How much energy can VSD save?

VSD adjusts motor RPM to match demand, commonly saving 30–50% versus fixed-speed load/unload units in variable-demand applications.

Is it suitable for constant demand?

Yes. While VSD excels with fluctuating profiles, the inherent efficiency of the two-stage design offers strong performance even at steady loads.

Depending on energy tariffs and run hours, many sites see ROI in 18–36 months from energy savings alone; reduced maintenance and downtime can improve this further.

Two-Stage • VSD • Industrial Grade

DHH Two-Stage VSD Rotary Screw Air Compressor

Name: Two-stage Inverter VSD Screw Air Compressor DEHAHA Rotary Screw Air Compressor Air Compressor
Brand: PH Engineering & Machinery Sdn Bhd

A paradigm shift in efficiency: two-stage compression + variable speed drive for lower specific power, tighter pressure control, and superior reliability.

Energy Savings

30–50%

Pressure Stability

±0.1 bar

Duty Cycle

24/7

Intercooling Low Inrush Current Remote Monitoring-Ready

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DHH Two-Stage VSD Rotary Screw Air Compressor

Why Choose the DHH Two-Stage VSD?

A synergistic combination of two-stage compression and variable speed drive delivers measurable business impact.

Efficiency

Lower Specific Power

Two compression stages with intercooling approach isothermal compression, reducing energy per unit of air produced.

Control

Tight Pressure Band

VSD maintains a narrow pressure window for consistent process quality and reduced waste from over-pressurization.

Reliability

Cooler Operation

Staged compression lowers internal temperatures, extending airend, bearing, and lubricant life for higher uptime.

Savings

30–50% Energy Reduction

VSD matches output to demand, removing wasteful unload running and reducing electricity costs significantly.

Power Quality

Soft Starts

Lower inrush current minimizes grid stress and possible penalties while protecting electrical components.

Smart

Intelligent Controls

Real-time monitoring, diagnostics, and scheduling; remote connectivity options for proactive maintenance.

Built for Demanding Applications

Ideal where efficiency, uptime, and quality air are non-negotiable.

Manufacturing

Automotive

Electronics

Textiles

Food & Beverage

Pharmaceuticals

Mining & Construction

General Industry

Technical Specifications

Illustrative series and values; confirm final configuration with your DHH distributor.

Model Series	Power Range (kW / HP)	FAD Range (m³/min / CFM)	Max Pressure (bar / psi)	Specific Power (kW/m³/min)	Noise Level dB(A)	Energy Savings vs. Fixed
DHH VSD-T1	37–75 (50–100)	6.5–13.5 (230–480)	7–12 (100–175)	4.8–5.2	68–72	Up to 35%
DHH VSD-T2	90–160 (125–215)	15.0–28.0 (530–990)	7–12 (100–175)	4.6–5.0	70–74	Up to 35%
DHH VSD-T3	185–355 (250–475)	30.0–62.0 (1060–2200)	7–12 (100–175)	4.5–4.9	72–76	Up to 35%

* Specific power indicates energy used per unit of compressed air — lower values signify higher efficiency.

Frequently Asked Questions

Staging with intercooling improves isothermal efficiency, reduces thermal stress, and lowers specific power for the same output — saving energy and extending component life.

In variable-demand profiles, 30–50% reductions in energy use are common versus fixed-speed load/unload operation, thanks to precise RPM control matching actual demand.

Yes. The two-stage design’s inherent efficiency and lower specific power keep performance strong even at steady loads, often beating single-stage fixed-speed units.

Replace air filters per schedule, use approved oils and change on time, keep coolers clean, lubricate motor bearings as specified, fix air leaks, test drain traps, and inspect electrical connections periodically.

Ready to size the right DHH Two-Stage VSD for your plant?

Share your flow (m³/min), pressure (bar), duty cycle, ambient, and target efficiency — we’ll recommend an optimal model.

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Industrial Compressed Air Systems and Solutions

Industrial Compressed Air Systems and Solutions

Two-stage Inverter VSD Screw Air Compressor DEHAHA Rotary Screw Air Compressor Air Compressor

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DHH Two-Stage VSD Rotary Screw Air Compressor