DUNGS Dual Modular Safety Shutoff Valves with Two-stage operation DMV-ZR Series
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 firing rates. Both firing rates 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
Model Versions :
- DMV-ZR…/602 : Two normally closed safety shutoff valves in one housing. V1 and V2 are fast opening, fast closing. (Two stage and adjustable max flow with V2.)
- DMV-ZRDLE…/602 : Two normally closed safety shutoff valves in one housing. V1 fast opening, fast closing. V2 is a two stage, slow opening, fast closing valve. (Adjustable max. flow and adjustable initial lift with V2.)
| Type | Pipe Size / thread | Flange Sizes |
| DMV-ZRD(LE)701 | 1/2″ – 1″ NPT | 1/2″ |
| DMV-ZRD(LE)701 | 1/2″ – 1″ NPT | 3/4″ |
| DMV-ZRD(LE)701 | 1/2″ – 1″ NPT | 1″ |
| DMV-ZRD(LE)702 & 703 | 1″ – 2″ NPT | 1″ |
| DMV-ZRD(LE)702 & 703 | 1″ – 2″ NPT | 1 1/4″ |
| DMV-ZRD(LE)702 & 703 | 1″ – 2″ NPT | 1 1/2″ |
| DMV-ZRD(LE)702 & 703 | 1″ – 2″ NPT | 2″ |
* * For other configurations and spare parts, please consult JATI
