WGL – Process weight doser
Making the process high-performance right from the start.
WEIGHING PRECISION: +/- 0.1%
The use of load cells (OIML approved, 3000 divisions) and the special weighing cycle guarantee outstanding precision (+/- 0.1%).
RUGGED CONSTRUCTION
The high quality of the materials used and the impressive design and construction experience of Paglierani, mechatronics firm and industry leader, guarantee reliability and unbeatable performance.
Extremely tough dosers, built to work NON-STOP, 24 hours a day.
MINIMAL MAINTENANCE
The elimination of moving parts and easy access to internal components deliver minimal, trouble-free maintenance.
Technical data
APPLICATIONS
IN-PROCESS
For controlling quantities of incoming products.
CONSTRUCTION TYPE
TUBULAR
For weight doser models:
WGL 20 - WGL 40
The airtight tubular form makes these dosers ideal for applications requiring compliance with the strictest hygiene standards.
There are no parts where contamination may occur. All control devices (load cells, pneumatic cylinders and limit switches) are on the outside, preventing direct contact with the product and wear of the components themselves.
GENERAL CHARACTERISTICS
QUALITY OF MATERIALS
The standard version is in carbon steel painted with food-approved paints.
A special anti-contamination version has contact parts only in AISI 304 stainless steel.
For aggressive environments and applications, units are in AISI 304 or AISI 316 stainless steel throughout.
THROUGHPUT
WGL 20 and WGL 40 dosers, with constant outgoing flow regulator, are only suitable for use with granular products.
S.W. = kg/dm3
The flow-rate required is set on the weighing control unit, which opens a discharge shutter by the amount required to obtain a constant flow of product, at the set flow-rate, to supply the process machine installed downstream.
The electronic control unit maintains and ensures a constant quantity of product inside the doser to neutralise static pressures and guarantee a precise output flow-rate.
To obtain a constant output flow rate to supply the process machines, the WGL doser is equipped with a self-regulating shutter at the doser discharge point.
WEIGHING ELECTRONIC CONTROL UNIT
Can be installed on-board the unit or remote, in the zone considered most suitable for monitoring of the data processed.
It is completely enclosed in an airtight case and also incorporates the electronic circuit boards.
It is extremely user-friendly and the programming procedure involves “guided steps” (machine/operator dialogue).
The ECU has a weight autolearning programme and is able to save and display the following information:
- Hourly throughput in t/h;
- Instant throughput in t/h;
- Total “A” cumulative in kg, resettable;
- Total “B” cumulative in kg, resettable;
- Daily total in kg;
- Previous day total in kg.
The flow-rate achievable depends on the product (specific weight and particle size) and the weight required.
PNEUMATIC CONTROL EQUIPMENT
The pneumatic system is complete with FRL unit and solenoid valve. It is easily accessible for maintenance.
OPERATING CYCLE
STEP 0
When the Start command is given, the WGL doser opens the intake shutter to allow the set quantity of product to enter the weighing vessel.
STEP 1
Once the product has entered the vessel, the discharge actuator starts to open in accordance with the required flow-rate, and this aperture will remain constant, with small variations, in response to the reduction in weight inside the weighing vessel.
STEP 2
Once the minimum weight threshold set is reached, the discharge shutter position is frozen and the intake shutter is opened again to take in product.
STEP 3
This cycle is repeated continually so that the pressure on the discharge actuator is constant at all times, to avoid affecting the flow of product leaving the doser.
COMMUNICATION OPTIONALS
In addition to the machine’s default communication equipment, the following are available:
- MODBUS TCP/IP
- 232 PROFINET
- 232 ETHERNET IP
DOWNLOAD FOLDER AND TECHNICAL DATA SHEET IN PDF FORMAT
Applications
APPLICATIONS
IN-PROCESS
For controlling quantities of incoming products.
Construction type
CONSTRUCTION TYPE
TUBULAR
For weight doser models:
WGL 20 - WGL 40
The airtight tubular form makes these dosers ideal for applications requiring compliance with the strictest hygiene standards.
There are no parts where contamination may occur. All control devices (load cells, pneumatic cylinders and limit switches) are on the outside, preventing direct contact with the product and wear of the components themselves.
General characteristics
GENERAL CHARACTERISTICS
QUALITY OF MATERIALS
The standard version is in carbon steel painted with food-approved paints.
A special anti-contamination version has contact parts only in AISI 304 stainless steel.
For aggressive environments and applications, units are in AISI 304 or AISI 316 stainless steel throughout.
THROUGHPUT
WGL 20 and WGL 40 dosers, with constant outgoing flow regulator, are only suitable for use with granular products.
S.W. = kg/dm3
The flow-rate required is set on the weighing control unit, which opens a discharge shutter by the amount required to obtain a constant flow of product, at the set flow-rate, to supply the process machine installed downstream.
The electronic control unit maintains and ensures a constant quantity of product inside the doser to neutralise static pressures and guarantee a precise output flow-rate.
To obtain a constant output flow rate to supply the process machines, the WGL doser is equipped with a self-regulating shutter at the doser discharge point.
WEIGHING ELECTRONIC CONTROL UNIT
Can be installed on-board the unit or remote, in the zone considered most suitable for monitoring of the data processed.
It is completely enclosed in an airtight case and also incorporates the electronic circuit boards.
It is extremely user-friendly and the programming procedure involves “guided steps” (machine/operator dialogue).
The ECU has a weight autolearning programme and is able to save and display the following information:
- Hourly throughput in t/h;
- Instant throughput in t/h;
- Total “A” cumulative in kg, resettable;
- Total “B” cumulative in kg, resettable;
- Daily total in kg;
- Previous day total in kg.
The flow-rate achievable depends on the product (specific weight and particle size) and the weight required.
PNEUMATIC CONTROL EQUIPMENT
The pneumatic system is complete with FRL unit and solenoid valve. It is easily accessible for maintenance.
Operating cycle
OPERATING CYCLE
STEP 0
When the Start command is given, the WGL doser opens the intake shutter to allow the set quantity of product to enter the weighing vessel.
STEP 1
Once the product has entered the vessel, the discharge actuator starts to open in accordance with the required flow-rate, and this aperture will remain constant, with small variations, in response to the reduction in weight inside the weighing vessel.
STEP 2
Once the minimum weight threshold set is reached, the discharge shutter position is frozen and the intake shutter is opened again to take in product.
STEP 3
This cycle is repeated continually so that the pressure on the discharge actuator is constant at all times, to avoid affecting the flow of product leaving the doser.
Optional
COMMUNICATION OPTIONALS
In addition to the machine’s default communication equipment, the following are available:
- MODBUS TCP/IP
- 232 PROFINET
- 232 ETHERNET IP
Download pdf
DOWNLOAD FOLDER AND TECHNICAL DATA SHEET IN PDF FORMAT
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