The Process piston includes wearbands designed for a 5 psi loading suitable for both lubricated and non-lubricated services. The piston ring and wearband materials are chosen to suit the Process gas, pressures and temperatures of each service.

Larger class cylinders utilize two wearbands located outboard of the piston rings while smaller cylinder classes have one wearband on the outboard end of the piston. The cylinder bore has been extended to allow for the travel of the wearbands.

Piston rod materials for Process Applications are: