GasMultiBloc Combined regulator and safety shut-off valves Single-stage function Integrated bypass valve MB-D(LE) - B07 7.08 Printed in Germany Rösler Druck Edition 08.00 Nr. 9 6 Technical description The DUNGS GasMultiBloc integrates filter, regulator, valves and pressure switches in one compact fitting. Various designs are possible by the modular system: - Dirt trap unit: microfilter - One regulator, two main valves and one bypass valve: B07 - Two valves are fast opening, one valve is slow opening - Solenoid valves up to 60 mbar as per DIN EN 6 Class A Group - Sensitive setting of output pressure by proportional regulator as per DIN EN 88 Class A Group - High flow rates with low pressure drop - DC solenoid drive interference degree N - Main volume restrictor at valve V, bypass restrictor at valve V - Hydraulic opening delay - Flange connections with pipe threads as per ISO 7/ - Simple mounting, compact, lightweight The modular system permits individual solutions by using an internal bypass valve in connection with separately controlled valves, by adding a valve proving system, mini/maxi pressure switches, pressure limiters, limit switches at valve V. Application The modular system permits individual solutions in gas safety and regulator engineering. Suitable for gases of families,, and other neutral gaseous media. Approvals EU type test approval as per EU Gas Appliance Directive. MB-...B07 CE-008 AP 0 MB-...7...B07 CE-008 AP 0 MB-...0...B07 CE-008 AP 0 MB-...B07 CE-008 AP 0 Approvals in other important gas-consuming countries.
Functional description of gas flow. When the valves V and V are closed, chamber A is under inlet pressure.. A hole D in the filter housing connects min. pressure switch with chamber A. If the inlet pressure applied to the pressure switch exceeds the incoming reference value, it switches through to the automatic burner control.. After release by the automatic burner control, valves V and V open. The gas flows through chambers A, B and via bypass valve V in C of the GasMultiBloc. The ignition gas volume is adjusted by using the bypass restrictor. The pressure regulator controls the pressure upstream of valves V and V.. When valve V is released, the gas flows directly into chamber C, the bypass valve V remains open. Operating method of valve-regulator combination on valve V A regulator, compensating for residual pressure is integrated in valve V (pressure regulating part). Armature 7 is not connected to the valve plate unit. When it opens, armature 7 pretensions compression spring (V) and releases the valve plate unit. When the valve closes, the armature acts directly on the valve plate unit. The output pressure upstream of valve V is defined by pretensioning the regulating spring 8 (tension spring) via setting screw 7. The output pressure acts via opening E on the working diaphragm 6 of the regulator. In regulated state, setting spring inlet pressure and pressure of working diaphragm are in force equilibrium. The compensating diaphragm ensures the fast closing function of valve V and a high regulating quality. Operating method of bypass valve V The bypass valve V opens at the same time as valve V. Ignition gas flow is set by using bypass restrictor. Sectional drawing of MB-DLE...B07 0 9 8 7 6 6 7 Pressure regulator Microfilter Valve V Connection flange Closing spring V 6 Housing 7 Armature V 8 Regulating spring 9 Solenoid V 0 Gas pressure switch (optional) Pressure taps 0 p e D p a V 6 7 V B p p A C E V Electrical connection Valve V Closing spring V Armature V Solenoid V 6 Solenoid housing Setting: 7 - Gas pressure p a 8 - Main volume 9 - Fast stroke 0 Hydraulic brake p Br 9 0 8 6 V Bypass restrictor Valve V Closing spring V Armature V Solenoid V 6 Working diaphragm 7 Compensation diaphragm Operating method of valve V Armature of valve V is connected to valve plate unit. When it opens, armature pretensions compression spring. The maximum valve opening can be set by limiting the armature stroke by means of the main volume restrictor 8. Min. opening (residual stroke) of valve (0. to.0 mm) The main volume restrictor is set by rotating the adjusting plate or the hydraulic brake. The fast and/or slow opening characteristic is influenced by setting fast stroke 9 at the hydraulic brake under the cover. Closing function When the supply voltage to the main valve solenoid coils is interrupted, valves V, V and V are closed within < s by the compression springs. V 0 p a p Br 6 6 0 0 Filter cover,,, 6 G /8 screw plug Test nipple M screwed sealing plug Electrical connection IEC 70- (VDE 06 T) P L Mp N V P L Mp N P L P L MB-D(LE) B07 S / S 6
Specifications Nominal diameters Flange with pipe threads as per ISO 7/ (DIN 999) Max. operating pressure Output pressure ranges Pressure stage MB- /7 B07 Rp /, / and their combinations 60 mbar (6 kpa) MB- S p a : mbar to 0 mbar MB- S p a : mbar to mbar PN MB- 0/ B07 Rp /,, / and their combinations Media Ambient temperature Dirt trap Pressure switches Pressure regulator Solenoid valve V Solenoid valve V Solenoid valve V (bypass) Measuring/ignition gas connection Burner pressure monitor p Br Voltage / frequency Electrical connection Rating/power consumption Switch-on duration Degree of protection Radio interference Gases of families,, and other neutral gaseous media - C to +70 C (Do not operate MB-D below 0 C in liquid gas systems. Only suitable for gaseous liquid gas, liquid hydrocarbons destroy sealing materials.) Sieve with 0.8 mm mesh width, filter made of random laid nonwoven fabric, microfilter, two-layer, changing the filter is possible without removing the valve. Types GW A, GW A, NB A, ÜB A mountable as per DIN EN 8. For further information, refer to Datasheet GW A No. 8 and Datasheet GW A No. 90. Pressure regulator compensated for residual pressure, leakproof seal when switched off by means of valve V as per DIN EN 88 Class A. Setpoint spring permanently installed (no spring exchange possible). A vent line above roof is not required. Internal pulse tap provided. Valve as per DIN EN 6 Class A Group, fast closing, fast opening Valve as per DIN EN 6 Class A Group Valve V design Main volume restrictor MB fast closing fast opening without MB-D fast closing fast opening with MB-DLE fast closing slow opening with MB-LE fast closing slow opening without Valve as per DIN EN 6 Class A Group, with volume restrictor For G /8 as per DIN ISO 8, refer to Pressure taps on page Connection downstream of valve V, pressure switch mountable on adapter laterally -60 Hz,0-0 V AC, -% +0% Other preferred voltages: VAC, 0-0 VAC, 8 VDC, -8 VDC Plug connection as per DIN 6, IEC, IEC 70 (VDE 0700, VDE 07) for valves and pressure switches Refer to Dimensions on page 00% IP as per IEC 9 (EN 609) Interference degree N Materials of gas conveying parts Housing Diaphragms, seals Solenoid drive aluminium die casting NBR basis, Silopren (silicone rubber) steel, brass, aluminium Installation position Solenoid vertically upright or lying horizontally as well as its intermediate positions. Closed position signal contact Closed position signal contact, type K0/ (DIN-tested), mountable on V 6
Equipment variants GasMultiBloc...B07 Single-stage function MB MB-D MB-DLE MB-LE Microfilter (standard) with sieve Gas pressure switch downstream of filter downstream of valve V on adapter Pressure regulator Valve V, double seat Valve V, single seat Valve V, double seat Valve V, single seat with restrictor Valve opening separately Flange Rp / Rp / Rp Rp / B07 7 B07 0 B07 B07 S... version = possible () = on request - = not possible MB-...B07 version V = Valve V = Valve V = Valve = Filter = Pressure switch, optional 6 = Regulator V V V Mounting of VPS valve proving system possible Mounting of K0/ closed position signal contact possible Type key of MultiBloc MB- XX XXX XX BOX SXX Control of V and V 0 = common = separated Outlet pressure Inlet pressure = - 0 mbar up to 60 mbar = - mbar up to 60 mbar S = Series (type-independent) Gas train schematic diagram = two A valves for main gas + regulator = two A valves for main gas 7 = two A valves for main gas, one A valve together with V as internal bypass around V + regulator Design type (generation) B Construction size, nominal diameter = DN 0, V = Single-seat valve = DN, V = Single-seat valve 7 = DN 0, V = Double-seat valve 0 = DN, V = Single-seat valve = DN, V = Double-seat valve = DN, V = Double-seat valve 0 = DN, V = Double-seat valve Opening behaviour + main volume restrictor without = (MB or MB-ZR) -D = Main volume restrictor -LE = adjustable opening behaviour -DLE = D + LE combination without = single stage ZR = double-stage with partial volume setting first stage MultiBloc 6
Dimensions [mm] k f h g i j e d a b c d j k = Space requirement for cover of pressure switch = Space requirement for exchanging the solenoid = Space requirement for K0/ closed position signal contact Type MB-D /7 B07 MB-DLE /7 B07 MB-D 0/ B07 MB-DLE 0/ B07 Nominal rating [VA] 0 V AC; +0 C S S 6 6 6 6 0 0 0 0 a 0 0 b c 8 8 8 8 d e 0 0 Dimensions [mm] f g h i j 6 6 00 60 8 8 k Weight [kg]..6.8.9 Volumetric flow pressure loss characteristic via bypass valve V, restrictor open 00 60 0 p [mbar] 0 0 8 6 MB-D(LE) / 7 Bypass V MB-D(LE) 0 / Bypass V Basis + C, 0 mbar, trocken Based on + C, 0 mbar, dry Base + C, 0 mbar, sec Base + C, 0 mbar, secco 0, 0, 0, 0, 0, 0,6 0,8 6 7 8 90 Vn [m /h] Luft / Air / Aria dv =,00 6 0, 0, 0, 0, 0,6 0,8 6 7 890 Vn [m /h] Erdgas/Natural gas/gaz Naturel/Gas metano dv = 0,6
GasMultiBloc Combined regulator and safety shut-off valves Single-stage function Integrated bypass valve MB-D(LE) - B07 Volumetric flow pressure loss characteristics in regulated state with microfilter MB- S0, S MB- S, S MB-7 S0, S MB-0 S0, S MB-7 S, S MB-0 S, S MB- S0, S MB- S, S 60 00 p = mbar Br 00 00 Recommended operating range 60 0 p [mbar] 0 0 8 6 V min. MB-D(LE) / 7 V min. MB-D(LE) 0 / MB-D(LE) Rp / - Rp / MB-D(LE) 7 Rp / - Rp / MB-D(LE) 0 Rp - Rp MB-D(LE) Rp / - Rp / Basis + C, 0 mbar, trocken Based on + C, 0 mbar, dry Base + C, 0 mbar, sec Base + C, 0 mbar, secco 0, 0, 0, 0, 0, 0,6 0,8 6 7 8 90 0 0 60 00 00 Vn [m /h] Luft / Air / Aria dv =,00 0, 0, 0, 0, 0,6 0,8 6 7 8 90 0 0 60 00 00 Vn [m /h] Erdgas/Natural gas/gaz Naturel/Gas metano dv = 0,6 f = Dichte Luft Spec. weight air poids spécifique de l'air peso specifico aria Dichte des verwendeten Gases Spec. weight of gas used poids spécifique du gaz utilisé peso specifico del gas utilizzato Gas type Nat. gas City gas LPG Air Density [kg/m ] 0.8 0.8.08. dv 0.6 0.7.67.00 f..6 0.77.00 V verwendetes Gas/gas used/ gaz utilisé/gas utilizzato = V Luft/air/air/aria x f We reserve the right to make any changes in the interest of technical progress. Head Offices and Factory Karl Dungs GmbH & Co. Siemensstraße 6-0 D-7660 Urbach, Germany Telephone +9 (0)78--0 Fax +9 (0)78--66 Postal address Karl Dungs GmbH & Co. Postfach 9 D-760 Schorndorf, Germany e-mail info@dungs.com Internet www.dungs.com 6 6