PRESSURE OPERATED ASCO VALVE SERIES 290 VALVE 2/2 NO BRONZE ENTRY UNDER DISC G 1 1/2 D=40 OPERATOR D=63 + GD2 ( ATEX CATEGORY 2 FOR VALVE 290-390 SUFFIX GD2 OPERATOR D=63 : NC-NO) + SH2 ( SIGNALLING BOX MOUNTED ON BRONZE AND STAINLESS STEEL VALVE 2 INTRINSICAL SAFETY SWITCHES ) + ( LENGTHENING STEM FOR SIGNALLING BOX MOUNTED ON VALVE INTRINSICALLY SAFE SWITCH 290 DN15-20-25 D=50 )