SN & SM Series
Decades of Reliability, Efficiency, and Versatility
ALLWEILER’s SN and SM series three-screw pumps offer decades of optimized reliability, efficiency and adaptability. The self-priming pump features hardened and polished spindles which are running in a replaceable liner. It offers a wide range of variants and applications thanks to a flexible modular system.
Hydraulic drive of the drive screws and full hydrostatic compensation of the axial thrust ensures reliable performance. The drive screw is supported either by a fluid-lubricated or by an external grease-lubricated bearing. Whether in the industrial, power, oil and gas, or maritime sectors, SN/SM series three-screw pumps are the ideal choice for demanding applications.
Key Advantages
Modular System
Customized pumps for your application
Long Service Life
Hardened spindles and a variety of coating options
Easy Maintenance & Customization
With interchangeable liner
Versatile Solution
Tailored Pumping Excellence
Allweiler’s ALLIFT® pump series offers precise flow rate graduation throughout the entire performance range, achieved through various pump sizes and spindle pitch angles, resulting in flow rates ranging from 30 to 820 liters per minute (l/min). This extensive range of flow rates enables you to choose the most suitable performance to satisfy your unique elevator and hydraulic needs.
Whether operating elevators, lifting platforms, theater stages, or other hydraulic machinery, ALLIFT® pumps bring you to the top.
Seal the Deal
Customizable Solutions for Mechanical Seals
The choice between a wide range of mechanical sealings as well as magnetic couplings allows to tailor the sealing solution to meet your specific needs. The return line connects the seal chamber to the suction chamber, so that the shaft seal is only affected by the suction/intake pressure. This intelligent design ensures reliable sealing regardless of discharge pressure, which increases service life and minimizes maintenance.
The Art of Technological Adaptation
The Liner of the SN&SM Series Pumps.
A key feature of this series is the interchangeable liner. Thanks to this intelligent design, we can adapt the materials and coatings of the liner to the specific operating conditions and thus achieve optimum solutions for specific applications. This is critical when handling abrasive media that require special materials to ensure long-term performance and durability. The replaceable liner also allows for easy maintenance of the pump.
Technical Details
ALLFUEL® Series
| Series | Specifications | Max. Capacity [l/min] |
Max. Inlet Pressure [bar] |
Max. Outlet Pressure [bar] |
Max. Fluid Temperature [°C] |
Viscosity Range [mm²/s] |
|---|---|---|---|---|---|---|
| SN | Flexibly available in all variants | 5,300 | 10 | 100 | 250 | 3-5,000 |
| SM | Flexibly available in all variants | 2,200 | 10 | 120 | 250 | 1-5,000 |
Let’s talk
Application Consulting For Your Needs
Finding the right pump takes expertise and careful consideration. Our team of experts is here to help you find and implement a customised solution for your application.
Our Service won’t stop after purchase
At CIRCOR we are committed to providing our customers with an excellent service experience based on safety, reliability and quality without compromise. Our team supports you with comprehensive advice, 24/7 support through our worldwide service network, on-board and factory maintenance and genuine spare parts on request. Our factory acceptance testing ensures the high quality of our products.