1. VAD: Regulators with solenoid valves are designed for shut-off, 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.

• Outlet pressure pd:
• VAD..-25: 2.5–25 mbar (1–10 "WC),
• VAD..-50: 20–50 mbar (8–19.7 "WC),
• VAD..-100: 35–100 mbar (14–40 "WC).

2. VAG/ VAV : Air/gas ratio control, Class A, for maintaining a constant air/gas pressure ratio for modulating controlled burners . The pressure is preset by the air control line.

VAG

• Outlet pressure pd: 0.5–100 mbar (0.2–40 "WC).
• Air control pressure psa: 0.5–100 mbar (0.2–40 "WC)
• The inlet pressure must always be higher than the air control pressure psa + pressure loss Δp + 5 mbar (+ 2 "WC).
• VAG..K: 1 1/8" coupling for plastic hose (internal dia. 3.9 mm (0.15"), external dia. 6.1 mm (0.24")), VAG..E: 1 1/8" coupling with compression fitting for 6 x 1 tube, VAG..A: 1 NPT 1/8 adapter, VAG..N: zero governor with breathing orifice

VAV

• Outlet pressure pd: 0.5–30 mbar (0.2–11.7 "WC). Air control pressure psa: 0.4–30 mbar (0.15–11.7 "WC). Combustion chamber control pressure psc: -20 to +20 mbar (-7.8 to +7.8 "WC).
• The inlet pressure pu must always be higher than the air control pressure psa x transmission ratio V + pressure loss Δp + 1.5 mbar (0.6 "WC).

3. VAH, VRH: Flow rate regulators VAH and VRH are used to maintain a constant gas/air ratio for modulating-controlled and stage-controlled burners. The gas flow rate is controlled proportionally to the air flow rate. In addition, flow rate regulator VAH is designed as a gas solenoid valve and shuts off the gas or air supply safely.

• The inlet pressure must always be higher than the differential air pressure Δpsa + max. gas pressure on burner + pressure loss Δp + 5 mbar (+ 2 "WC). Differential air pressure Δpsa (psa - psa-) = 0.6 – 50 mbar (0.24 – 19.7 "WC). Differential gas pressure Δpd (pd - pd-) = 0.6 – 50 mbar (0.24 – 19.7 "WC). Adjusting range at low fire: ±5 mbar (±2 "WC). Connection of air control pressure psa: 3 1/8" couplings with compression fitting for 6 x 1 tube.
• Electrical data Mains voltage: 230 V AC, +10/-15%, 50/60 Hz; 200 V AC, +10/-15%, 50/60 Hz; 120 V AC, +10/-15%, 50/60 Hz; 100 V AC, +10/-15%, 50/60 Hz; 24 V DC, ±20%.

4. Genral Standards:

• EN 161:2011+A3:2013
• EN 88-1:2011+A1:2016 –
• EN 126:2012
• EN 1854:2010
• SIL 3
• FM
• ANSI/CSA approved
• UL listed (for 120 V only)
• AGA approved