The Two-Stage Dual Modular Valve (DMVZR) combines two safety shutoff valves in one compact housing, which can be wired independently or in parallel. Valve 2 incorporates two stages, which can be set at two different firingrates.Both firingrates are field adjustable and can modulate from high to low during burner operation.
Valve 1(V1) of the DMV-ZRD and DMVZRDLE series is fast opening and fast closing. Valve 2 (V2) is a two stage valve. V2 of the DMV-ZRD is fast opening, while V2 of the DMV-ZRDLE is slow-opening for smoother light-off. Max. flow adjustment onV2provides variable main flowonboth models.
Internal profiles and compact design optimize flow and provide a low pressure drop. Three body styles reduce inventory. Directly mounting the following accessories creates a compact valve train without additional piping: pressure regulator, high and low gas pressure switches, valve proving system, and vent line adapter.
- Max. Operating pressure: 7 PSI / 5 PSI
- Nominal diameter: NPT 1/2 - NPT 2
The DMV-ZR is recommended for industrial and commercial heating applications, where two automatic shutoff valves and modulating between two firing rates during burner operation are required. The DMV-ZR Dual Modular Valve two stage is suitable for dry natural gas, propane, butane, air and inert gases.
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.