GasMultiBloc Combined regulator and safety shut-off valves Single-stage function MB-D(LE) 0-2 B0 7.0 Printed in Germany Rösler Druck Edition 08.00 r. 2 72 Technical description The DUGS GasMultiBloc integrates filter, regulator, valves and pressure switches in one compact fitting. Various designs are possible by the modular system: - Dirt trap: microfilter - One regulator and two valves: B0 - Two valves are fast opening - One valve is fast opening and one valve is slow opening - Solenoid valves up to 0 mbar as per DI E Class A Group 2 - Sensitive setting of output pressure by proportional regulator as per DI E 88 Class A Group 2 - High flow rates with low pressure drop - DC solenoid drive interference degree - Main volume restrictor at valve V2 - Hydraulic opening delay - Flange connections with pipe threads as per ISO 7/ - Simple mounting, compact, light-weight The modular system permits individual solutions by using external ignition gas tap in connection with separately controlled valves, by adding a valve proving system, mini/maxi pressure switches, pressure limiters, limit switch V2. Application The modular system permits individual solutions in gas safety and regulator engineering. Suitable for gases of families, 2, and other neutral gaseous media. Approvals EU type test approval as per EU Gas Appliance Directive. MB...0... B0 CE-008 AP 02 MB...07... B0 CE-008 AR 0 MB...0... B0 CE-008 AR 0 MB...2... B0 CE-008 AR 0 Approvals in other important gas-consuming countries.
Functional description of gas flow When the valves V and V2 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 V2 open. The gas flow through chambers A, B and C of the GasMultiBloc. 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 valve plate unit. When it opens, armature 8 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 V2 is defined by pretensioning regulator spring 8 (tension spring) via setting screw 7. The output pressure acts via opening E on the working diaphragm 2 of the regulator part. 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. Sectional drawing of MB-DLE... Pressure regulator 2 Microfilter Valve V Connection flange Closing spring V Housing 7 Armature V 8 Regulating spring Pressure taps 0 2 p e 0 9 8 7 2 D 9 20 7 8 V p p 2 A B C E V2 9 Solenoid V 0 Gas pressure switch Electrical connection 2 Valve V2 Closing spring V2 Armature V2 Solenoid V2 Solenoid housing p a pbr 2 2 22 Setting: 7 - Gas pressure p a 8 - Main volume 9 - Fast stroke 20 Hydraulic brake 2 Working diaphragm 22 Compensation diaphragm Operating method of valve V2 Armature of valve V2 is connected to valve plate unit 2. When it opens, armature pretensions compression spring. The max. 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) Main volume restrictor 8 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 solenoid coils of valves V and V2 is interrupted, they are closed within < s by the compression springs. 0 Filter couver,,, G /8 screw plug 2 Test nipple M screwed sealing plug Electrical connection IEC 70- (VDE 0 T) S 20/S S 22/S 2 0 pe pa P L 2 p Br P L P L 2 0 P2 L2 P L 2 P2 L2 2
Specifications ominal diameters Flange with pipe threads as per ISO 7/ (DI 2999) Max. operating pressure MB- 0/07 B0 Rp /2, / and their combinations 0 mbar ( kpa) MB- 0/2 B0 Rp /,, / and their combinations Output pressure ranges Pressure stage Media Ambient temperature MB- S20/S22 p a : mbar to 20 mbar MB- S/S2 p a : mbar to mbar P Gases of families, 2, 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.) Dirt trap Pressure switches Pressure regulator Solenoid valve V Solenoid valve V2 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 A2, B A2, ÜB A2 mountable as per DI E 8. For further information, refer to Datasheet GW A2 o. 2 8 and Datasheet GW A o. 22 90. Pressure regulator compensated for residual pressure, leakproof seal when switched off by means of valve V as per DI E 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 DI E Class A Group 2, fast closing, fast opening Valve as per DI E Class A Group 2 Valve V2 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 Measuring/ignition gas connection Burner pressure monitor p Br Voltage / frequency Electrical connection Rating/power consumption Switch-on duration Degree of protection Radio interference For G /8 as per DI ISO 228, refer to Pressure taps on page 2 Connection downstream of valve V2, pressure switch A2 mountable on adapter laterally -0 Hz 220-20 V AC - % + 0% Other preferred voltages: 20 VAC, 0-20 VAC, 8 VDC, 2-28 VDC Plug connection as per DI, IEC, IEC 70 (VDE 0700, VDE 0722) for valves and pressure switches Refer to Dimensions on page 00% IP as per IEC 29 (E 029) Interference degree Materials of gas-conveying parts Housing Diaphragms, seals Solenoid drive aluminium die casting BR basis, Silopren (silicone rubber) steel, brass, aluminium Installation position Closed position signal contact Solenoid vertically upright or lying horizontally as well as its intermediate positions Closed position signal contact, type K0/ (DI-tested), mountable on V2
Equipment variants GasMultiBloc...B0 Single-stage function MB MB-D MB-DLE MB-LE Microfilter with sieve Gas pressure switch downstream of filter downstream of valve V2 on adapter laterally downstream of valve V2 on flange with adapter Pressure regulator Valve V, double seat Valve V2, single seat Valve V2, double seat Valves controlled together Valves controlled separately Flange Rp /2 Rp / Rp Rp / 0 B0 07 B0 0 B0 2 B0 S 20, S S 22, S 2 = possible () = on request - = not possible MB-...B0 version V = Valve V2 = Valve 2 = Dirt trap = Pressure switch = Regulator V V2 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 V2 0 = common 2 = separated Outlet pressure Inlet pressure 2 = - 20 mbar up to 0 mbar = - mbar up to 0 mbar S = Series (type-independent) Gas train schematic diagram = two A valves for main gas + regulator 2 = two A valves for main gas 7 = two A valves for main gas, one A valve together with V as internal bypass around V2 + regulator Design type (generation) B Construction size, nominal diameter 0 = D 0, V2 = Single-seat valve 0 = D, V2 = Single-seat valve 07 = D 20, V2 = Double-seat valve 0 = D 2, V2 = Single-seat valve 2 = D 2, V2 = Double-seat valve = D 0, V2 = Double-seat valve 20 = D, V2 = 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
Dimensions [mm] f h g i k l e d a b c d = Space requirement for cover of pressure switch k = Space requirement for exchanging the solenoid l = Space requirement for K0/ closed position signal contact Type Rp Opening time a b c d Dimensions [mm] e f g h i j k l Weight [kg] MB-D 0/07 B0 MB-DLE 0/07 B0 MB-D 0/2 B0 MB-DLE 0/2 B0 Rp /2 Rp / Rp Rp / < s < 20 s < s < 20 s 0 0 0 0 8 8 8 8 0 0 0 0 20 20 00 0 2 0 2 2 8 8 2 2 2.2/2.2 2./2../../.7 Rating / power consumption [VA] ~(AC) 20 V AC; +20 C: MB 0/07 S 20 MB 0/07 S MB 0/07 S 22 MB 0/07 S 2 MB 0/2 S 20 MB 0/2 S MB 0/2 S 22 MB 0/2 S 2 28 9 9
GasMultiBloc Combined regulator and safety shut-off valves Single-stage function MB-D(LE) 0-2 B0 Volumetric flow pressure loss characteristics in regulated state with microfilter MB-0 S20, S22 MB-0 S, S2 MB-07 S20, S22 MB-0 S20, S22 MB-07 S, S2 MB-0 S, S2 MB-2 S20, S22 MB-2 S, S2 0 00 p = mbar Br 200 00 0 0 Recommended operating range 0 p [mbar] 20 0 8 V min. MB-D(LE) 0 / 07 V min. MB-D(LE) 0 / 2 MB-D(LE) 0 Rp /2 - Rp /2 MB-D(LE) 07 Rp / - Rp / MB-D(LE) 0 Rp - Rp MB-D(LE) 2 Rp / - Rp / 2 Basis + C, 0 mbar, trocken Based on + C, 0 mbar, dry Base + C, 0 mbar, sec Base + C, 0 mbar, secco 0, 0,2 0, 0, 0, 0, 0,8 2 7 8 90 20 0 0 0 00 200 Vn [m /h] Luft / Air / Aria dv =,00 0,2 0, 0, 0, 0, 0,8 2 7 8 90 20 0 0 0 00 200 Vn [m /h] Erdgas/atural gas/gaz aturel/gas metano dv = 0, 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 at. gas City gas LPG Air Spec. Wgt. [kg/m ] 0.8 0.8 2.08.2 dv 0. 0.7.7.00 f.2. 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 -0 D-70 Urbach, Germany Telephone +9 (0)78--0 Fax +9 (0)78-- Postal address Karl Dungs GmbH & Co. Postfach 2 29 D-702 Schorndorf, Germany e-mail info@dungs.com Internet www.dungs.com