VFD SERIES

Variable Frequency Drive Electric Compressors

15-450 HP

Expertly engineered to save energy and cut consumption costs, the Variable Frequency Drive (VFD) Series compressors supply the exact amount of air each shift requires. No more, no less. The VFD’s are some of the many industrial electric compressed air solutions offered by Sullivan-Palatek.

Features & Benefits

  • Wide power range for 208V, 230V, 460V, and 575V
  • Pressure transducer motor speed control
  • Factory Settings:
    • Programmable digital outputs
    • Digital inputs
    • Programmable outputs: four relays, four transistors
    • Eight programmable parameter sets with S-curves, power off function, PID process controller, electronic motor protection, internal timer. Output frequencies up to 160 Hz with output voltage stabilization; switching frequencies up to 16kHz; output phase monitoring.
    • DC bus circuit connection, moto thermal sensor connection, hardware current line
  • The VFD helps reduce energy. Operating at 70% capacity, the VFD consumes 10% less power than a standard compressor operating with on-off control and 20% less than a compressor with modulating control.
  • The VFD has a soft start feature that maintains a low starting current. It reduces stress on the site power supply and also reduces motor wear.
  • The VFD system complies with the Electro-Magnetic Compatibility standard and is UL/CSA listed.
  • The VFD system is not limited to a fixed number of starts per hour.
Model Horsepower (hp) Capacity (cfm)

at 100 Pressure (psi)

Capacity (cfm)

at 125 Pressure (psi)

Capacity (cfm)

at 150 Pressure (psi)

D-15VFD 15 63 65 43
D-20VFD 20 95 80 60
D-25VFD 25 120 105 84.5
D4-25VFD 25 120 90 84.5
D-30VFD 30 150 120 100
D-40VFD 40 190 165 130
UD-25VFD 25 150 123 100
UD-30VFD 30 150 130 100
UD-40VFD 40 190 165 130
UD-50VFD 50 204 201 170
UDG-50VFD 50 204 201 170
UD-60VFD 60 320 285 255
SP16-75VFD 75 346.2 338 280
SP16-100VFD 100 485.2 440.1 N/A
SP16-125VFD 125 580 535 480
SP20-125VFD 125 630 555 490
SP20-150VFD 150 740 685 610
SP20-200VFD 200 980 861.5 810
SP20-250VFD 250 1140 1065 960
SP20-300VFD 300 1150 1145 1140
SP32-300VFD 300 1500 N/A N/A
SP32-350VFD 350 1650 1566 N/A
SP32-400VFD 400 1925 1633 1533
SP32-450VFD 450 1910 1770 1633

All Industrial facilities

Infrastructure

Power generation

Pump and pulp

Cement

  • Water cooled
  • Tank mounted
  • Acoustical enclosure
  • Lubricant: factory fill with Pallube 32, Pal-Extra 44, AFX 32, or Food Grade lubricant
  • TEFC motor
  • Cold weather/low ambient package
  • Separator trap: Captures and automatically drains condensed water, oil, and dirt