EMAX APP4V2598TP 25HP 98CFM Displacement 2 Stage Pump Pressure Lubricated Reciprocating Bare Pump w/flywheel

This Emax 25 HP, 4 Cylinder, 2-Stage, air compressor pump has 98 CFM Displacement. 

This pump is ALL CAST IRON, (not aluminum).  It has solid cast iron cylinder, cylinder heads, crankcase, flywheel, crank, and forged steel connecting rods – not aluminum!  These rods also have a replaceable bearing on the crank journal and on the wrist pin journal.  This is what most of the competition do not have.

This pump has large Timken-Style roller bearing on the crank ends on each end of the crankshaft.  This ensures good crank stability and long compressor bearing life.  Each cylinder is all cast iron with no sleeves or aluminum.  All cast iron prevents cylinder distortion and egg-shaped cylinders when pump gets hot.  This pump has 2 B-Section belt drive. Twin belt ensures better belt gripage and longer belt life.  This pump has head unloaders.  This is very nice for continuous run applications such as gasoline driven or electric driven high duty cycle applications.  Head unloaders are an air cylinder in each head.  When air is applied to them, they open or push the intake valves open allowing the pump to go into a free wheel mode.  The cylinders are still moving in a free wheel mode, but it cannot compress the air because the intake valve is held open.  This pulls cool air into the cylinder.  The cool air absorbs the heat in the pump and blows it back out the intake valve.  This is nice when you are sandblasting, etc., under heavy duty cycles.  This pump has a site glass to view your oil level.