Dungs 267095 DMV-ZRD(LE)/612 with Proof of Closure combines all the features of DMV-ZRD(LE)/6 plus, valve 1 incorporates overtravel and a proof of closure switch which is factory mounted and set.The DUNGS DMV-ZRD(LE)/612 is recommended for industrial and commercial heating applications where two safety shutoff valves in series that modulate between two firing rates and applications that require overtravel and a proof of closure switch. The DMV-ZRD(LE)/612 is suitable for natural gas, propane, butane, air and other inert gases.Aluminum body; Inlet, intermediate and outlet side taps (G1/8 ISO 228); Inlet gas strainer installed in the housing upstream valves (23 mesh screen); DMV-ZRD - V1 fast opening & closing (<1 s), V2 fast opening & closing (<1 s); DMV-ZRDLE - V1 fast opening & closing (<1s); V2 slow opening 20s MAX @ 70F & fast closing (<1 s); V2 on both models feature a manually adjustable flow rate (<10-100%); 100% duty cycle; Refer to Flow Curves for Body Selection. Conduit Adapter (240671), DIN connector (210319), and flanges must be ordered and priced separately. Code requirements vary. FM requires visual indication on 1" and larger safety valves. The visual indicator, (VI) 266949 meets this requirement. The visual indicator must be ordered separately for valve 2. Factory mounted and calibrated proof of closure switch: SPDT 10 A resistive, 8 FLA, 48 LRA @ 120 Vac; NEMA type 4; - 40 Deg F to + 150 Deg F ( - 40 Deg C to + 65 Deg C); Switch incorporates visual indication of valve (opened & closed).
Dungs DMV ZRD 612 Series 