Tetra Alfast® Plus
Direct In-line standardisation
Tetra Alfast Plus is designed for automatic in-line standar-
disation of the fat, SNF and protein content in milk and
cream direct after milk separation for dairy products
including; low and high fat market milk, market cream,
flavoured milk, cream for butter making, milk for fermented
products and powder production, cheese milk, whey, ice-
cream mix, formulated products and functional foods.
Tetra Alfast Plus is fully automated to ensure uniform
product quality while in production
Working principle
By continuously controlling the back pressure of
the separator cream outlet in a Cascade Control
System, an accurate fat content is achieved, All models have a surplus cream line that is used
regardless of variations in the raw milk fat for regulating the flow rate of remix cream into the
content. skim milk line, thereby standardising the milk
The raw milk is separated in the separator where
the skim milk pressure is kept constant by a
constant pressure-modulating valve. A flow
transmitter measures the cream flow from the Options
separator and the fat content is calculated from a
temperature compensating density transmitter. SpotOn
Another flow transmitter measures the flow of SpotOn is a software package including the
standardised milk. following functionalities:
• Direct in-line compensation
On receiving signals from the transmitters, the • Control of product change
computer in the control panel calculates the fat • Control of separtor discharge
content, in relation to set points and flow rates, • Control of filling pasteuriser
and then transmits control signals to the cream • Control of circulation of pasteuriser
flow modulating valve, thereby controlling the fat • Quick-batch an automatic in-line
content, whenever required. batch standardisation system
Flowchart for Tetra Alfast Plus - Standardisation of fat content in cream and
milk
Note: Separator not included in Tetra Alfast Plus delivery
Extended applications Production safety
. Tank standardisation from two silo tanks . Mix-proof valves.
without any in-line separator. . UPS, Uninterrupted Power Supply for the
. Automatic calibration for SNF variations. control system.
. Software for ratio control between Fat/ . Air cooler with compressor for control panel if
Protein or Fat/SNF. temperature in surrounding process area
. Skim milk removal. exceeds 28°C.
. Partial by-pass of separator.
. Cold milk standardisation with a temprature Control panel
between 6-12°C. . Industrial PC for operator interface, installed
. Protein sensor, the sensor takes samples in in the control cabinet door.
the standardised milk pipe to analyse the . Communication with supervisory system.
actual protein content.
Additives
. Additive to milk for adding another constitu-
ent to the milk.
. Additive to cream for adding another con-
stituent to the cream.
. Vitamin dosing.
Flowchart for Tetra Alfast Plus - Production of fat and protein standardised
milk
Note: Separator not inclued in Tetra Alfast Plus delivery
Processing parameters . Main switch, emergency stop, solenoid
valves and wiring.
Raw milk flow rate, l/h . The unit is prepared for remote operation
5 000 - 75 000 which enables integration with a master
control system such as Tetra PlantMaster.
Standardised milk fat content, % F . The control panel is in stainless steel and has
≥ 0,2 its own frame and can be placed on any side
of the process unit or at remote location.
Hot milk, standardisation temperature, °C
45 - 65 Human-Machine-Interface
. Office PC for installation in control room.
Basic Unit
Main components Technical data
. Density transmitter with four wired PT-100.
. Flow transmitters. Consumption data
. Control valves, Change-over-valve, Non- Power consumption*, kW 0,5
Instrumental air, 600 kPa, 200
return valve, sampling valves. Nl/min
. Pressure gauge. * Voltage 200-400 VAC, 1-phase (max variation ±5%), frequency 50/60 Hz
. All internal wiring and piping.
. All components pre-assembled on a stain- Shipping data
less steel frame except the flow transmitter Approximate figures
for standardised milk. It is delivered sepa- Net weight, kg 200
Gross weight, kg 430
rately and should be placed at a distance of Volume, m³ 3,3
>3 meters away from the mixing point.
. Technical documentation. Environment
. Tetra Alfast Plus is built in a modular design,
Control panel which makes them easy to rebuild and adopt
. ABB SattLine control system. to new duties.
. Digital paperless recorder. . Tetra Alfast Plus consist of parts that can be
separated for recyling purposes.
Dimensions
Approximate dimensions of basic unit in mm
© 2006 Tetra Pak Dairy & Beverage Systems AB PD63522EN3 2006-02
www.tetrapak.com We reserve the right to introduce design modifications without
prior notice, Tetra Pak, , protects what's goodand
Tetra Alfast are trademarks belonging to the Tetra Pak Group.
