Isethi yonke yesistimu yokusabela ihlanganiswe kuhlaka lwensimbi engagqwali.I-valve yokudla ye-PO/EO igxilile ohlakeni ukuze kuvinjelwe ukulinganisa isikali sika-elekthronikhi ukuthi singathinteki phakathi nokusebenza.
Isistimu yokusabela ixhunywe nepayipi lensimbi engagqwali namavalvu enaliti, okulula ukunqanyulwa nokuxhunywa kabusha.