Dungs VDK 200A S02 Valve Monitoring System, part number 211224:

 Technical Overview

• Model: VDK 200A S02
• Part Number: 211224
• Function: Valve proving system for automatic shut-off valves
• Voltage: 110 VAC
• Frequency: 50 Hz
• Max Operating Pressure: 360 mbar
• Ambient Temperature Range: -10C to +60C
• Degree of Protection: IP40
• Release Time: 10 to 26 seconds (depending on test volume and inlet pressure)
• Max Test Volume:  20 liters
• Test Principle: Pressure build-up via internal motor pump (35–40 mbar above inlet pressure)