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Pressure regulators with solenoid valve VAD, VAG, VAV - 8 Pages

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Pressure regulators with solenoid valve VAD, VAG, VAV

Catalog excerpts

Honeywell taper , schroder 'va-lva-rio® s tm pj. sa. ce Pressure regulators with solenoid valve VAD, VAG, VAV, VAH ASA Flow rate regulator VRH Pressure regulators with double solenoid valve VCD, VCG, VCV, VCH • All-purpose servo regulator for gaseous media with integrated safety valve • Suitable for a max. inlet pressure of 500 mbar (7 psig) • Minimum installation effort: no external impulse line required • Setting options from two sides

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Regulators with solenoid valves are designed for shut-off, and thanks to the servo technology, for precise control of the gas supply to gas burners and gas appliances. They are used in gas control and safety systems in all sectors of the iron, steel, glass and ceramics industries, as well as in residential or commercial heat generation, such as the packaging, paper and foodstuffs industries. VAD Constant pressure governor, Class A, with high control accuracy, for excess air burners, atmospheric burners or single-stage forced draught burners. Pressure preset via setpoint spring. In the case...

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Examples of application Constant pressure control The pressure regulator with gas solenoid valve VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates. If a second gas solenoid valve is used upstream of the VAD, this complies with the requirements of EN 746-2 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 VAD maintains the set gas outlet pressure pd constant when subject to differing flow rates. Constant pressure control with max. pressure...

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Modulating control with two gas solenoid valves The gas outlet pressure pd is con­ rolled via the t air/gas ratio control with gas solenoid valve VAG. The gas outlet pressure pd follows the changing air control pressure psa. The ratio of gas pressure to air pressure remains constant. The VAG is suitable for a control range up to 10:1. The gas line is two Class A shut-off valves connected in series, in accordance with the requirements of EN 746-2. Modulating control with two gas solenoid valves and inlet pressure switch In this case, the minimum inlet pressure pu is monitored by the pressure...

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(VWVWVl uwww uuuuuuv uwww uwww .uuuuuuv wvww vwww vwww vwww uwww uuuuuuv uwww uuuuuuv vwww vwww vwww Staged flow rate control This application shows the VAH on a self recuperative burner. The pressure loss in the recuperator depends on the furnace or kiln temperature. When the furnace or kiln temperature is increased (at a constant air supply pressure), the flow rate drops. This change in the air flow rate is measured by the orifice and the VAH changes the gas volume accordingly. The air index (lambda) can be set using the fine-adjusting valve VMV. Continuous or staged flow rate control...

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Power consumption: Replacement possibilities for MODULINE pressure regulators with gas solenoid valve GVS, GVI, GVIB, GVR and GVRH are to be replaced by VAD, VAG, VAG+VAS, VAH and VAV Technical data Gas types: natural gas, LPG (gaseous), biogas (max. 0.1 %-by-vol. H2S) or clean air; other gases on request. The gas must be clean and dry in all temperature conditions and must not contain condensate. CE and FM approved, UL listed, max. inlet pressure pu: 10 - 500 mbar (4 - 200 "WC), FM approved (230 V AC, 120 V AC, 24 V DC), non operational pressure: 700 mbar (10 psig). ANSI/CSA approved (230...

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VAH, VRH Air control pressure psa: 0.6 – 100 mbar (0.24 – 40 "WC). Differential air pressure ∆psa (psa - psa-): 0.6 – 50 mbar (0.24 – 19.7 "WC). Differential gas pressure ∆pd (pd - pd-): 0.6 – 50 mbar (0.24 – 19.7 "WC). Maintenance cycles At least once per annum, at least twice per annum for biogas. If the flow rate drops, clean the strainer. Transmission ratio of gas to air: 1:1. Adjusting range at low fire: ±5 mbar (±2 "WC). VAV Outlet pressure pd: 0.5 – 30 mbar (0.2 – 11.7 "WC). Adjusting range at low fire: ±1.5 mbar (±0.6 "WC). Transmission ratio of air to gas: 0.6:1 to 3:1. Min....

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