Our fixed dust collectors are all designed by our in-house engineering team to meet specific applications and site conditions. A combination of airflow, air velocity, pressure, resistance and air-to-cloth ratios determines the appropriate size and ducting configuration. Incorrect sizing can result in high emissions, lowered productivity, reduced filter life and a hazardous or unsafe working environment.
Airflow. How much air the system needs to move.
The larger the space where extraction is required, or the greater the number of dust collection pick up points, the greater the airflow required.
Variable Speed Drives (VSD) or Variable Frequency Drives (VFD) can be used to adjust the airflow when there are fluctuating site conditions. This can help to reduce power consumption.
Air Velocity Diagram showing the speed the air needs to move for fixed dust collectors
Air Velocity. The speed the air needs to move.
For dust to travel suspended in air it must travel at or above the minimum conveying velocity for that product. There are also risks such as explosion, toxicity and abrasion associated with certain dust types to be taken into account.
Low air velocity can cause dust build up within ducting and lead to poor dust capture and fires. This can also create an increased explosion hazard. High air velocity can cause premature wear in the duct work by means of abrasion or can break up delicate conveyed products such as food and pharmaceuticals.
Air to cloth ratio diagram shows how to calculate the number of filters required for fixed dust collectors
Air-to-Cloth Ratio. Volumetric flow rate of air through a dust collector’s intake divided by the total cloth area (m²) in the filters.
For dust collectors to capture dust from the air-stream, they must have a sufficient number of filters. Maintaining an adequate air-to-cloth ratio enables the dust collector to operate at peak efficiency.
Dust types and the amount of dust per cubic meter are all determining factors.
Pressure and 3 resistance diagram showing the pressure and resistance across the dust collection system
Pressure and Resistance. Pressure and resistance across the dust collection system.
The fan used in the dust collector must supply enough suction to overcome duct and fixed pressure losses from the collection point(s), through the dust collector and filters before exhausting clean air out of the system.
Resistance to airflow is created by the filters and ducting along with the dust being transported.
JMS F-Series Fixed Dust Collectors
Modular Design. Flexible Solutions
Our fixed unit dust collectors offer a long-term and cost-effective solution to dust and fume control and are designed to handle high-volume dust loads. JMS F-Series dust collectors consist of a centrifugal fan, dirty air intake, high efficiency filters, reverse pulse filter cleaning system, dust discharge system, clean air exhaust and fan silencer.
The JMS F-Series is based on a modular design which provides the flexibility to size the dust control units in relation to the required air volumes. Units range form 6,000m3/hr to 400,000m3/hr. Dust collectors can be combined to provide greater air flow.
Our engineering team can take site and process drawings to determine air flow requirements and design ducting configuration to achieve a total dust control solution.
Dust Discharge System
The hopper collects the heavy dust particulates released from the filters. The dust type will determine the number and shape of the hopper(s).
For standard applications a pyramid hopper is used and discharges via a slide gate to a steel recovery bin or bulker bag.
Configuration options: If collected dust doesn’t ‘flow’, a rotary valve coupled with a pneumatic aerator, that automatically cleans the hopper can be installed for more efficient discharge.
For high volumes a trough hopper can be used with an auger and rotary valve that can also serve to convey materials to a separate discharge location, for example onto a conveyor within a processing plant.
Programmable Logic Computer (PLC)
A simple one-button start-up and shut-down sequence starts and stops all critical components in a programmed order which increases the efficiency of the unit and provides additional safety for workers.
Configuration option: A touch-button or touch-screen HMI Interface can be added if additional functionality is required.
CANbus System
Configuration option: A CANbus system enhances the speed, flexibility, and reliability in communication along with supporting effective troubleshooting and maintenance from off-site. The system retains key alarm logs so that performance and troubleshooting can be undertaken as required.
Instrumentation
Air Flow Meter
The air flow meter monitors the air flow from the exhaust.
Real Time Emissions Monitoring
Real-time particle detectors examine emissions coming out of the clean air exhaust and can be tuned to meet the requirements of any given site. The unit can be programmed to alarm when levels are being approached and exceeded.
Fan and Differential Pressure Gauges
The fan pressure monitor alerts the operator if it is necessary to turn the system volume up due to a long duct run or if there is a blockage in the ducting.
The differential pressure monitor alerts the operator if filters are blocked or if there are higher than normal dust loads.
Safety Features
Grydale JMS F-Series dust collectors offer a number of features that focus on maximising the health and safety of workers along with providing a safe working environment by controlling dust and fumes.
Emergency Stop System
Emergency stop buttons are located on the unit enabling anyone to immediately halt the machine.
Explosion Vents
Configuration option: When dealing with combustible products, explosion vents can be added to the filter house to mitigate these risks.
Operation and Maintenance Lights
Configuration option: Operational and maintenance lights can be fitted in key locations on the unit, giving operators and maintenance workers clear visibility of components and/or to illuminate working spaces.