PART NO. 19 PART NO. 21 PART NO. 91 KAN24603 1111 10NF AIR MAX MT20-S4 "1 ""BW 10nF PN25" "DN50 PN16 / 40 "DN20 PN40 10nF 3/4""" KIT FOR ALFAT3 FB FILTER REGULATOR ALFA 60 and ALFA T3FB ALFA 24K, size 1/2 in NPT;ball valve GTVN.83 x 90.TP17A-K4 11008 (Sealing kit for ALFA 10N/NF DN 40, TFM 1600 KEA30801 ALFA 20R (KA603209) (stock)