ASCO PRESSURE OPERATED VALVE 298 SERIES ASCO VALVE 298 2/2NO TAPPED STAINLESS STEEL G/RP PN40 DN20 OPERATOR D=100 Option 666322 ( ACCESSORY AND SPARE PART FOR ASCO VALVE 298 AND 398 SIGNALLING BOX MOUNTED ON VALVE 298-398 PILOTING GAS 2 MECHANICAL SWITCHES DN20-25 OPER.100 (SM2) )