1. Ii-valve ye-actuator kagesikufanele igcinwe ekamelweni elomile nelingena umoya, futhi izingxenye ezimbili zomzimba we-valve kufanele zivalwe.

2. Ukugcinwa kwesikhathi eside kwama-valve kagesi kufanele kuhlolwe njalo ukuze kukhishwe ukungcola futhi kusetshenziswe amafutha aphikisana nokugqwala endaweni yokucubungula.

3. Ngemuva kokufakwa, kufanele ihlolwe njalo, izinto zokuhlola eziyinhloko:

(1) Hlola ukuthi indawo yokuvala ilungile ngokuphelele yini

(2) Ngemuva kokuhlanganiswa, i-valve kufanele ihlolwe ukusebenza kokuvala.

(3)Hlola ukonakala kwesiqu ne-stem nut of valve.Uma kukhona umonakalo, buyisela ngesikhathi.

(4)Hlola ukuthi ukupakisha kuphelelwe yisikhathi yini, bese kushintshwa uma konakele.