I-Valve ye-Brass Spring yokuHlola yenziwe ngobhedu olubunjiweyo, olukwabizwa ngokuba yivalve engabuyiyo, eyenzelwe ukulawula umva wenkqubo yokulawula ulwelo, ulwelo lulawulwa yidiski kwaye luqukuqela kwicala elinye, lusetyenziswa ngokubanzi kwimibhobho, ukupompa, kunye nemibhobho.