Based on the attached chart:
Center/Body material - Aluminium
Fluidcap/Manifold material - Polypropylene
Seat material - Polypropylene
Ball material - Santoprene
Diaphragm material - Santoprene
ARO® Air Operated Double Diaphragm Pumps allow you to pump thick, solids-laden liquids and slurries in applications such as mining and dewatering. Units are lightweight, can be easily transported where needed, and equipped with pneumatic operation to reduce exhaust and spark hazards. Models with an unbalanced air valve and independent pilot rod are designed to help prevent stalling, sticking, centering, and freezing. Self-priming pumps are capable of running dry.