How to distinguish fire pneumatic and electric fire pneumatic valves

in many types of fire prevention in the pneumatic valve and how can one eye visual difference between fire pneumatic valve, pneumatic valves and electric fire then the difference is the manufacturer to teach everyone how to faster.
usually fire pneumatic valve:
usually fire pneumatic valve mainly include: fusible tube fuse action, signal back, manual action, manual reset features, in ventilation system of air pipe through fire partition, the place such as compared to general across the room, when the temperature of the air flow in the pipe of more than seventy degrees, close the end of the meeting.
electric fire pneumatic valve:
electric fire pneumatic valve mainly include: fusible tube fuse action, signal back, manual action, manual reset feature, in the smoke, twofold functions of local ventilation is usually compared to general, the effect of ventilation pipe in play, normally when fire occurs, fire alarm system through linkage, fire pneumatic valve makes the corresponding open may be closed, then the effect of the exhaust pipe ducts are played.
the above is the manufacturer to sort out fire the difference between the pneumatic valve and electric fire pneumatic valve.