Slurry pump volute seals
There are two volute seals of a slurry pump, one is between the volute and throat bush(code as 124), the other is in the middle of frame plate liner insert and volute(code as 125)
Check the bellow picture to know more

slurry pump volute seals

Natural Rubber
EPDM Rubber
Nitrile Rubber
Chlorosulfonated Polyethylene
Customized material as you required