such as steam heaters, radiators, dryers, and boiler steam pipes of various temperature automatic control instruments, steam setting machines, steam engines, steam humidifiers, and other complete sets of equipment.

2、使用方式不同

2. Different ways of use

常开型电磁阀指线圈断电时，电磁阀打开;线圈通电时，电磁阀关闭，常闭型电磁阀指线圈断电时，电磁阀关闭;线圈通电时，电磁阀打开

Normally open solenoid valve refers to the solenoid valve opening when the coil is powered off; When the coil is powered on, the solenoid valve is closed. Normally closed solenoid valve means that when the coil is powered off, the solenoid valve is closed; When the coil is energized, the solenoid valve opens

3、使用范围不同

3. Different scope of use

(1)当电磁阀需要长时间关闭时，并且关闭的时间多于开启的时间。而且持续开启的时间并不是很久时，可以选择常闭型。需要长时间开启的同时又要长时间关闭时，要选自保持式电磁阀，也就是常开常闭型电磁阀。

(1) When the solenoid valve needs to be closed for a long time, and the closing time is longer than the opening time. If the continuous opening time is not long, the normally closed type can be selected. When it needs to be opened for a long time and closed for a long time, it should be selected from the holding solenoid valve, that is, the normally open and normally closed solenoid valve.

(2)当电磁阀需要长时间开启时，并且开启的时间多于关闭的时间，而且持续开启的时间并不是很久时，可以选择常开型。或用于燃气警报系统，要选用常开型的燃气紧急切断电磁阀，带手动开启。

(2) When the solenoid valve needs to be opened for a long time, and the opening time is longer than the closing time, and the continuous opening time is not long, the normally open type can be selected. Or for gas alarm system, normally open gas emergency cut-off solenoid valve with manual opening shall be selected.

(3)有些需要应用于保护的工况，如炉、窑火监测,则不能选常开的，应选用可以长期通电型的。

(3) For some working conditions that need to be applied to safety protection, such as furnace and kiln fire monitoring, the normally open type cannot be selected, and the type that can be energized for a long time should be selected.

安装注意

Installation notes

1、安装时应注意阀体上箭头应与介质流向一致。不可装在有直接滴水或溅水的地方。电磁阀应垂直向上安装

1. During installation, the arrow on the valve body should be consistent with the flow direction of the medium. Do not install it in the place where there is direct dripping or splashing. The solenoid valve shall be installed vertically upwards

2、电磁阀应保证在电源电压为额定电压的15%-10%波动范围内正常工作

2. The solenoid valve shall be able to work normally within the fluctuation range of 15% - 10% of the rated voltage

3、电磁阀安装后，管道中不得有反向压差。并需通电数次，使之适温后方可正式投入使用

3. After the solenoid valve is installed, there shall be no reverse pressure difference in the pipeline. It needs to be powered on several times to make it warm before it can be put into use

4、电磁阀安装前应彻底清洗管道。通入的介质应无杂质。阀前装过滤器

4. Thoroughly clean the pipeline before installing the solenoid valve. The medium shall be free of impurities. Filter installed in front of valve

5、当电磁阀发生故障或清洗时，为保证系统继续运行，应安装旁路装置。

5. When the solenoid valve fails or is cleaned, a bypass device shall be installed to ensure the continuous operation of the system.

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