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Armfield FT 40

General Overview

Pasteurising, cooling, hardening, emulsifying, reconstituting, incubating, and mixing are all processes relevant in food processing laboratories. The Armfield multi-purpose processing vessel is capable of performing all these functions as a standalone, mobile unit. Its mobility allows for positioning next to other laboratory equipment, making it flexible for a range of applications and easy to store. The hygienically designed, jacketed vessel offers a working volume of 10 to 15 litres, enabling experiments and demonstrations without requiring large quantities of raw materials. An electric heating element at the base of the jacket heats water within the jacket, which in turn gently transfers heat to the vessel’s contents. This method provides a gentle heat transfer, which is crucial for heat-sensitive ingredients, and avoids local "hot spots" through convective heat distribution. Cooling is achieved simply by dosing water from the mains water supply through the jacket. For chilling, cooled water is circulated in a closed loop by an ice bank circulator integrated into the machine base.

A variable-speed emulsifier with various emulsifier head options can be lowered into the process liquid. Students can gain practical experience and the comprehensive instrumentation enables full process logging. An automatic valve switching system simplifies operation, allowing students or trainees to select the required process simply, rather than operating a series of manual valves.
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Description

Refer to the diagrams in Section 8 "Equipment Diagrams" as needed.

9.1 Overview

The double-walled stainless steel vessel (1) features a polished, hygienic surface and a working capacity between 10 and 15 litres. The contents are heated indirectly by a heating cartridge (16) situated in the base of the jacket. The heater is protected against overheating by an adjacent thermostat (17). An emulsifier (2) can be inserted into the vessel using the locking handle (5). The on/off and speed control (14) of this device are located on the motor housing rather than on the main control console. A green running indicator light (7) displays when the emulsifier motor is activated. The emulsifier head (3) can be easily exchanged for any of the supplied alternatives by simply removing the knurled nuts securing the head to the drive shaft. A lid (6) prevents airborne contamination during extended heat treatment operations.

Chilled water is circulated from an ice bank (12) beneath the processing vessel. After a period required to build up the ice bank, this chilled water is supplied to the vessel jacket, cooling the contents to a temperature suitable for storage or hardening. The ice bank is typically replenished following an initial rapid cool-down by circulating chilled water from the mains supply. 3-way valves (10) and (11) enable automatic selection between open-loop or closed-loop chilling circuits. In both cases, the water passes through a flow meter (13), where the flow can be manually adjusted via control valve (14). From the flow meter, water is directed into the bottom of the vessel jacket, after passing an in-line non-return valve (15)...

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