From application to pump selection
Rotary Lobe Pump Selection Guide
Prepare the fluid and operating data needed for a pump recommendation. Start with what you know; use the worksheet to request a review or print a copy for your project team.
How to Select a Rotary Lobe Pump
Work through these four checks, then share your duty data for a pump recommendation.
Fluid & Solids
Identify the medium, viscosity, temperature, and any solids or grit.
Flow & Pressure
Define the required flow and discharge pressure, including startup conditions.
Inlet Conditions
Describe the tank level, suction lift, and inlet pipe layout.
Materials & Drive
Review wetted materials, cleaning conditions, power supply, and operating cycle.
Platform Operating Range Reference limits across the pump range
Platform Capabilities at a Glance
Indicative maxima across the range, not simultaneous ratings for one pump. Confirm the selected model against fluid, inlet conditions, speed, pressure, and drive requirements.
Duty Data Worksheet
Duty Data Worksheet
Start with the fluid, flow, and pressure you know. Expand the additional details when available; unknown values can stay blank. Your entries are sent only when you submit a sizing request.
Start Here: Fluid, Flow & Pressure
Additional Duty Details Optional — add what you know
Fluid Properties
Viscosity & Temperature
Suction Condition
Solids
Operating Pattern
Material Pre-Check
Check the Wet-End Materials
Use the fluid details to identify what needs checking, not to approve a compound from a broad application name. Include the rotor, casing, wear parts, seal faces, and O-rings.
| Duty Clue | Selection Focus | Details to Provide |
|---|---|---|
| Abrasive sludge or gritty slurry | Rotor covering and replaceable wear surfaces | Solids concentration, particle size, hardness, and temperature. |
| Oil, fuel, fat, or hydrocarbon | Swelling resistance of rotor covering and seal elastomers | Exact fluid composition, additives, temperature, and any cleaning chemicals. |
| Acids, alkalis, or cleaning chemicals | Chemical resistance across every wetted component | Chemical identity, concentration, temperature, and exposure duration. |
| Food, dairy, or clean-process duty | Wet-end finish, material records, and cleaning requirements | Process fluid, CIP / SIP conditions, connections, and required documentation. |
Abrasive sludge or gritty slurry
- Selection Focus
- Rotor covering and replaceable wear surfaces
- Details to Provide
- Solids concentration, particle size, hardness, and temperature.
Oil, fuel, fat, or hydrocarbon
- Selection Focus
- Swelling resistance of rotor covering and seal elastomers
- Details to Provide
- Exact fluid composition, additives, temperature, and any cleaning chemicals.
Acids, alkalis, or cleaning chemicals
- Selection Focus
- Chemical resistance across every wetted component
- Details to Provide
- Chemical identity, concentration, temperature, and exposure duration.
Food, dairy, or clean-process duty
- Selection Focus
- Wet-end finish, material records, and cleaning requirements
- Details to Provide
- Process fluid, CIP / SIP conditions, connections, and required documentation.
Material families are not blanket compatibility approvals. Confirm the specific compound and complete wet end against the process and cleaning conditions.
Open Materials Guide → Engineering Review
Request a Pump Recommendation
Ready for a model review? Submit the worksheet with your contact details. Still comparing pump types? The guides below can help you decide.
Your worksheet entries are included. No need to enter them again.