Honeywell Eclipse 500605 3/4" Adjustable Limiting Orifice Valve ALO-3

V-port adjustable limiting orifice valve for controlling gas flow and air/gas ratio to burners with fine ratio adjustment. 3/4" valve size, 4.7 Cv. 40 PSI maximum inlet pressure. Gas capacities from 213 to 3122 cfh, depending on pressure drop.