Ivalvu yeplagi ifanelekile ukunqunyulwa nokuthuthwa komoya kwipayipi, ngenxa yesakhiwo sayo esilula, inenzuzo yokuvula nokuvala ngokukhawuleza. Kolu ngcelele, i-NSEN inokubonelela ngohlobo olungaqhelekanga, uhlobo lwesingxobo kunye ne-Inverted Pressure Balance kunye nohlobo lwe-Lubricated. Wamkelekile ukuqhagamshelana nathi ukuze ufumane isipho okanye wenze ngokwezifiso ivalvu yeprojekthi yakho.