At a glance
- Drive
- Electric motor
- Compression
- Two-stage oil-injected rotary screw
- Design ambient
- 40 °C (verify for site conditions)
Model range
MobilPower EM two-stage is one configuration within the MobilPower EM electric mobile family.
Drive
Electric motor
- Drive
- Electric motor
Compression
Two-stage oil-injected screw
- Compression
- Two-stage oil-injected screw
How To Choose
By flow and pressure
- START WITH
- Required FAD and discharge pressure
- THEN CHECK
- Electrical supply at point of work
- BEFORE A QUOTE
- Confirm voltage, frequency, phase with SIND
Technology
Technology Platform
MobilPower EM two-stage uses the same mobile platform as the MobilPower EM single-stage family: electric motor driving a rotary screw airend on a towable or skid frame, with cooling, control and protection. The difference is the compression: two-stage oil-injected rotary screw with intercooling, which extends the discharge pressure range beyond what single-stage mobile units can deliver.
Why Two-Stage for Mobile Electric?
Two-stage compression with intercooling extends the pressure range for mobile electric duties:
Key Design Decision: Electric Drive
No on-board engine means no fuel logistics, no exhaust aftertreatment and lower noise at the machine. Electric drive applies where a usable electrical supply exists at the point of work. The supply must be confirmed before order: voltage, frequency, phase, available short-circuit current and cable length all affect the machine configuration.
More technical detail
Why Two-Stage for Mobile Electric?
- Higher discharge pressure — two-stage machines can reach higher discharge pressures without approaching the temperature limit. This is required for duties like pipeline testing, high-pressure pneumatic tools and process air at elevated pressure.
- Better specific power — two-stage compression with intercooling brings the process closer to isothermal, reducing specific power at higher pressure ratios.
- Extended pressure band — single-stage mobile units are typically limited to 7–10 bar; two-stage can reach 13–15 bar or higher.
Mobile Platform Features
MobilPower EM two-stage retains the mobile platform features: tow ring or skid frame, lifting points, weatherproof enclosure, intake filtration, cooling, aftercooler, separator and drain, control panel. The machine moves with the work, but requires an electrical supply at each location.
Selection & quote checklist
- Higher pressure required — Beyond single-stage mobile range
- Electrical supply exists — At the point of work
- Noise or exhaust limit — Diesel unit cannot meet
- the exact model and configuration
- required operating pressure and flow
- electrical supply (voltage, frequency, phase)
Applications
Pipeline Testing
A pipeline construction project requires pneumatic testing at higher pressure. Electrical supply is available from a generator or site feeder.
Tunnel Construction
A tunnel construction project requires compressed air at higher pressure for pneumatic tools and testing. Electrical supply exists in the tunnel from the site feeder.
Plant Turnaround
A chemical plant requires temporary compressed air at higher pressure during a turnaround. Electrical supply exists from the plant switchgear.
Ownership & service
Energy, maintenance and service
Target Industries and Markets
MobilPower EM two-stage is specified where mobile compressed air is required at higher pressure and electrical supply exists:
- Pipeline testing — hydrostatic and pneumatic testing at higher pressure.
- Tunnel construction — where site electrical supply exists but the machine moves with the face.
- Plant turnaround — temporary air at higher pressure during maintenance.
- Port and quay — where electrical supply exists and noise/exhaust limits apply.
- Rail depot — temporary air for braking systems and testing.
How This Compares with Diesel Mobile
MobilPower EM two-stage removes the engine: no fuel logistics, no exhaust aftertreatment, lower noise at the machine, lower running cost per hour where electricity is cheaper than diesel. The trade-off is the requirement for a usable electrical supply at the point of work. Where no supply exists, MobilPower DM diesel-driven is the correct choice.
Specifications vary by configuration; confirm with the datasheet. Dimensions and weights are indicative; request the installation drawing for the specific model before designing foundations or access routes.
Reference data
Full specification and reference tables
- Higher pressure required — Beyond single-stage mobile range
- Electrical supply exists — At the point of work
- Noise or exhaust limit — Diesel unit cannot meet
- the exact model and configuration
- required operating pressure and flow
- electrical supply (voltage, frequency, phase)
- the current datasheet and package contents
-
EM two-stage or EM single-stage?
EM two-stage for higher discharge pressure beyond single-stage mobile range. EM single-stage for standard pressures (7–10 bar). Confirm the required pressure with SIND.
-
EM or DM (diesel)?
EM electric where a usable supply exists at the point of work. DM diesel where no supply exists. Then select on delivered flow and discharge pressure.
-
What electrical supply do I need?
Confirm voltage, frequency, phase, available short-circuit current and cable length. The machine must match the supply. Starting method (direct-on-line, star-delta, soft-start or VFD) depends on the supply capacity.
-
What happens at altitude?
Motor power and delivered air may be affected at altitude. Confirm the site altitude with SIND for derate.
-
Is 60 Hz available?
50 Hz standard. 60 Hz and other voltages on request.
