Nekuda kwesarudzo yekuvhara zvinhu ndeye EPDM kana NBR.Iyo yakapfava seal gedhi vharuvhu inogona kuiswa pane yakanyanya tembiricha ye80 ° C.Kazhinji inoshandiswa mumapaipi ekurapa emvura emvura uye tsvina yemvura.Soft sealing gedhi mavharuvhu anowanikwa mune akasiyana dhizaini zviyero, seBritish Standard, German Standard, American Standard.Nominal pressure yesoft gedhi valve is PN10,PN16 kana Class150.