Description

The FT75 Laboratory Pasteuriser accurately reproduces in miniature the industrial high temperature, short time process (HTST). Nominal throughput is only 10 litres/hour. Although primarily designed for use with milk, other food liquids can be pasteurised providing that their solids content is not too high.

Pasteurising temperatures and holding times are easily adjusted, enabling the effectiveness of the product treatment to be investigated. When correctly operated, cleaned and sterilised the FT75 can produce a correctly treated and pasteurised product. However it is not intended that this apparatus be used to manufacture products for human consumption.

The HTST process involves heating the process liquid (milk) to a minimum temperature of 72°C, holding this temperature for15seconds and cooling to a storage temperature as quickly as possible.

Thethree-stageplateheatexchangeroftheFT75(fig.1)achievesthese parameters by(1)heating the process liquid with hot water prior to its entry into the holding tube and then by(3)cooling with cold water to storagetemperature.Anintermediateheatexchanger(2)transfersheat fromthetreatedproducttothefeedliquid.Thisprovidesdualbenefits in reducing the energy required to reach the pasteurising temperature and in reducing the cooling required. An optional ArmfieldCW17Chilled Water Circulator is available. Full instrumentation and controls are provided to regulate heating water temperature and also feed pump speed, which in turn regulates holdingtime.

Optional computer linkage is available to control the process and to log production data.

A user instruction manual provides installation, commissioning and maintenance data together with project exercises. For secondary/high school use, a full set of worksheets and simple explanations is available on request.

Overall dimensions
Length	1.00m
Width	0.50m
Height	0.55m
Packed and crated shipping specifications
Volume	0.50m3
Gross weight	30Kg

Ordering Specification

A benchtop miniature high temperature, short time (HTST) system for the demonstration of the industrial pasteurisation process

Includes a transparent feed tank, a feed pump, a three-stage heat exchanger,aholdingtube,adivertsystemandahotwatercirculator

The feed pump is a peristaltic pump with a variable-speed control

The heat exchanger is fully representative of large-scale industrial units

It uses stainless steel heat transfer plates

It can be dismantled for examination and cleaning

It comprises three stages, a final heating stage, a regeneration stage and a cooling stage

Holding time is 15s at 10 l/hr, in a stainless steel holding tube

Process temperature is measured and controlled

Hotwateriscirculatedaroundtheheatingstageoftheheatexchanger in a closed-loopsystem

A PID controller is used to adjust the electric water heater, keeping the product process temperature at the requested value

Optional data logger with USB interface is available