Miniature Scale R&D Technology

FT25 Modular Scraped Surface Heat Exchanger Systems - issue 5

Armfield miniature-scale technology is well established as offering developers the opportunity to run small trials which provide enough information to allow for scale-up to larger plant with confidence. The formulations go through similar physio-chemical changes as they would in production plant and real time data logging allows results to be recorded and repeated.

The FT25 range of miniature-scale scraped surface heat exchangers has built in control and flexibility with a graphic representation on the membrane technology control panel. The operator can choose the parameters wanted for any particular formulation.

The FT25 has a number of configurations according to the use required.

FEATURES

> Modular system, capable of being fitted with up to three scraped surface heat exchanger barrels
> Full control of barrel speeds up to 1000rpm
> Temperature control system incorporated
> Integral membrane control panel allowing simple control and monitoring of all major variables
> Enclosed self contained, mobile, stainless steel service cabinet for easy cleaning and wash-down
> Hard chromed barrels
> Hygienic design
> Made from AISI 316 stainless steel

Available:

> Variable speed pinworker for margarine and soft spreads
> In cabinet pressurised hot water circulation
> In cabinet refrigeration
> Air incorporation system
> Computer data logging facility

Benefits

> Duplicates full scale process
> Fast, accurate new product development
> All process parameters under operator control for maximum flexibility
> Rugged and reliable units

Description

The FT25 scraped surface heat exchanger series is designed round the Armfield monocoque stainless steel cabinet with membrane technology control panel. The working platform can accommodate one, two or three barrels (B) or a variable speed pinworker (P) alongside a product reservoir and feedpump.

An air incorporation system, pressurised hot water circulation and gear or cavity feed pump options are available as is a refrigeration system supplied within the cabinet and utilising a chilled, recirculating brine which is pumped through the barrel jackets.

Small batch sizes allow rapid product testing and a clean in place (CIP) facility speeds turnround for increased productivity. All services required are housed inside the wash-down cabinet which also contains a pull-out drawer mounted with the electrical chassis. A watertight door at the rear of the cabinet allows access for maintenance and cooling. The electrical chassis is mounted in a pull out drawer also accessible at the rear of the cabinet.

Typical configurations

Continuous Margarine Crystallizer

FT25BP-IF-C: One barrel and one pinworker
FT25BBP-IF-C: Two barrels and one pinworker

A resting tube for product settling and brine refrigeration unit for process cooling are supplied. A range of oil emulsions can be processed.

Continuous Ice Cream Freezer

FT25BA-IF-C: One barrel

Air incorporation via a small air compressor and refrigeration. Overrun can be achieved up to 300% (dependant on product).

 

 

 

 

 

 

Combined Ice Cream and Margarine System

FT25BBPA-IF-C: Two barrels, one pinworker plus air incorporation.

UHT System for Aseptic Products:

FT25BBB-2H-C: Three barrels
Heating by pressurised hot water allows process temperatures up to 150°C to be achieved (one or two barrel systems can also be supplied)

Applications

> Margarine, soft spreads and shortenings

> Confectionery fillings

> Aerated products, ice cream, sorbets

> Aseptic products
- sauces
- condiments
- baby foods
- processed cheese

Unit Specifications

Heat Exchanger Barrel:

Heat transfer area: 0.045m2
Shaft/barrel volume ratio: 1 : 3.5
Scraper blades: 4 along shaft stainless steel,180° separation
Barrel length: 0.35m
Barrel working pressure: 8.0 bar

Pinworker:

No of pins on shaft: 20
No of pins on barrel: 42

Barrel/pinworker drives:

Variable speed ac motors, inverter controlled: speed range 0-1400rpm

Refrigeration system:

Recirculating brine system: -25°C capability

Feed pumps:

Progressive cavity pump

Process throughput: 0-20lph, independent of back pressure
Particulate capability: up to 0.6mm Fibre handling capability: up to 25mm

Air incorporation system:

Air pump with multiple turn control valve and dial to vary overrun

Pressurised hot water system:

Electrically heated: 4kW per system
Operating pressure: 6bar
Water temperature range: up to 160°C
Process temperature up to150°C

Ordering Specifications

Orders for Armfield FT25 units may be placed by using a specification code:
for example FT25BBP-1F-G-A. An explanation of the specification may be found by reference to the table below:

Ordering Specifications

FT25XXX	-YY	-Z	-W
Barrel Configuration	Heating/Cooling Options	Feed Pump Options	Supply Voltage*
BP: one barrel , one pinworker BA: one barrel, air incorporation BBP: two barrels, one pinworker BBB: three barrels BBPA: two barrels, pinworker, air incorporation	-1F: refrigeration system -1H: single hot water circulator -2H two hot water circulators*	-G: gear pump -C: progressive cavity pump (recommended for most applications)	-A 220-240V/1ph/50Hz -C 415V/3ph/50Hz -D 208V/3ph/60Hz -G 220v/1ph/60Hz

* Note:
For units with 2 hot water circulators it is necessary to use a 3 phase supply.
All other configurations use a single phase supply.

Optional Accessories

Data Logging Accessory: FT25XP-90IFD-USB

Windows™ Data Capture Software

A unique benefit of the Armfield miniature scale food processing range is that the measured data may be captured and stored to disk.

An Armfield FT25XP-90IFD-USB data logging accessory transfers results to a computer using Windows. Feed pump flow rate, barrel/pinworker speeds, temperatures and pressures can be monitored in realtime. The data can be displayed in graphical and tabular forms and printed.

A computer with a USB port, and running Windows 98 or later is required.

requirements

Water

Water for refigeration cooling

Cooling water supply with flow rate of 3L/min@3bar and less than or equal to 20°C

Electricity

FT25BA/BP/BBP-A 220-240v 1ph 50Hz
FT25BA/BP/BBP-G 220-240v 1ph 60Hz

FT25BBB-C 415v 3ph 50Hz
FT25BBB-D 208v 3ph 60Hz
FT25BBB-E 380v 3ph 50Hz
FT25BBB-F 220v 3ph 60Hz

Shipping specification

Overall volume: 2.1m³
Gross weight: 380kg

Overall dimensions

Height: 1.40m
Width: 0.85m
Depth: 0.90m

Extended 2 year Warranty on all Armfield Products

DATA SHEET