The Danfoss PAHT 308 (code 180B1002) is an axial piston high-pressure pump for demineralised and technical water at high pressure. It is oil-free and water-lubricated — the pumped water itself lubricates the bearings, so there is no oil circuit and no path for oil to reach the process. The housing is AISI 304 stainless steel.
Documentation & Drawings
Technical Specifications
| Identification | |
| Code number | 180B1002 |
| Pump size | PAHT 308 |
| Series | PAHT 256 – 308 |
| Type | Axial piston, oil-free, water-lubricated |
| Version | Standard |
| Housing material | AISI 304 stainless steel |
| Other versions of this pump | 180B6091 (PAHT G), 180B6191 (ATEX PAHT G) |
| Displacement & Flow | |
| Geometric displacement | 308 cm³/rev (18.8 in³/rev) |
| Flow at 1000 rpm, max. pressure | 107.8 l/min |
| Flow at 1500 rpm, max. pressure | 354.2 l/min |
| Flow at 1200 rpm, max. pressure | 28.0 gpm |
| Flow at 1800 rpm, max. pressure | 92.1 gpm |
| Pressure | |
| Max. outlet pressure | 120 barg (1740 psig) |
| Min. outlet pressure | 30 barg (435 psig) |
| Inlet pressure, continuous | 2-6 barg (29-87 psig) |
| Max. inlet pressure, peak | 15 barg (218 psig) |
| Speed | |
| Min. speed, continuous | 700 rpm |
| Max. speed | 1250 rpm |
| Operating Conditions | |
| Media temperature | 2-50 °C (37-122 °F) |
| Ambient temperature | 0-50 °C (32-122 °F) |
| Sound pressure level LPA at 1 m | 87 dB(A) |
| Mechanical | |
| Weight (dry) | 105 kg (231 lb) |
| Torque at max. outlet pressure | 661.3 Nm (448.0 lbf-ft) |
| Typical Motor | |
| Motor size at 1500 rpm (50 Hz), max. pressure | 75 kW |
| Motor size at 1800 rpm (60 Hz), max. pressure | 125 HP |
| Identification | |
| Manufacturer | Danfoss High Pressure Pumps |
| Data sheet reference | Danfoss 521B1247, §4.4 |
Video
How an axial piston pump works — the same working principle as the PAHT range
Video courtesy of Danfoss High Pressure Pumps.
Why an Axial Piston Pump
Flow from a positive-displacement axial piston pump is set by displacement and shaft speed rather than by system pressure, so output holds steady as back-pressure rises — unlike a centrifugal pump, whose output falls away as head increases. That matters wherever a nozzle array must keep a consistent droplet size.
- Oil-free — lubricated by the pumped water, so no oil changes and no contamination path into the process.
- No high-pressure mechanical seal — a common wear point on other pump types is simply absent.
- AISI 304 housing, and considerably more compact than an equivalent centrifugal set.
- Field serviceable — Danfoss supplies purpose-designed service kits and tools, which we stock.
Frequently Asked Questions
What flow will the PAHT 308 give me?
Does it come with a motor?
What is the difference between PAH, PAHT, PAHT G and PAHT C?
What inlet pressure does it need?
What filtration does it need?
Is there an ATEX version?
Specifications reproduced from Danfoss data sheet 521B1247, §4.4. PAHT® is a registered trademark of Danfoss A/S. Danfoss reserves the right to alter specifications without notice; confirm critical values against the current data sheet before purchase.
