Amavalvu ovemvane asetshenziswa ezintweni ezehlukene ezifana nezindawo zokuhlanza amanzi, ukucubungula ukudla, izitshalo zamakhemikhali, njll. Lawa mavalvu anomthelela ekusebenzeni kwalezi zimboni ngesikhathi esalinde ukuthunyelwa.Isibonelo, endaweni yokuhlanza amanzi, lapho indima eyinhloko yama-valve iwukulawula ukugeleza kwamanzi, isikhathi sokuphumula ngenxa yama-valve angatholakali kungabangela ukutholakala kwamanzi ahlanzekile okwanele, okungaba yingozi empilweni yomuntu.

I-Nortech ingomunye wabakhiqizi abahamba phambili bamavalvu ezimbonini e-China abanesitifiketi sekhwalithi ye-ISO9001.