• Suitable for chemical and pharmaceutical synthesis products;
• It’s used for products that need a wide filtering surface and very frequent change of production, due to its simple operation and cleaning procedures;
• The contact of the operator with the product and of the product with external environment cannot be avoided unless simple containment solutions;
• For the small sizes, a “glove box” installation can be provided;
• It can be controlled via a PLC or DCS;
• C.I.P. (Clean In Place) possibility at every change of production to avoid “cross contamination”;
• Good finish of the process area;
• Small foot print;
• Installation on 3 columns or on inertia base with visco dampers
• Fully inspectable process area for the GMP needs (fully openable casing)
• “Automatic” filter bag extraction;
• Optional cake detector for cake thickness monitoring
• Available MOC: AISI 316L, AISI 904L, Hastelloy, Monel, ALLOY 59, 254 SMO, NICKEL, TITANIUM, SAF 2205. HALAR coatings (ECTFE), also antistatic and FDA certificated, Teflon ETFE, HARD RUBBER

Version

• ALFA/B - The simplest execution with manual cake removal by means of shovel. This model is used mainly for small sizes (filter bag and filter cloth may be used).
• ALFA/SB - The solids discharge is achieved by means of the bag lifting up (the most common system). A special system can be used for the “automatic” bag lifting.
• ALFA/SB CA - The solids is discharged by a knife and evacuated via a pneumatic system (vacuum). The system, usable only with easy products to be pneumatically transported and mainly dedicated productions, avoids the contact of the operator with the product and of the product with the external environment.

Production

Loading

The solid-liquid suspension is fed from the loading pipe into the centrifuge and under the action of centrifugal force it moves towards the filter cloth, placed on a perforated drum. The solid part of the suspension is retained by the filter cloth forming a cake, while the liquid filters through the cake and the cloth and is discharged through the holes of the basket. The growth of the cake thickness is controlled by a mechanical or laser detector, which can automatically stop the loading phase when the desired cake thickness is reached.

Cake washing

The washing of the product is used to remove any impurities present in the cake. The washing liquid is distributed on the product, along the entire length of the basket, through nozzles suitably distributed on the washing pipe. The liquid passes through the product, then passes from the filter bag and the holes of the basket, removing impurity present in the cake.

Centrifugation

Once completed the washing phase, the centrifuge is accelerated to the maximum allowable speed and maintained for a given time to achieve the level of residual humidity of the product in processing. At the end of the centrifugation, the centrifuge is stopped to discharge the product.

Discharge

The solids discharge can be achieved manually by means of: shovel (Alfa/B), lifting bag system (Alfa/SB) or automatically via knife/vacuum (Alfa/B-CA).

Centrifuge cleaning (CIP)

The centrifuge should be cleaned at every change of product to avoid "cross-contamination" between the processed products. The centrifuge cleaning system, fully automated, is composed by 2 main stages: Washing Machine Effect and cleaning with spray balls, which can be alternated to achieve maximum cleaning and to optimize the consumption of the cleaning liquid.