应用范围：
它广泛应用在航天、船舶重工、石油化工、工业炉窑、锅炉、城市给排水、采暖空调、消防设备、干燥设备、食品医疗设备、清洗设备、景观喷灌、水厂等管道系统中。

产品特点：
参照各系列电磁阀中的特点应用，手动柄开关可以在电磁阀线圈无电或烧毁时，实现电磁阀打开和关闭。

工作原理：
参照各系列电磁阀中的工作原理使用。

工作原理：
常闭型：当电磁阀线圈不通电或烧坏，手动可以打开阀门。但手动处于打开状态时阀不能自动控制。
常开型：当电磁阀线圈不通电或烧坏，手动可以关闭阀门。但手动处于关闭状态时阀不能自动控制及线圈通电和断电阀都不能打开。

Applications:
It is widely used in aerospace, shipbuilding Heavy Industry, petrochemical, industrial furnaces, boilers, urban drainage, heating and air conditioning, fire fighting equipment, drying equipment, food and medical equipment, cleaning equipment, landscape irrigation, water and other piping systems.

Features:
The series solenoid valve in the light of the characteristics of application, the manual switch can handle without electricity in the solenoid valve coil or burned, the realization of the electromagnetic valve is opened and closed.

How it works:
Reference to the series of solenoid valves used in the works.

How it works:
Normally closed: When the solenoid valve coil is not energized or burned, you can manually open the valve. However, when the valve is turned on manually not automatically control.
Normally open: When the solenoid valve coil is not energized or burned, you can manually close the valve. However, when the valve is manually turned off and can not automatically control the valve coil is energized and power can not be opened.