The Dungs VPS 504 is a valve proving system for DMV series automatic 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 VPS will halt the start-up sequence to a burner if it detects an open automatic shutoff valve, thus preventing ignition under potentially dangerous conditions.
The VPS 504 is recommended for industrial and commercial heating applications. Various model types are: 504 06: 120 Vac, 504 06: 24 Vdc, 504 04: 110 Vac and 504 04: 230 Vac.
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UR, CSA and FM – for S06 VPS 120 Volt AC Model
CE and CSA – for S06 VPS 24 Volt DC Model
CE Approved – for S04 VPS 110 and 230 Volt AC Models
VPS means Valve Proving System
221073 – VPS 504 S06 Valve Proving System 120 Vac
224983 – VPS 504 S05 Valve Proving System 24 Vdc
221327 – VPS 504 S04 Valve Proving System 110 Vac
219881 – VPS 504 S04 Valve Proving System 230 Vac