EP-CM110GPV Water-Lubricated Oil-Free VSD Screw Air Compressor for PET Bottle Blowing

Full-Load Operation (Both Motors Active)

When blowing line demand reaches maximum — typically during high-speed rotary production at full cavity count — both 55 kW motors operate simultaneously. Combined VSD control ensures both operate at the most efficient speed point to deliver 8.2 m³/min at the pressure setpoint. Total output: 110 kW capacity, 8.2 m³/min.

Partial-Load Operation (Single Motor + VSD)

During mold changeovers, format transitions, or partial-speed production periods, one motor stages off completely while the other adjusts its VSD speed to supply only the flow required to maintain pressure. Electricity consumption drops to 40–70% of full-load depending on demand — with no manual intervention required.

Automatic Motor Rotation

The control system automatically alternates which motor takes primary load over time, distributing cumulative operating hours evenly between the two units. This rotation prevents accelerated wear on a single motor during extended partial-load periods and extends the maintenance interval for both units simultaneously.

Fault Redundancy

If one motor triggers a fault condition, the control system automatically switches full operation to the second motor within seconds, maintaining air supply at 50% maximum capacity. For most PET blowing configurations, this allows production to continue at reduced speed while the fault is investigated — preventing a complete line shutdown and the batch losses that accompany it.

Germany — Multi-Format PET Beverage Producer

Industry: Beverage  |  Application: 40 bar VSD air for rotary blowing line cycling 7 bottle formats across 3 shifts

"Our production schedule is highly variable — different bottle formats, different speeds, format changeovers every 4–6 hours. The EP-CM110GPV adapts to every scenario without manual adjustment. In the first 12 months, our compressed air electricity consumption dropped 31% versus the fixed-speed system it replaced. The SCADA integration via the 485 interface also gave our production team compressor visibility they never had before — pressure, flow, and fault status on the same screen as the blowing machine data."

★★★★★

Mexico — Large-Scale Purified Water Bottler

Industry: Purified Water  |  Application: 35–38 bar oil-free air for high-speed 16-cavity rotary PET blowing

"We run 18 hours per day, 6 days per week, with a 6-hour maintenance window. During the maintenance window our air demand drops to near-zero. With our previous fixed-speed compressor, it ran at full power through that window regardless. The EP-CM110GPV stages down to minimum speed during the window and consumes a fraction of normal electricity. Our operations manager calculated the payback on the VSD premium within 14 months of installation."

★★★★★

Saudi Arabia — Dairy & Juice Packaging Plant

Industry: Food & Dairy Packaging  |  Application: 38 bar Class 0 air for PET bottle blowing in 45°C ambient conditions

"Operating in 45°C ambient was our primary technical concern during the evaluation. The EP-CM110GPV's cooling system maintained stable performance throughout our hottest months. The water-lubricated technology keeps the compression chamber temperature at only ambient +15°C regardless of outside temperature — something dry oil-free systems struggle with in our climate. The dual-motor redundancy has also proven its value: one motor tripped during Ramadan production and the line continued at 60% capacity without interruption while the fault was cleared."

★★★★★