By modulating the flow of discharge gas to the low side

verify dimensions before field application

Operating on a 120/208-240V single-phase circuit

Featuring a 4-15/16-inch copper tube and a durable brass connector with a 1/2-inch NPT outside thread

a command relay

Siemens Combustion LDU11.523A17 Valve Els PW 17895 By modulating the flow ofThe Siemens LDU11. 523A17 Valve Proving System is a critical safety controller engineered for automatic gas valve leak testing in double block valve configurations. Operating on a 110 volt AC supply, this unit utilizes a rigorous two stage pressure proving principle to verify the integrity of shut off valves before burner startup or following a controlled shutdown. During Test1, the device evacuates the test space and monitors for atmospheric pressure