ACS EC-15 Two-Stage Air Compressor Pump, 15 HP, 47 CFM at 175 PSI

The EC-15 is the 15 HP pump at the top of the ACS E Series, a three-cylinder W-pattern cast-iron two-stage built on the Schulz MSW 60 MAX casting. Two low-pressure cylinders feed one high-pressure cylinder through the intercooler, and the result is 47 CFM at 175 PSI at 1065 RPM. The W layout matters here: spreading the first stage across two bores keeps piston speed and discharge temperature down at a flow where a twin would be working hard.

Key specifications

• Horsepower: 15 HP
• Delivery: 47 CFM at 175 PSI
• Speed: 1065 RPM
• Stages and cylinders: 2 stage, 3 cylinder W pattern
• Construction: cast iron
• Motor frame: suitable for 254T frame motors
• Weight: 325 lb
• Schulz model reference: MSW 60 MAX

Sizing the drive

This is a bare pump and ships without motor, guard, tank or controls. Pair it with a 15 HP motor in a 254T frame and size the sheaves for 1065 RPM at the pump. At 15 HP the belt drive is doing real work, so use a matched multi-belt set and check alignment and tension after the first few hours of run time.

Service notes

A 47 CFM two-stage puts serious heat into the intercooler, so keep the cooler tubes, the flywheel fins and the belt guard airflow clear, and give the pump room to breathe cool air. Replace the check valve and belts whenever you replace a pump, and clean or replace the discharge tube between pump and tank. Stay on the manufacturer's oil interval and keep a fresh intake filter on it.

Typical applications

Larger stationary shop and plant air systems, fabrication and welding shops, production and assembly air, fleet and heavy truck service, and as a replacement pump on any 15 HP 175 PSI two-stage package taking a 254T frame motor.

The ACS EC-15 two-stage air compressor pump delivers 47 CFM at 175 PSI on 15 HP, in 3-cylinder W-pattern cast iron at 1065 RPM, as a bare-pump replacement on 254T frame packages.