Soap & Detergent Rotary Lobe Pumps

Define the Product and Transfer Cycle

Identify the formulation and whether the duty is tank transfer, batch filling, or process feed. Supply starting and running conditions separately, including idle periods and the cleaning cycle.

Soap and detergent

Formulation-specific behavior. Describe viscosity, foam sensitivity, and any thickening, solidification, or crystallization observed during cooling.

Processed food

Product and hygiene requirements. Specify the food, quality limits, particles, cleaning method, and required product-contact documentation.

Temperature, Inlet Feeding & Cold Starts

Provide viscosity with temperature, units, and measurement conditions, including the lowest expected starting temperature. Where the product thickens or solidifies on cooling, review inlet feeding, drive requirements, and a defined warm-up sequence before restart.

If heating is needed, confirm jacket availability and permitted heating medium, pressure, and temperature for the selected model. Include upstream pipework and valves in the temperature plan; warming the pump alone may leave the inlet restricted.

Foam, Entrained Air & Product Texture

For foam-sensitive detergents, describe air already present in the feed and how the source tank, suction line, and filling outlet are arranged. Review air entry and inlet restrictions alongside speed; reducing speed alone does not establish foam control.

For products with texture or dispersion limits, define acceptance checks and report any soft pieces, hard particles, or agglomerates. Review passage geometry and representative product trials where needed before assuming texture or particle integrity will be retained.

Seal Compatibility, Deposits & Shutdown Cleaning

Review wetted metals, rotor coverings, seal faces, and elastomers against the complete formulation and cleaning chemicals at their actual temperatures and concentrations. Include any abrasive particles or deposits reaching the seal.

If the product dries, crystallizes, or hardens during idle, agree on draining, flushing, and restart procedures for the proposed seal arrangement. Confirm any support fluid, monitoring, and leakage handling against the selected equipment’s instructions.

Processed Foods: Confirm the Hygienic Configuration

Provide the food-contact requirements and documents needed for the actual product, temperature range, and cleaning process. Review the proposed pump’s wetted materials, connections, seal arrangement, drainability, and inspection access; a stainless-steel body alone does not establish hygienic suitability.

Where cleaning in place is required, agree on the cleaning procedure and how it will be validated for the installed system. Confirm which material declarations, surface-finish records, or other specified documents are included in the offer.