Valve Proving Systems 219881

Dungs Valve Proving System VPS 504 S04

The Dungs VPS 504 S04 is an automatic valve proving system that tests the leak-tightness of both safety shut-off valves in a gas train before burner start-up (and, on some systems, after shutdown), per EN 1643 / DIN 1643. It pressurizes the pipeline section between the two valves (up to 4 litres test volume) and monitors for pressure decay over a roughly 10–26 second test cycle; if either valve is leaking, the system locks out and blocks ignition (red Lockout indicator), while a successful test allows the burner sequence to proceed (yellow Run indicator). Rated for up to 500 mbar (50 kPa) inlet pressure, IP54 enclosure, screw-terminal (S04) connection, supporting 230V/240V AC 50Hz supply with a 4A SPDT output relay. Commonly used as the integrated proving module within Dungs flanged gas train assemblies. Manufactured by Dungs, Germany.