The valve proving system LDU11... is designed for use with shutoff valves in connection with gas burners and gas appliances. In the event of inadmissible leakage, the system prevents the burner from starting up. Its function is for automatic gas valve proving (leakage test) based on the pressure proving principle.
The LDU11... system conforms to the requirements of EN 1643 covering automatic shutoff valves for use with gas burners and gas appliances to EN 161.
It is for use on gas-fired combustion plant with or without vent pipe to atmosphere.
Model
Mains voltage
t3
t4
LDU11.523A17¹)
AC 100...110 V
5 s
5 s
LDU11.523A27¹)
AC 220...240 V
5 s
5 s
t3 Filling the test space
t4 Evacuating the test space
¹) Valve opening times do not conform to EN 1643
