Lo mvalo webhola elintanta onamaphiko amabili uklanywe futhi wakhiwa ngokuqinile ngokuvumelana nezindinganiso ze-API 6D kanye ne-ASME B16.34. Umzimba womvalo wenziwe ngokucwiliswa ngokunembile nge-CF8 (okulingana nensimbi engagqwali i-304), uhambisana nesihlalo esithambile se-PTFE ukuze kutholakale ukuvala okungangeni moya. Indawo yokufaka i-actuator ehambisana ne-ISO ibekwe esembozweni, isekela ukuhlanganiswa okuqondile kwama-actuator kagesi noma omoya ukuze kulawuleke ngokuzenzakalelayo. Inhliziyo yebhola idinga ukujikeleza okungu-90° kuphela ukuze kuqedwe izenzo zokuvula nokuvala ipayipi ngomzuzu ophansi wokusebenza.