Your fixed-speed compressor, thinking on its feet.
Production demand never sits still, and with Eskom tariffs climbing, neither should your compressor’s output. Demand=Match adds real-time intelligence to your existing fixed-speed ELGi compressor, so it only delivers the air your plant is actually using, right now.
Built for how South African plants actually run
Most compressor rooms we service in Gauteng and KwaZulu-Natal run fixed-speed machines that were sized for peak demand — but peak demand is rare. The rest of the time, that compressor is fighting itself.
The Problem On Your Plant Floor
- Fixed-speed screw compressors are built to run flat-out, but shift changes, tooling swaps and line stoppages mean demand swings constantly.
- Every load/unload cycle is a jolt to the motor and airend, accelerating wear and shortening service intervals.
- Oversized systems idle at partial load for most of the day, burning kWh you’re paying Eskom or your municipality for regardless.
- A full VFD retrofit fixes this; but the capital outlay is hard to justify on an older, still-serviceable machine.
Reciprocating Air Compressors
- Fits onto your existing fixed-speed ELGi compressor; no new machine, no VFD, no re-piping.
- Continuously re-circulates airflow inside the compressor so output tracks plant demand in real time.
- Narrows the pressure band, so the compressor cycles less and holds a steadier line pressure.
- Delivers VFD-like responsiveness at a fraction of the capital cost; a retrofit, not a replacement.
System Pressure
What changes at the gauge
Without Demand=MATCH
With Demand=Match
Cut-In Pressure
Cut-Out Pressure
System Pressure
What it's worth on your energy bill
These are ELGi’s tested performance figures for the Demand=Match system, IAS backs them with local commissioning and monitoring.
17% max
Energy Savings
Achieved in the 50–95% load range, where most plants spend the majority of their operating hours.
Fewer cycles
Less Mechanical Stress
Reduced load/unload cycling means lower strain on the airend and motor, and fewer unplanned callouts.
Days, not months
Fast Retrofit
Installed on your existing compressor on site, no production downtime waiting on a replacement unit.
Lower carbon
Sustainability Gains
Less wasted energy per Nm³ delivered supports ESG and carbon-reporting commitments.
R capital-light
Affordable Upgrade
A fraction of the cost of a new VFD-driven compressor, with a payback period most plants can justify quickly.
On-site support
Backed Regionally
Commissioned and serviced by IAS technicians from our Boksburg and Pinetown branches, not a call centre abroad.
20 years keeping Southern African plants running
We’ve supplied and supported the ELGi range across Gauteng and KwaZulu-Natal since 2005. Demand=Match is fitted, commissioned, and monitored by our own technicians, the same team you already call for service and parts.
Suited For Applications Across These Industries
Automotive
Compressors power tools and assembly lines, boosting productivity and efficiency in automotive manufacturing.
Food and Beverage
Compressors ensure safety and efficiency, meeting stringent hygiene standards in food and beverage production.
Textiles
Essential for precise machinery operation, compressors optimize performance in textile manufacturing.
Packaging
Compressors drive machine efficiency, essential for reliable packaging across industries.
Not sure if your compressor is a fit?
Our technicians can log your plant’s actual demand profile and show you, in real numbers, what Demand=Match would save before you commit to anything.