Allweiler
SN
| Brand | Allweiler |
| Type | SN |
| Flow | up to 5300 l/min |
| Discharge pressure | < 64 bar |
| Viscosity | 2 tot 5000 mm²/s |
| Medium temperature | max. 150°C |
Product Information
Main Applications
Pumping of heavy and diesel oil, circulation of lubricating and hydraulic oils.
Design
The SN series is a three-screw, self-priming screw pump with hardened and ground spindles that rotate in a replaceable casing insert. The idler screws are hydraulically driven and axial thrust is fully compensated hydrostatically. A groove ball bearing lubricated with the pumped liquid or an external grease lubricated groove ball bearing holds the drive screw in place. The shaft is sealed with either shaft seal rings or mechanical seals. A return pipe connects the seal chamber with the suction chamber. As a result, regardless of the current discharge pressure, only the suction/inlet pressure will affect the shaft seal.