Engineered to be both dependable and versatile, the D-Series industrial electric direct drive rotary screw air compressor is one of many energy-efficient solutions developed by Sullivan-Palatek. The D-Series compressors are offering a range of 15-40 hp. They are equipped with an easily readable microprocessor, a coupling and air end mounted to the motor C-face. It utilizes a sizeable oversized separator element & sump tank as well as easily replaceable oil & air intake filters. With their compact size and high reliability, these machines are ideal for smaller industrial settings such as automotive shops, small machining facilities, and fabrication facilities.
The D-Series compressors utilize many easily accessible parts, making the overall cost of ownership much lower than many of our competitors.

Features & Benefits
- Microprocessor controller with sequencer, lead-lag, and remote monitoring for up to 8 machines
- Motor with Totally Enclosed Fan-Cooled (TEFC) enclosure type for indoor and outdoor use
- The motor starter has a water-tight, dust-tight, sleet resistant NEMA 4 enclosure for indoor and outdoor use
- The air end, manufactured by Sullivan-Palatek, has advanced rotor design features; oversize radial thrust bearings, and precision working rotary screws that provide virtually no wear
- Protective devices include class 20 solid-state overload relay, high temperature and overpressure shutdown switches, and anti-restart pressure switch preventing starting while air compressor is pressurized
- Coupling and drive: the compressor is flange mounted to motor C-face for positive alignment and directly coupled for increased efficiency
- Cooling system equipped with double pass air-cooled aftercooler with thermostatic control for maintaining the appropriate oil operating temperature within 15 degrees of ambient
- Using oversized coolers allows for greater cooling performance at high temperatures
- Oversized dry type air intake filter with easily replaceable elements
- One-piece lube fill elbow and level sight glass, a vented cap for pressure release when removing
- Inlet/check valve features a one-piece housing for dependable performance and complete modulation
Model | Horsepower (hp) | Capacity (cfm) | Pressure (psi) | Motor Speed (rpm) |
---|---|---|---|---|
D-15 | 15 | *50.1 | 125 | 1750 |
D-H15 | 15 | 46.5 | 150 | 1750 |
D-20 | 20 | *80.2 | 125 | 1750 |
D-H20 | 20 | 79.1 | 150 | 1750 |
D-HH20 | 20 | 53 | 175 | 1750 |
D-25 | 25 | *105 | 125 | 3550 |
D-H25 | 25 | 92 | 150 | 3550 |
D-HH25 | 25 | 80 | 175 | 3550 |
D4-25 | 25 | *84.8 | 125 | 1750 |
D4-H25 | 25 | *81.9 | 150 | 1750 |
D4-HH25 | 25 | 74 | 175 | 1750 |
D7-30 | 30 | 105 | 125 | 3550 |
D7-H30 | 30 | 103 | 150 | 3550 |
D-40 | 40 | 166 | 125 | 3550 |
D-H40 | 40 | 103 | 150 | 3550 |
D-HH40 | 40 | 100 | 175 | 3550 |
- Manufacturing
- Small Industrial Settings
- Automotive Shops
- Small Machining Factories
- Fabrication Workshops
- Food and Beverage
- Hospitals
- Water cooled
- Tank mounted:
- ASME coded 80, 120, and 200 gallon with auto drain
- Platform mounted:
- 19″ high to keep your unit off the ground and for easy maintenance
- Acoustical enclosure:
- Acoustical enclosure: Easy removable panels for faster maintenance and accessibility while keeping it quiet
- Lubricant:
- Lubricant: factory fill with Pallube 32, Pal-Extra 44, AFX 32, or Food Grade lubricant
- Wye-Delta and Solid States starters
- Air filter pop up indicator
- Deluxe gauge panel:
- Line pressure gauge, discharge pressure gauge, hourmeter, temperature gauge, lube filter and separator element diffenential gauges
- HATD shutdown switch:
- Shuts the compressor if high discharge air temperatuer are sensed
- Cold weather/low ambient package
- Separator trap:
- Captures and automatically drains condensed water, oil, and dirt
- VFD
- Variable Frequency Drive option, for more information, click here
*Capacity in accordance with CAGI / ISO 1217 (Annex C / Annex E)