mechanical shaft seal parts: mechanical seals and pump shafts
Double face mechanical seals with silicon carbide seal face vs silicon carbide seal ring and o-rings and single springs.

In mining applications, portable submersible pumps are usually preferred.The large, main pumps in mines are usually made of cast iron. Mechanical seals have to be resistant to corrosion and friction so pressureless sintered silicon carbide/ssic should be taken into consideration as the working faces and rings and the metal parts should be at least 316L instead of 304