valves's Tech-parameter:

Flow-rate: 0-4m3/h

Working pressue: 0-20000Pa

Pressure loss: ≤50Pa(4m3/h)

Working voltage: DC 2.5-5V

Working current: ≤80mA(3.0V)

External tightness: No leakage(P=20KPa)

Internal tightness: ≤120Pa (Air-pressure 5000Pa, 3min)

Continue working: >10000times

Valve open time: ≤1S(4V)

Valve close time: ≤200mS

Temperature range: -10--40°c

Service life: 10 years 

Max. Valve body resistance pressure: >80KPa 

Application meters: 1.6/2.5/4m3  domestic gas meter