GasMultiBloc Combined regulator and safety shut-off valves Single-stage function MB-D(LE) 0 B0 7.0 Printed in Germany Edition 0.8 r. 765 6 Technical description The DUGS GasMultiBloc integrates filter, regulator, valves and pressure switches in one compact fitting. - Dirt trap: microfilter - One regulator and two main valves: B0 - Two valves are fast opening - One valve is fast opening, one valve is slow opening - Solenoid valves up to 00 mbar (0 kpa) as per DI E 6 Class A Group - Sensitive setting of output pressure by proportional regulator as per DI E 88 Class A Group - High flow rates with low pressure drop - DC solenoid drive interference degree - Main volume 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 external ignition gas tap in connection with separately controlled valves, by adding a valve proving system, mini/maxi pressure switches, pressure limiters, partial volume setting by closing stroke limiter at valve V and regulator blocking for liquid gas applications. Application The modular system permits individual solutions in gas safety and regulator engineering. Suitable for gases of families,, and other neutral gaseous media. Approvals EC type testing certificate as per: EC-Gas Appliances Regulation 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 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 7 pretensions compression spring (V) 5 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 regulating spring 8 (tension spring) via setting screw 6. The output pressure acts via opening E on the working diaphragm of regulator part. In regulated state, setting spring inlet pressure and pressure of working diaphragm are in force equilibrium. Sectional drawing of MB-DLE... 0 9 8 7 6 5 Pressure regulator Microfilter Valve V Connection flange 5 Closing spring V 6 Housing 7 Armature V V V p p A 6 7 B E 8 9 8 Regulating spring 9 Solenoid V 0 Electrical connection Valve V Closing spring V Armature V Solenoid V C 5 5 Solenoid housing Setting: 6 - Gas pressure p a 7 - Main volume 8 - Fast stroke 9 Hydraulic brake Operating method of valve V Armature of valve V is connected to valve plate unit. When it opens, armature pretensions closing spring. The maximum valve opening can be set by limiting the armature stroke by means of the main volume restrictor 7. Min. opening (residual stroke) of valve (0.5 to.0 mm) Main volume restrictor 7 is set by rotating the adjusting plate or the hydraulic brake 9. The fast and/or slow opening characteristic is influenced by setting the fast stroke 8 at the hydraulic brake 9 under the cover. Closing function When the supply voltage to the solenoid coils of valves V and V is interrupted, they are closed within < s by the compression springs. Pressure taps,, G /8 screw plug Test nipple, optional Electrical connection S 0/S 50 p e p e MP pa pa P L P L Closing stroke limitation (option) A partial volume setting is possible by means of a closing stroke limiter. Valve V becomes a regulating actuator without zero shutoff. Partial volume and main volume are adjustable. S /S 5 P L P L MP P L P L P L P L P L 6
Specifications ominal diameters Flange with pipe threads as per ISO 7/ (DI 999) Max. operating pressure MB- 0 B0 Rp /8, / and their combinations MB- 0 p max. = 00 mbar (0 kpa) Output pressure ranges MB- 0 B0 S0/S MB- 0 B0 S50/S5 p a : mbar (0. kpa) to 0 mbar ( kpa) p a : mbar (0. kpa) to 50 mbar (5 kpa) Media Ambient temperature Dirt trap Pressure switches Pressure regulator Solenoid valve V Solenoid valve V Gases of families,, and other neutral gaseous media -5 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 by removing the valve. Types GW A5, GW A, B A, ÜB A mountable as per DI E 85. For further information, refer to Datasheet GW A o. 5 8 and Datasheet GW A5 o. 5 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 6 Class A Group, fast closing, fast opening Valve as per DI E 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 Measuring/ignition gas connection Voltage / frequency For G /8 as per DI ISO 8, refer to Pressure taps on page 50-60 Hz, 0-0 V AC, -5% +0% Electrical connection Rating/power consumption Switch-on duration Degree of protection Radio interference Plug connection as per DI E 750-80 for valves and pressure switches Refer to Dimensions on page 5 00% IP 5 as per IEC 59 (E 6059) 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 Solenoid vertically upright or lying horizontally as well as its intermediate positions. 6
Equipment variants GasMultiBloc...B0 Single-stage function MB MB-D MB-DLE MB-LE Microfilter (standard) with sieve Gas pressure switch downstream of filter Pressure regulator Valve V, double seat Valve V, single seat Closing stroke limitation Valves opening together Valves opening separately Flange Rp /8 Rp / 0 B0 () () V becomes an actuator without shutoff S 0 S = possible () = on request - = not possible MB-...B0 version V = Valve V = Valve = Filter = Pressure switch 5 = Regulator V 5 V Mounting of VPS 50 valve proving system possible Type key of MultiBloc MB- XX XXX XX BOX SXX 0 = common = separated = - 0 mbar up to 00 mbar 5 = - 50 mbar up to 00 mbar = two A valves for main gas + regulator 7 = two A valves for main gas, one A valve together with V as internal bypass around V + regulator 0 = D 0, V = Single-seat valve 05 = D 5, V = Single-seat valve 07 = D 0, V = Double-seat valve 0 = D 5, V = Single-seat valve = D, V = Double-seat valve 5 = D 0, V = Double-seat valve 0 = D 50, V = Double-seat valve 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 6
Dimensions [mm] A 0 6 7 B 70 8,5,5 57,5 A = Space requirement for opening the cover of pressure switch B = Space requirement for exchanging the solenoid Type Rp Opening time Weight [kg] MB-D 0 B0 MB-DLE 0 B0 Rp / Rp / < s < 0 s..5 Rating / power consumption [VA] 0 V AC; +0 C MB 0 B0 S 0 MB 0 B0 S 6 5 6
GasMultiBloc Combined regulator and safety shut-off valves Single-stage function MB-D(LE) 0 B0 Volumetric flow pressure loss characteristics in regulated state with microfilter 00 80 p Br = mbar 60 50 0 0 Recommended operating range p [mbar] 0 0 8 6 5 V min. MB-D(LE) 0 MB-D(LE) 0 Rp /8 - Rp /8 MB-D(LE) 0 Rp / - Rp / Basis + 5 C, 0 mbar, trocken Based on + 5 C, 0 mbar, dry Base + 5 C, 0 mbar, sec Base + 5 C, 0 mbar, secco 0, 0, 0, 0, 0,5 0,6 0,8 5 6 7 8 90 0 0 0 60 80 00 00 Vn [m /h] Luft / Air / Aria dv =,00 0, 0, 0, 0,50,6 0,8 5 6 7 8 90 0 0 0 60 80 00 00 Vn [m /h] Erdgas/atural gas/gaz aturel/gas metano dv = 0,65 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 Density [kg/m ] 0.8 0.58.08. dv 0.65 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. KG Karl-Dungs-Platz D-7660 Urbach, Germany Telephone +9 (0)78-80-0 Fax +9 (0)78-80-66 Postal address Karl Dungs GmbH & Co. KG Postfach 9 D-760 Schorndorf, Germany e-mail info@dungs.com Internet www.dungs.com 6 6