PRESSURE OPERATED ASCO VALVE SERIES 290 VALVE 2/2 NC STAINLESS STEEL ENTRY UNDER DISC G 1/2 D=15 OPERATOR D=50 PILOT PRESSURE 4 BAR + option666055 ( LENGTHENING STEM FOR SIGNALLING BOX MOUNTED ON VALVE MECHANICAL SWITCH 290 DN 15-25 T 50 ) + Option 666004 ( SIGNALLING BOX MOUNTED ON BRONZE AND STAINLESS STEEL VALVE 2.INDUCTIVE SWITCHES (SI2) )