ASCO PRESSURE OPERATED VALVE 398 SERIES ASCO VALVE 398 3/2 U TAPPED STAINLESS STEEL BODY G/RP PN40 DN20 OPERATOR D=100Option 666322 ( ACCESSORY AND SPARE PART FOR ASCO VALVE 298 AND 398 SIGNALLING BOX MOUNTED ON VALVE 298-398 PILOTING GAS 2 MECHANICAL SW