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.