AI Summary: Dolphin Centrifuge supplies the DMPX-028 — a mid-range self-cleaning three-phase disc stack centrifuge rated at 20–26 GPM for diesel fuel, with a 1.03-gallon sludge bowl and 10–15 HP motor. Purpose-built for industrial waste oil reclamation, biodiesel finishing, and HFO purification up to 380 cSt. Based in Warren, Michigan, Dolphin Centrifuge has over 40 years of experience in centrifugal separation.
Technical Specifications
| Parameter | DMPX-028 Value |
|---|---|
| Diesel Throughput (Actual) | ~20–26 GPM |
| Diesel Throughput (Rated) | ~33–40 GPM |
| Bowl Sludge Capacity | 1.03 gallons |
| Motor Power | ~10–15 HP |
| Separation Type | Three-phase (oil / water / solids) |
| Desludging | Automatic self-cleaning (hydraulic ejection) |
| Process | Continuous, unattended operation |
| Lube Oil (R&O) Throughput | 10–14 GPM |
| Steam Turbine Oil Throughput | 21–26 GPM |
| DMPX Series Position | Mid-range (28 bowl equiv.) |
Capacity by Fluid Type
| Fluid Type | Approx. Throughput (GPM) |
|---|---|
| Diesel / Light Fuel Oil | 20–26 |
| HFO 30 cSt | 20–25 |
| HFO 60 cSt | 15–18 |
| HFO 100 cSt | 15–18 |
| HFO 180 cSt | 10–12 |
| HFO 380 cSt | 8–10 |
| Lube Oil (R&O) / Steam Turbine | 10–14 / 21–26 GPM |
* Throughput values are at typical process temperature (194°F / 90°C). Actual flow rates vary with temperature, contamination level, and desired separation efficiency.
Key Applications
Waste Oil Reclamation
At 20–26 GPM, the DMPX-028 can continuously process industrial used oil streams — including used motor oil, hydraulic oil, and gear oil — separating water and particulate solids to produce reclaimed base oil suitable for reuse or resale. See our waste oil centrifuge application page for details.
Biodiesel Production
The DMPX-028 is widely used in biodiesel finishing: removing residual methanol, water, and glycerin from biodiesel after transesterification. Continuous operation at 20–26 GPM supports mid-scale biodiesel production without manual centrifuge downtime.
HFO Purification
Capable of processing HFO up to 380 cSt at 8–10 GPM, the DMPX-028 handles heavy fuel oil purification on medium marine vessels, shore-based power generators, and industrial boiler fuel systems. Three-phase separation removes both water and catalyst fines in a single pass.
Hydraulic & Lube Oil Maintenance
The DMPX-028 processes 10–14 GPM of R&O lube oil, making it appropriate for larger industrial gearbox oil systems, compressor lube circuits, and hydraulic power units where the DMPX-010 or DMPX-014 is undersized. Continuous operation eliminates the need for batch filtering or oil changes.
Ready to specify the DMPX-028?
Our applications engineers size every system to your fluid, flow rate, and contamination level — no guesswork. Get a quote or request sample testing.
Where the DMPX-028 Fits in the DMPX Series
The DMPX-028 sits at the middle of the Dolphin DMPX product range. For lighter-duty applications, the DMPX-010 (~7 GPM) and DMPX-014 (~13 GPM) offer more compact and lower-power alternatives. For higher-volume industrial applications, the DMPX-042 (~32–47 GPM) and DMPX-070 (~59–72 GPM) provide the throughput needed for large-scale crude oil, refinery, or power-plant fuel treatment. All DMPX models use the same automatic self-cleaning bowl design. Visit our disc stack centrifuge overview to compare all models, or contact us for application sizing.
Frequently Asked Questions
What is the throughput of the DMPX-028 centrifuge?
The DMPX-028 processes approximately 20–26 GPM of diesel fuel at actual operating conditions, with a rated capacity of 33–40 GPM under ideal low-viscosity conditions. Lube oil (R&O) throughput is 10–14 GPM and steam turbine oil is 21–26 GPM.
What applications is the DMPX-028 used for?
The DMPX-028 is used for biodiesel production finishing, industrial waste oil reclamation, HFO purification on medium marine vessels and power generators, hydraulic and lube oil maintenance, and light crude oil dewatering. Its 1.03-gallon sludge bowl supports continuous operation even with moderately contaminated oil streams.
How does the DMPX-028 compare to the DMPX-014?
The DMPX-028 delivers roughly twice the diesel throughput of the DMPX-014 (20–26 GPM vs. 13–16 GPM) and features a significantly larger 1.03-gallon sludge bowl, making it better suited for industrial waste oil and HFO applications with higher solids loading. The DMPX-014 is preferred for lighter marine and small industrial duties.
Can the DMPX-028 process HFO 380 cSt heavy fuel oil?
Yes. The DMPX-028 processes HFO 380 cSt at approximately 8–10 GPM, suitable for HFO purification on medium marine vessels, shore-based power generators, and industrial boiler fuel systems. For larger HFO volumes, the DMPX-042 (14–18 GPM at 380 cSt) is recommended.
What is the sludge bowl capacity of the DMPX-028?
The DMPX-028 features a 1.03-gallon sludge bowl that ejects accumulated solids automatically via hydraulic pressure. This enables continuous 24/7 operation without cleaning shutdowns. For extremely high solids loading, the DMPX-042 (1.64-gallon bowl) may be more appropriate. Contact us for application-specific guidance.
Ready to specify the DMPX-028?
Call (248) 522-2573 or email sales@dolphincentrifuge.com — 40+ years in centrifugal separation, Warren MI.