Pressure regulator with solenoid valve VAD Air/gas ratio control with solenoid valve VAG Variable air/gas ratio control with solenoid valve VAV

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1 Pressure regulator with solenoid valve Air/gas ratio control with solenoid valve Variable air/gas ratio control with solenoid valve VAV Product brochure GB Edition All-purpose servo regulator for gaseous media with integrated safety valve Suitable for a max. inlet pressure of 500 mbar (7 psig) inimum installation effort: no external impulse line required Check indication by blue LED Setting options from two sides EC type-tested and certified, : F and CSA approved AGA approved

2 2,, VAV Edition VAV Application Pressure regulator, air/gas ratio control and variable air/gas ratio control VAV incorporating servo technology for shut-off and precise control of the gas supply to gas burners and gas appliances. For use in gas control and safety systems in all sectors of the iron, steel, glass and ceramics industries, also in domestic or commercial heat generation, such as the packaging, paper and foodstuffs industries. Constant pressure governor, Class A, with high control accuracy, for excess air burners, atmospheric burners or single-stage force draught burners. Pressure preset via setpoint spring. Air/gas ratio control, Class A, for maintaining a constant air/gas pressure ratio for modulating-controlled burners or with 1 bypass valve for stage-controlled burners. Pressure preset by the air control line. The..N can also be used as a zero governor for gas engines. VAV Variable air/gas ratio control, Class A, for maintaining a constant gas/air pressure ratio for modulating-controlled burners. Pressure preset by the air control line. The ratio of gas pressure to air pressure remains constant. It can be set from 0.6:1 to 3:1. Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure p F. : controls gas outlet pressure p G via setpoint spring. : constant gas/air pressure ratio via air control pressure. VAV: adjustable gas/ air pressure ratio. Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure p F. Regulator on excess air burners in the ceramics industry Air/gas ratio control on melting furnace for ensuring stoichiometric combustion over the entire capacity range Aluminium age-hardening furnace with air/gas ratio controls for air deficiency cut-out

3 ,, VAV Edition Application examples Constant pressure control The pressure regulator with gas solenoid valve maintains the set gas outlet pressure p G constant when subject to differing flow rates. If a second gas solenoid valve is used upstream of the, this complies with the requirements of EN for two Class A gas solenoid valves connected in series. Constant pressure control with two gas solenoid valves The pressure regulator with gas solenoid valve maintains the set gas outlet pressure p G constant when subject to differing flow rates. max. Constant pressure control with max. pressure switch In this example, the minimum inlet pressure p e and the maximum outlet pressure p G are monitored with the pressure switches. The simple attachment of the pressure switch module makes installation easier. max. Constant pressure control with noncontrolled pilot gas outlet In this application, the pilot burner is supplied with a high inlet pressure via the pilot gas outlet. The simple attachment of the bypass valve module makes installation easier. The minimum inlet pressure p e and the maximum outlet pressure p G are monitored with the pressure switches. 1

4 4,, VAV Edition odulating control The gas outlet pressure p G is con trolled via the air/gas ratio control with gas solenoid valve. The gas outlet pressure p G follows the changing air control pressure. The ratio of gas pressure to air pressure remains constant. The is suitable for a control range up to 10:1. IC odulating control with two gas solenoid valves The gas outlet pressure p G is con trolled via the air/gas ratio control with gas solenoid valve. The gas outlet pressure p G follows the changing air control pressure. The ratio of gas pressure to air pressure remains constant. The is suitable for a control range up to 10:1. IC odulating control with two gas solenoid valves and inlet pressure switch In this case, the minimum inlet pressure p e is monitored by the pressure switch. The simple attachment of the pressure switch module makes installation easier. IC 1 High/Low control At high fire, the gas outlet pressure p G follows the air control pressure. The ratio of gas pressure to air pressure remains constant. Low fire is determined via the bypass valve. Here as well, the simple attachment of the bypass valve module makes installation easier. IC 40

5 ,, VAV Edition N Venturi Zero pressure control In this application, the control air pressure is the atmospheric air pressure. The air flow rate generates a negative pressure in the gas pipe via the Venturi. This negative pressure is compensated by the air/gas ratio control with gas solenoid valve..n. The greater the negative pressure, the greater the gas flow rate. IC VAV odulating control with variable air/gas ratio control with gas solenoid valve The ratio of air pressure to gas pressure can be adjusted infinitely between 0.6:1 and 3:1. Pressure fluctuations in the combustion chamber can be compensated via the combustion chamber control pressure p F. p F IC p F VAV p F odulating control in domestic heat generation This application shows the variable air/gas ratio control with solenoid valve VAV fitted to a modulating-controlled forced draught burner. The combustion air volume is set via a butterfly valve for air or by adjusting the fan speed.

6 6,, VAV Edition Replacement possibility for ODULINE pressure regulators with gas solenoid valve GVS, GVI, GVIB and GVR are to be replaced by,, + and VAV Type Flange Type GVS Pressure regulator with gas solenoid valve Pressure regulator with gas solenoid valve GVI Air/gas ratio control with gas solenoid valve Air/gas ratio control with gas solenoid valve GVIB Air/gas ratio control with gas solenoid valve Air/gas ratio control with gas solenoid valve and bypass valve and bypass valve + GVR Variable air/gas ratio control with solenoid valve Variable air/gas ratio control with solenoid valve VAV 115 Size 115 3/ " Size 125 on request 115 Size 115 ½" 125 Size 125 Size 1, DN Size 115 ¾" 125 Size 125 Size 1, DN Size 115 1" 125 Size 125 Size 1, DN Size 232 1" 240 Size 240 on request 232 Size 232 1½" 240 Size 240 Size 2, DN ½" Size 350 on request 350 2" Size 350 Size 3, DN L ODULINE + connection flanges Rp internal thread Rp internal thread R TL ODULINE + connection flanges NPT internal thread NPT internal thread N 01 p e max. : 100 mbar (1.5 psig) p e max.: 500 mbar (7 psig) mbar (3 psig) 500 mbar (7 psig) Quick opening Quick opening /N K ains voltage: 24 V DC ains voltage: 24 V DC K Q 120 V AC 120 V AC Q T 220/240 V AC 230 V AC W 3 Electrical connection via terminals Electrical connection via terminals 6 Electrical connection via socket Electrical connection via socket 9 etal terminal connection box Electrical connection via terminals S Position indicator Position indicator with visual indicator** S G Position indicator for 24 V Position indicator for 24 V with visual indicator** G Suitable for biologically produced methane Suitable for biologically produced methane Pressure test point at the inlet Pressure test point at the inlet and outlet* Outlet pressure p G : mbar (1 10 "WC) -25 Outlet pressure p G : 2 90 mbar ( "WC) 5 50 mbar (2 20 "WC) mbar (4 40 "WC) -100 GVS 350L01T3 with Rp 2 connection flanges * Pressure test points may be attached at the left and/or right-hand side. ** Position indicator with visual indicator can be attached at the left- or right-hand side. = standard, = available Standard seat A Example Example 350R/NW-100A with test points

7 ,, VAV Edition Order examplel 240R/NW-100A Selection Pressure regulator with gas solenoid valve EC type-tested and certified,..t (T-product) F and CSA approved Type T /15 /20 /25 /40 /50 R N F 1) /N 1 v v 2 v v v 3 v v v T-product = T Inlet flange nominal size No inlet flange = - Outlet flange nominal size No outlet flange = - Specification may be omitted if outlet = inlet Rp internal thread = R NPT internal thread = N ISO flange = F 1) Quick opening, quick closing = /N Cont Type K Q W SL 2) GL 2) SR 2) GR 2) A 3) B 3) 1 v v v v v v v 2 v v v v v v v 3 v v v v v v v ains voltage: 24 V DC = K 120 V AC; 50/60 Hz = Q 230 V AC; 50/60 Hz = W Position indicator, left: with visual indicator = SL 2 ) for 24 V with visual indicator = GL 2) Position indicator, right: with visual indicator = SR 2) for 24 V with visual indicator = GR 2) Electrical connection: 20 cable gland Plug with socket Plug without socket Connection accessories fitted ax. outlet pressure p G max. for : mbar (1 10 "WC) = mbar (2 20 "WC) = ,0 100 mbar (4 40 "WC) = -100 Standard valve seat = A 3) Reduced valve seat = B 3) 1) For inlet and outlet flanges of the same nominal size: 240 and 350 can be supplied. 2) 1 3: Position in dicator and bypass valve cannot be fitted together on the same side. 3) A = All sizes from outlet nominal size 20, B = Size 1 with outlet nominal size 15. = standard, v = available

8 ,, VAV Edition Order example 240R/NWAE Air/gas ratio control with gas solenoid valve, Variable air/gas ratio control with gas solenoid valve VAV : EC type-tested and certified,..t (T-product) F and CSA approved VAV: EC type-tested and certified Type T /15 /20 /25 /40 /50 R N F 1) /N /VAV 1 v /VAV 2 v v /VAV 3 v v T-product = T Inlet flange nominal size No inlet flange = - Outlet flange nominal size No outlet flange = - Specification may be omitted if outlet = inlet Rp internal thread = R NPT internal thread = N ISO flange = F 1) Quick opening, quick closing = /N Cont. Type K Q W SL 2) GL 2) SR 2) GR 2) A 3) B 3) E K A N /VAV 1 v v v v v v v /VAV 2 v v v v v v v /VAV 3 v v v v v v v ains voltage: 24 V DC = K 120 V AC, 50/60 Hz = Q 230 V AC, 50/60 Hz = W Position indicator, left: with visual indicator = SL 2) for 24 V with visual indicator = GL 2) Position indicator: with visual indicator = SR 2) for 24 V with visual indicator = GR 2) Electrical connection, right: 20 cable gland Plug with socket Plug without socket Connection accessories fitted Standard valve seat = A 3) Reduced valve seat = B 3) Connection kit for for air control pressure / for VAV for air control pressure and combustion chamber control pressure p F : Compression fitting for = E Plastic hose coupling for, VAV = K NPT 1/4 adapter for = A Zero governor for = N 1) For inlet and outlet flanges of the same nominal size: /VAV 240 and /VAV 350 can be supplied. 2) /VAV 1 3: Position indicator and bypass valve cannot be fitted together on the same side. 3) A = All sizes from outlet nominal size 20, B = Size 1 with outlet nominal size 15. = standard, v = available

9 9,, VAV Edition Accessories,, VAV 1 3 Screw plugs Pressure test points Pressure switch Tightness - control TC Bypass/pilot gas valve VBY 8 for size1 Bypass/pilot gas valve 1 Technical data Types of gas: Natural gas, town gas, LPG (gaseous), biologically produced methane (max. 0.1 %-by-vol. H 2 S); other gases on request. The gas must be dry in all temperature conditions and must not contain condense. Inlet pressure range p e : mbar (4 200 "WC), F approved, non operational pressure: 700 mbar (10 psig). CSA approved up to 350 mbar (5 psig). Opening time of the solenoid valve: Quick opening: 0.5 s. Closing time: Quick closing: < 1 s. Ambient temperature: -20 to +60 C (-4 to 140 F), no condensation permitted. Storage temperature: -20 to +40 C (-4 to 104 F), no condensation permitted. Safety valve: Class A to EN 161, Factory utual Research Class: 7410 and 7411, ANSI Z21.21 and CSA 6.5, ANSI Z21.18 and CSA 6.3. Control class A to EN 88. Control range: up to 10:1. ains voltage: 230 V AC, +10/-15%, 50/60 Hz; 120 V AC, +10/-15%, 50/60 Hz; 24 V DC, +20/-20%. Cable gland: 20 x 1.5, Electrical cable with max. 2.5 mm 2 (AWG 12) or plug with socket to EN Enclosure: IP 65. Duty cycle: 100%. Power factor of the solenoid coil: cos φ = 1. Power consumption: Type 24 V DC [W] 120 V AC [W] 230 V AC [W] //VAV //VAV //VAV Valve housing: Aluminium, Valve seal: NBR. Connection flanges with internal thread: Rp to ISO 7-1, NPT to ANSI/ASE. Position indicator contact rating: Type VAx..S VAx..G Voltage V~, 50/60 Hz V~, 50/60 Hz current (resistive load) max. current (resistive load) 100 ma 3 A 2 ma 0,1 A

10 10,, VAV Edition Switching frequency: 5 per minute. Switching Switching cycles current [A] cos ϕ = 1 cos ϕ = 0,6 0, , Outlet pressure p G : mbar (1 10 "WC), mbar (2 20 "WC), mbar (4 40 "WC). Outlet pressure p G : mbar ( WC). Adjusting range at low fire: ±5 mbar (±2 "WC). Transmission ratio of gas to air: 1:1 The inlet pressure must always be higher than the air control pressure + pressure loss p + 5 mbar (2 WC). Connection of the air control pressure :..K: 1 1/8" coupling for plastic hose (internal dia. 3.9 mm, external dia. 6.1 mm) or..e: 1 compression fitting for tube 6x1 or..a: 1 NPT 1/4 adapter or..n: Zero governor with breathing orifice. VAV Outlet pressure p G : mbar ( "WC). Air control pressure : mbar ( "WC). Combustion chamber control pressure p F : -20 to 20 mbar (-7.8 to 7.8 "WC). in. control pressure differential - p F : 0.4 mbar (0.15 "WC). in. pressure differential p G - p F : 0.5 mbar (0.2 WC). Adjusting range at low fire: ±1.5 mbar (±0.6 "WC). Transmission ratio of gas to air: 0.6:1 3:1. The inlet pressure pe must always be higher than the air control pressure x transmission ratio V + pressure loss p mbar (0.6 "WC). Connection of the air control pressure : VAV..K: 2 plastic hose couplings (internal dia. 3.9 mm, external dia. 6.1 mm). Certification EC type-tested and certified pursuant to Gas Appliances Directive (90/396/EEC) in conjunction with EN 161, EN 88 EN 126, EN and EN eets the requirements of the Low Voltage Directive (2006/95/EC) in conjunction with the relevant standards, EC Directive (2004/108/EC) in conjunction with EN F approved, Factory utual Research Class: 7410 and 7411 Safety overpressure slam shut valves. Designed for applications pursuant to NFPA 85 and NFPA 86. CSA approved, Canadian Standards Association - ANSI Z21.21 and CSA 6.5 ANSI Z21.18 and CSA 6.3 UL approval, In preparation. AGA approved Australian Gas Association Detailed information on this product Contact Sales Elster GmbH Postfach Osnabrück Strotheweg Lotte (Büren) Germany T F info@kromschroeder.com Kromschröder, a product brand of the Elster Group We reserve the right to make technical modifications in the interests of progress. Copyright 2007 Elster Group All rights reserved Laudert

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