Bitewe no guhitamo ibikoresho bifunga ni EPDM cyangwa NBR. Irembo ryoroshye rya kashe irashobora gukoreshwa mubushyuhe ntarengwa bwa 80 ° C. Mubisanzwe bikoreshwa mumiyoboro itunganya amazi kumazi n'amazi. Irembo ryoroshye ryo gufunga amarembo riraboneka muburyo butandukanye bwo gushushanya, nk'Ubwongereza, Ikidage, Ikidage cy'Abanyamerika - Umuvuduko w'izina rya valve yoroheje ni PN10, PN16 cyangwa Class150.