GasMultiBloc Combined regulator and safety shut-off valves Two-stage function Integrated bypass valve MB-ZRD(LE) B07

Transcription

1 GasMultiBloc Combined regulator and safety shut-off valves Two-stage function Integrated bypass valve MB-ZRD(LE) - B07 7. Printed in Germany Rösler Druck Edition 0.0 r. 9 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, two main valves and one bypass valve: B07 - Two single-stage valves, one two-stage valve - Two valves are fast opening, one valve is slow opening - Solenoid valves up to 0 mbar as per DI E 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, bypass restrictor at valve V - 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 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 EC type test approval as per EC Gas Appliance Directive: MB-ZR...- B07 CE-008 AP EC type test approval as per EC Pressure Equipment Directive: MB-ZR...- B07 CE00 Approvals in other important gas consuming countries.

2 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 flow through chambers A, B and via bypass valve V in C of the GasMultiBloc is released. 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. On request, the second stage of valve V opens. Operating method of valve-regulator combination on valve V A regulator, compensating for residual pressure is integrated in valve V (pressure regulating part). Armature V is not connected to the valve plate unit. When it opens, the armature pretensions the compression spring and releases the valve plate unit. When the valve closes, the armature acts directly on the valve plate unit. The output pressure upstream of valves V and V is defined by pretensioning the regulating spring 7 (tension spring) via setting screw 8. The output pressure acts via opening E on the working diaphragm 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. Sectional drawing of MB-ZRD(LE)...B Pressure regulator Microfilter Valve V Connection flange Closing spring V Housing 7 Regulating spring 8 Armature V 9 Solenoid V 0 Gas pressure switch (optional) D V/ V/ B p p A C E V Electrical connection Valve V Closing spring V Armature V (st stage) Solenoid V (st stage) Armature V (nd stage) 7 Armature V (nd stage) Setting: 8 - Gas pressure pa 9 - Partial volume, st stage 0 - Main volume - Fast stroke 7 V 7 8 Working diaphragm Compensation diaphragm Solenoid V Armature V Closing spring V 7 Valve V 8 Bypass restrictor 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 8. Pressure taps 0 p e p a p Br Operating method of valve V The armature of valve V is connected to the valve plate unit. When it opens, the armature pretensions the compression spring. The maximum valve opening can be set by limiting the armature stroke by means of the main volume restrictor 0. Min. opening (residual stroke) of Valve (0. to.0 mm) The main volume restrictor 0 is set by rotating the adjusting plate or the hydraulic brake. When the second stage of valve opens, compression spring is continuously pretensioned. The maximum valve opening of the second stage can be set by limiting the armature stroke by means of the main volume restrictor. The main volume restrictor is set by rotating the adjusting plate or the hydraulic brake. The fast and/or slowl opening characteristic is influenced by setting the fast stroke at the hydraulic brake under the cover. 0 Filter cover,,, G /8 screw plug Test nipple M screwed sealing plug Electrical connection V V V 0 p a p Br P L Mp 0 P L Closing function When the supply voltage to the main valve solenoid coils is interrupted, the valves V, V and V are closed within < s by the compression springs. P L MP P L Valves V, V st stage Mp L P Valve V nd stage MB-ZRD(LE) B07 S /S Mp L P

3 Specifications ominal diameters Flange with pipe threads as per ISO 7/ (DI 999) Max. operating pressure Output pressure ranges Pressure stage MB- /7 B07 Rp /, / and their combinations 0 mbar ( kpa) MB- S p a : mbar to 0 mbar MB- S p a : mbar to mbar P 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, B A, ÜB A mountable as per DI E 8. For further information, refer to Datasheet GW A o. 8 and Datasheet GW A o. 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, fast closing, fast opening Valve as per DI E Class A Group, fast closing Valve V design Main volume restrictor Partial volume restrictor MB-ZR fast opening with without MB-ZRD fast opening with with MB-ZRDLE slow opening with with MB-ZRLE slow opening with without Valve as per DI E Class A Group, with volume restrictor For G /8 as per DI ISO 8, refer to Pressure taps on page Connection downstream of valve V, pressure switch mountable on adapter laterally -0 Hz 0-0 V AC, - % +0 % Other preferred voltages: VAC, 0-0 VAC, 8 VDC, -8 VDC Plug connection as per DI E 7- for valves and pressure switches Refer to Dimensions on page 00 % IP as per IEC 9 (E 09) 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. Closed position signal contact Closed position signal contact, type K0/ (DI-tested), mountable to V

4 Equipment variants GasMultiBloc...B07 Two-stage function MB-ZR MB-ZRD MB-ZRDLE MB-ZRLE 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 = 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 0 mbar = - mbar up to 0 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 = D 0, V = Single-seat valve = D, V = Single-seat valve 7 = D 0, V = Double-seat valve 0 = D, V = Single-seat valve = D, V = Double-seat valve = D, V = Double-seat valve 0 = D, 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

5 Dimensions [mm] k f h g i j e d = Space requirement for cover of pressure switch d j = Space requirement for exchanging the solenoid k = Space requirement for K0/ closed position signal contact a b c Type MB-ZRD /7 B07 MB-ZRD(LE) /7 B07 MB-ZRD 0/ B07 MB-ZRD(LE) 0/ B07 ominal rating [VA] 0 V AC; +0 C S S a 0 0 b c d e 0 0 Dimensions [mm] f g h i j k Weight [kg].... Volumetric flow pressure loss characteristic via bypass valve V, restrictor open p [mbar] MB-ZRD(LE) / 7 Bypass V MB-ZRD(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, 0, Vn [m /h] Luft / Air / Aria dv =,00 0, 0, 0, 0, 0, 0, Vn [m /h] Erdgas/atural gas/gaz aturel/gas metano dv = 0,

6 GasMultiBloc Combined regulator and safety shut-off valves Two-stage function Integrated bypass valve MB-ZRD(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 0 00 p = mbar Br Recommended operating range 0 p [mbar] V min. MB-ZRD(LE) / 7 V min. MB-ZRD(LE) 0 / MB-ZRD(LE) Rp / - Rp MB-ZRD(LE) 7 Rp / - Rp MB-ZRD(LE) 0 Rp - Rp MB-ZRD(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, 0, Vn [m /h] Luft / Air / Aria dv =,00 0, 0, 0, 0, 0, 0, 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 Density [kg/m ] dv f 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 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