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1 Double solenoid valve Control and safety combination valve Servo pressure controller - / 7. Printed in Germany Rösler Druck Edition 0.08 Nr Technical description The DUNGS multiple actuator DMV-SE... consists of valves and a servo pressure controller integrated in a compact fitting: - Solenoid valves with a design pressure of up to 0 mbar as per DIN EN Class A Group - Precision outlet pressure adjustment - Servo pressure control unit as per DIN EN 88 Class A Group - Outlet pressure: - 00 mbar - External pulse lines for optimal outlet pressure stability or pulse flange - Flange connections with pipe threads to ISO 7/ or NPT - Easy assembly - Low weight The modular system permits individual solutions incorporating the valve proving system, mini/maxi pressure switches, pressure limiter. Higher flow rates are achieved at a low pressure differential despite the double solenoid valve s compact design. Application The servo pressure controller facilitates optimal mixture formation in forced air burners and pre-mix burners in combination with mechanical or electronic combined gas-air controllers; this applies to both the modulating and multistage modes. Suitable for gases of gas families,, and other neutral gaseous media. Approvals EC type test approval as per EC Gas Appliance Directive: DMV-SE CE-008 AS 00 EC type test approval as per EC Pressure Equipment Directive: DMV-SE CE00 Approvals in other important gas consuming countries.

2 Functional description Gas flow. If valves V and V are closed, chamber (a) is subjected to inlet pressure up to the double seat of valve V.. The min. pressure switch is linked to chamber (a) by a hole (option). If the inlet pressure exceeds the nominal value set at the pressure switch, the pressure switch switches through to the automatic gas burner control.. Valves V and V open after they have received a release signal of the automatic gas burner control. Gas flow is released through chambers a, b and c. Mode of operation of the valve controller combination at valve V An inlet pressure-equalised controller is integrated in valve V (pressure control unit). Valve stem V is linked to the valve plate assembly. When the valve stem opens, it prestresses the compression spring and releases the control unit. When the valve stem closes, the closing forces act directly on the valve plate of the control unit. Valves V and V are actuated together electrically. In closed position, valve V shuts off the pressure chamber below working diaphragm M from the inlet pressure p inside chamber (a). The valve stem of valve V controls valve V. The pressure below working diaphragm M is determined by a variable flow crosssection D. The outlet pressure counteracts the force of setting spring E via servo diaphragm S until a force equilibrium occurs. The opposite side of the servo diaphragm is exposed to ambient pressure p amb.. Changes in the force equilibrium lead to a change in the flow cross-section D downstream of valve V. The pressure below the working diaphragm changes. Control unit V adjusts the valve cross-section to suit the new volumetric flow. Schematic diagram of DMV-SE V Main valve V Main valve V Control valve V Control valve M D S E Optional: Threaded flange with filter and pressure switch. Please order separately. Pressure taps, schematic diagram of gas valve DMV-SE 7 - DMV-SE p V Working diaphragm Restrictor Servo diaphragm Setting spring for outlet pressure a V a, b, c Pressure chambers in direction of flow p Inlet pressure p Burner pressure, outlet pressure Ambient pressure p amb M S b V E V pbr pamb,,, Screw plug G /8, Test nipple (optional) 7 Pulse line p a min. x DN V M 7, extern PN, DN V c V b D V V V c p Mode of operation of valve V The valve stem of valve V is connected to the valve plate assembly. When the valve stem opens, it prestresses the compression spring. Valve V opens fully and without delay. Valve V is actuated by valve V. In the closed position, valve V shuts off the pressure chamber below working diaphragm M from burner pressure. Closing function When the power supply to the solenoid coils of main valves V and V is interrupted, the compression springs close these valves within. min. x DN 7, extern PN, DN 8

3 Specifications Nominal widths Flanges with tube threads to ISO 7/ (DIN 999) DMV-SE 7 DMV-SE - DMV-SE Rp /, /, Rp, /, /, Rp and their combinations and their combinations Max. operating pressure Inlet pressure ranges Outlet pressure ranges 0 mbar S 0,,, 8: S 00, 0: S 0, S : S, S 8: S 00, S 0: p e = - 0 mbar p e = - 0 mbar : - 0 mbar : - mbar : 0-00 mbar Media Ambient temperature Gases of gas families, and and other neutral gaseous media - C to +70 C for S..0, simultaneous opening - C to +0 C for S.., separate opening Dirt trap device Pressure switch Servo pressure control section Solenoid valves V, V Test gas connection Pulse line Voltage/frequency Sieve A suitable gas filter should be connected upstream. For further information, refer to Datasheets.0 Gas and Air Filters and 7.0 Flange-on Filters Types GW A, ÜB A / NB A to DIN EN 8 may be attached. For further information, refer to Datasheets.0 and.07 Pressure Switches for DUNGS Multiple Actuators Inlet pressure-equalised pressure controller, valve V shuts off tightly when switched off, as per DIN EN 88 Class A. Servo controller with adjustable burner pressure) Versions for equalised pressure and zero pressure possible Valve as per DIN EN Class A Group, fast closing, fast opening G /8 DIN ISO 8, on the inlet and outlet flanges, downstream of sieve at both ends, between V and V at both ends, downstream of V (adding on a pressure switch may exclude a test gas connection) Connection G /8 to DIN ISO 8 for burner pressure ( : gas) The pulse line must be made of steel and > PN, DN. Condensate from the pulse line must not enter the fittings. It is essential to comply with the instructions given in your Operating and Instruction Manuals. Alternatively: Pulse flange (see page 8) 0 VAC + % +0 %; - 0 Hz Preferred voltages: 0-0 VAC, - 8 VDC Electrical connections Output/power consumption ON period Degree of protection Radio interference suppression Plug-and-socket connection as per DIN EN 7- at 0 VAC; +0 C: please refer to Type survey 00 % ED IP as per IEC 9 (EN 09) Degree of interference N Materials of gas wetted parts Housing Diaphragms, seals Solenoid drive Aluminium die casting NBR basis, Silopren (silicone rubber) Steel, brass, aluminium Installation position Horizontal with solenoid in upright position 8

4 Dimensions DMV-SE 7-/ c g d e g d e f DMV-SE / b a c f b a 8

5 Type Order.No. 0 VAC DN Rp Openningtime P max. [VA] Dimensions [mm] a b c d e f g Solenoid Nr. Switching Weight operations/h [kg] S 0 9 / - / , S 8 / - / , S 7 80 / - / , S 8 / - / , S 00 8 / - / , S 0 / - / , DMV-SE / S DMV-SE / S DMV-SE / S DMV-SE / S 8 DMV-SE / S 00 DMV-SE / S 0 DMV-SE / S 0 DMV-SE / S DMV-SE / S DMV-SE / S 8 DMV-SE / S 00 DMV-SE / S 0 DMV-SE / S 0 DMV-SE / S DMV-SE / S DMV-SE / S / - / / - / - / - / ,9,9,9,9,9.9,,,, DMV-SE / S , DMV-SE / S , 8

6 Characteristics of volumetric flow vs. pressure gradient in the fully stabilised state with sieve; a suitable gas filter should be used Recommended working range p [mbar] DMV-SE / p [mbar] Basis d on + C, 0 mbar, trocken + C, 0 mbar, dry + C, 0 mbar, sec + C, 0 mbar, secco Vn [m /h] Luft / Air / Aria dv =, Vn [m /h] Erdgas/Natural gas/gaz Naturel/Gas metano dv = 0, DMV-SE / Recommended working range Basis d on + C, 0 mbar, trocken + C, 0 mbar, dry + C, 0 mbar, sec + C, 0 mbar, secco Vn [m /h] Luft / Air / Aria dv =, Vn [m /h] Erdgas/Natural gas/gaz Naturel/Gas metano dv = 0, f = V gas used = density of air density of gas used V air x f Gas type Natural gas Town gas Liquid gas Air Density [kg/m ] 0,8 0,8,08, f,, 0,77,00 8

7 Characteristics of volumetric flow vs. pressure gradient in the fully stabilised state with sieve; a suitable gas filter should be used DMV-SE / DMV-SE / Recommended working range DMV-SE / p [mbar] Basis d on + C, 0 mbar, trocken + C, 0 mbar, dry + C, 0 mbar, sec + C, 0 mbar, secco Vn [m /h] Luft / Air / Aria dv =, Vn [m /h] Erdgas/Natural gas/gaz Naturel/Gas metano dv = 0, DMV-SE / Recommended working range p [mbar] Basis d on + C, 0 mbar, trocken + C, 0 mbar, dry + C, 0 mbar, sec + C, 0 mbar, secco Vn [m /h] Luft / Air / Aria dv =, Vn [m /h] Erdgas/Natural gas/gaz Naturel/Gas metano dv = 0, 7 8

8 Double solenoid valve Control and safety combination valve Servo pressure controller - / Information on system accessories Further information Pressure switches ÜB A, NB A GW A Gas filter GF/ Rp / - Flange-on filters Valve proving system VPS S... Motorised butterfly valve DMK Rp / - Linear actuator DML Rp - Flange for DMV-SE // DMV-SE // DMV-SE // DMV-SE // Rp/NPT Rp / Rp / Rp Rp / Rp Rp / Rp / Rp NPT / NPT / NPT NPT / Datasheet.07 Datasheet.0 Datasheet.0 Datasheet 7.0 Datasheet 8.0 Datasheet.0 Datasheet. Order No The DMV-SE is prepared for direct attachment of DUNGS system accessories and additional devices. Pulse flange for ø DMV-SE / ø DMV-SE / ø DMV-SE / ø Adapter, set pressure gauge flange G/ Adapter GW A with G/ Adapter Adapter GW A o flange Always order flanges, plug and socket connections and system accessories separately. Order No DMV-SE // DMV-SE // DMV-SE // DMV-SE // DMV-SE / Electrical plug NPT NPT / NPT / NPT Rp pol + PE We reserve the right to make any changes in the interest of technical progress. Head Offices and Factory Karl Dungs GmbH & Co. KG Siemensstraße -0 D-70 Urbach, Germany Telephone +9 (0)78--0 Fax +9 (0)78-- Postal address Karl Dungs GmbH & Co. KG Postfach 9 D-70 Schorndorf, Germany info@dungs.com Internet 8 8