An electric signal device which control open and close is installed. We supply power as per 24V, when the valve close 25%, the mistake close signal will be sent by this electric signal device. Then the signal will be transmit to fire protection center.

■ Capability parameter

Nominal diameter	DN50-60mm
Nominal pressure	1.0/1.6/2.5MPa
Working temperature	-10℃-80℃
Seal pressure	2.0 times nominal pressure
Body resistance pressure	1.0 times nominal pressure
Applicable medium	Water, oil, gas