CSF - Centrifugal hygienic pump (Rolled steel)

The CSF CL-CLC series hygienic pump is a single-stage centrifugal pump in a monobloc design, with parts in contact with the product made from polished AISI 316 stainless steel. Flow rate up to 90 m³/h, head up to 50 m, operating pressure up to 6 bar at temperatures up to 100 °C, maximum product temperature +120 °C. Motor power from 0.37 to 15 kW.

CSF hygienic pump: how do the CL and CLC models differ?

The series is available in two versions, and the difference between them lies in the type of impeller.

The CL has an open impeller with three blades. The open impeller allows products containing solids to pass through and is designed for pumping at low pressure. This version is used for juices, creams, ice cream, cream, milk, wine, spirits and whey.

The CLC has a closed impeller. A closed impeller offers higher efficiency and operates at medium to high pressures within the series, but requires a product free from solid particles. This design is used for feeding pasteurisers, coolers, concentration filters and in washing circuits.

The selection rule is simple: if the product contains inclusions — CL; if head pressure is required and the product is homogeneous — CLC.

CSF Hygienic Pump: Technical Specifications

A complete list of models and performance curves is provided in the series catalogue.

What does a sheet steel structure mean?

The housing in this series features a hybrid construction: stamped parts made from forged, polished sheet metal combined with cast, electropolished components, all made from AISI 316 stainless steel.

A stamped design is lighter and cheaper than a fully cast housing whilst offering the same hydraulic performance. For this reason, the manufacturer positions this series for less demanding applications: those where there is neither high pressure, nor abrasive media, nor aggressive cleaning chemicals used in heavy-duty operation.

The impeller is fitted directly onto the motor shaft — there is no separate bearing assembly or coupling. This reduces the overall dimensions, eliminates the need for alignment during installation and reduces the number of parts requiring maintenance.

Electropolishing of cast components and sheet metal polishing are of direct hygienic importance: a smooth surface does not trap product residues and can be cleaned in the CIP circuit without the need for dismantling.

Connections and sealing options

The pump is supplied with connections complying with various standards: DIN, SMS, IDF, BS/RJT, DS, CLAMP, as well as with EN 1092-1 PN 16 flanges. This allows the pump to be integrated into the existing pipework without adaptors, in accordance with the standard already in use at the production site.

The shaft seal is available in three versions. Single internal — the standard solution for non-crystallising products. Single external seal — where the product must not come into contact with the seal chamber. Double seal with flushing — for products that harden or polymerise on exposure to air, and where a barrier between the product and the environment is required.

The seal seating surfaces are manufactured in accordance with EN 12756 and ISO 3069; therefore, the replacement parts are standardised.

CSF hygienic pump: certificates and materials in contact with the product

The manufacturer states that the series is certified to EHEDG, 3-A and ATEX standards. EHEDG certifies the hygienic design — the absence of dead spaces and the ability to be cleaned in situ. 3-A certifies compliance with sanitary standards for the food, dairy and pharmaceutical industries. ATEX certification applies to designs for potentially explosive atmospheres and complies with Directive 2014/34/EU. The specific set of documentation provided with the delivery is confirmed upon order.

Elastomers in contact with the product comply with FDA requirements and Regulation (EU) No 1935/2004. The gasket material is selected to suit the product and the cleaning regime: NBR, EPDM or FPM/FKM.

Where are the CL and CLC series CSF hygienic pumps used?

The manufacturer classifies this range as being for the food and drink industry.

Typical products include milk and cream, whey, juices, wine and spirits, creams and ice cream. Typical applications in the line include feeding to the pasteuriser, the cooler and the concentration filters, as well as circulation in wash circuits.

The temperature limit of +120 °C means that the pump operates in the hot-wash circuit as well, and not just with cold product. However, the operating pressure is limited to 6 bar at 100 °C, so the wash cycle is monitored by pressure rather than temperature alone.

Selection and service from Steiner Ukraine

When selecting a hygienic pump, the process begins with the product rather than the flow rate: viscosity, the presence of solids, the tendency to crystallise and the cleaning regime determine the type of impeller, the seal design and the material of the gaskets. The operating point is then selected.

We specify the product and its temperature, the design flow rate and head, the line resistance characteristics, the CIP parameters, the standard of available connections and the requirements for documentation on materials in contact with the product. Based on this, we determine the size, impeller type, seal design and motor specifications. Next come supply, service and spare parts. Steiner Ukraine has been operating in the industrial equipment market since 2006.

The self-priming version from the same manufacturer — CSF Self-Priming. Other items — in the section CSF, in the category centrifugal pumps and in the catalogue pumps for the food industry.