175 PSI maximum operating pressure for applications requiring higher air capacity and pressure. Double stage, cast iron pump design delivers higher pressure and increased air delivery. Critical components of the crankcase, crankshaft and cylinders are cast iron for reliability and durability in demanding industrial environments. Precision machined aluminum head and valve system dissipates heat quicker for long-lasting performance. Head and valve plate design features high temperature O-rings for leak-proof, high-pressure sealing. Two-piece connecting rods include needle bearings for high load capabilities and long life. Ductile iron crankshaft is machined and balanced for smooth, low vibration operation. Pistons feature a three-piece ring set that prevents oil from entering the air stream. Fully enclosed metal belt guard assures safe operation.