The 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.
- Release Signal Timing: min.10 s, max. 26 s.
- Maximum test volume 0.14 ft³
- “RUN” or “ALARM” condition is indicated by an LED.
- Electrical connection at screw terminals via 1/2“ NPT conduit connection.
- Detectable leakage rate (each valve): 0.2 to 1.4 ft³/h.
- No field adjustments or settings required.
- Max. Operating pressure: 7 PSI
- Prüfvolumen I: ø 0.14 ft³
The VPS 504 is recommended for industrial and commercial heating applications. Some authorities having jurisdiction accept the VPS in lieu of “proof of closure” when integrated with the preignition system and/or in lieu of a vent valve. It can also be used as a valve seat tightness check when used within its capabilities.
The VPS is suitable for dry natural gas, propane, air, and inert gases. NOT suitable for butane or any gas mixture containing 60 % or more of butane. A “dry” gas has a dew point lower than +15 °F and its relative humidity is less than 60 %.
DUNGS is a synonym for safe and clean gas combustion. In close cooperation with our clients we develop and manufacture innovative system solutions for the thermal and process heating industry and gas engines. Innovations are not an end in themselves for us. They have to meet the requirements and offer a direct added value. We are a valuable original equipment manufacturer for producers of atmospheric and forced draught burners, condensing boilers, premix burners, gas engines and industrial process installations.
VPS Valve Proving System