Esimeni esivulekile, akusekho ukuxhumana phakathi kwesihlalo se-valve kanye ne-disc seal, ngakho-ke kukhona ukugqokwa okuncane endaweni yokuvala.Njengoba isihlalo kanye nediski yamavalvu amaningi embulunga kulula ukulungisa noma ukushintsha izigxivizo ngaphandle kokukhipha yonke ivalvu epayipini, ifaneleka isikhathi lapho ivalvu nepayipi kushiselwa ndawonye.Lapho i-medium idlula kulolu hlobo lwe-valve, isiqondiso sokugeleza siyashintshwa, ngakho-ke ukumelana nokugeleza kwe-valve yembulunga kuphakeme kunokwamanye ama-valve.