Service - Various Chemical ( Touline,xylene,hexane,solvesso methanol, base oil)
Material - Cast Steel
Seal - Mechanical Seal
Flow rate - 250 m3/hr
Total Head - 8.5 bar
ISO 5199 will cover you, but I think you have to be careful in selection with methanol, ensure that all the wet components are methanolsafe
Try Dickow Pumpen