Ifanele amavalvu asuka ku-6mm (4in) kuya ku-101mm (4in) ububanzi, afanele amapayipi avaleleke namabanga aseduze (1/4in).
Umsebenzi
Idivayisi yokukhiya iyisisetshenziswa sokukhiya ukuphepha kwezimboni esibamba okokusebenza endaweni ephephile futhi sihlale sivaliwe. Isetshenziselwa ukuvimbela ukusebenza ngengozi okungase kuphumele ekulimaleni noma ekufeni, futhi omunye umgomo uwukuba yisixwayiso.
Incazelo: I-valve lock isetshenziselwa ikakhulukazi ukukhiya i-valve ukuvikela ukuphepha kwe-valve.
Ama-valve: okhiye be-valve yebhola, izingidi zama-valve ezivamvane, izingidi zama-valve esango, izingidi zamavalvu ezijikelezayo, izingidi zama-valve ezisebenzayo, njll.