Dungs VDK Valve Proving System without Connector

The Dungs VDK is a valve proving system for safety shutoff valves. It verifies that both safety shutoff valves in a gas train are fully closed before a system start-up or after system shutdown when wired and interlocked to a suitable flame safeguard control. The VDK will halt the start-up sequence and prevent ignition when the VDK detects an open automatic shutoff valve or valve leakage exceeding the detection limit. Dungs VDK 200A is recommended for industrial and commercial heating applications. The VDK 200A is the means for proof of closure and normally open vent line alternative.