The Donaldson Torit RF Baghouse Dust Collector is a continuous-duty dust collection system designed to handle high-volume, high dust-load applications, with capacities up to 141,000 cfm, depending on the specific application and dust type. Its continuous-duty design allows for on-line pulse cleaning of the bag-style filters without interrupting airflow through the collector. A solid-state timer ensures that the bag-style filters are cleaned at least once every four minutes.
Function Description:
The collector operates by drawing dust-laden air into the dirty-air inlet. For models with an involute scroll-style inlet (RFWP), a cyclonic airflow is generated, causing heavier particulate matter to drop directly into the hopper. The air then passes through an internal flow straightener, which evenly distributes the dust-laden air across the collector's cross-section and around the filter bags. Lighter dust collects on the outside surface of each filter bag, forming a dust cake. Clean, filtered air then passes through the filter bags into the clean-air plenum and exits through the clean-air outlet.
For models with a high body inlet (RFWPH), designed for lighter density dusts or highly abrasive materials in continuous 24/7 operations, the air enters the dirty air plenum and passes through a set of self-sacrificing air distribution baffles. These baffles reduce the inertia of abrasive materials, causing much of the dust to fall into the hopper. The 3/16-inch plate heavy-duty baffles offer long-term abrasion resistance and can be easily replaced through an access door on the inlet housing.
The cleaning system utilizes a positive-displacement (PD) blower to supply pressurized air. When the solid-state timer energizes a solenoid valve, a diaphragm valve opens, directing a high volume of pressurized air through manifold arms and into the filter bags. This dislodges the dust cake, which then falls into the hopper for discharge into a drum, bin, rotary valve, screw conveyor, or pneumatic conveying system.
Important Technical Specifications:
- Capacity: Up to 141,000 cfm (application and dust type dependent).
- Filter Type: Bag-style filters (felt or pleated options available).
- Filter Bag Lengths: Available in 10-ft or 12-ft lengths.
- Housing Design: Cylindrical, sectional bolt-together construction.
- Filter Bag Quantity: Standard sizes from 570 to 905 filter bags.
- Inlet Options: Involute scroll-type inlet with internal deflection baffle (RFWP) or high body inlet with air distribution baffles (RFWPH).
- Baffle Material (RFWPH): 3/16-inch plate heavy-duty baffles.
- Cleaning System: Pulse-jet cleaning with solid-state timer, solenoid valves, and diaphragm valves.
- Cleaning Air Pressure: Typically 8-9 psig between pulses.
- Pulse ON Time: Factory set at 100-milliseconds (1/10-second).
- Pulse OFF Time: Factory set at 10-seconds (field adjustable).
- Solenoid Valves: 120V/60 Hz intermittent duty @ 20.9 watts.
- PD Blower Pipe Sizing (570-905 models): 2-inch diameter.
- Operating Temperature Range: -20°F to 130°F.
- Electrical Requirements: 102-132V/50-60Hz/1Ph for timer, specific voltage and amperage for motors as per rating plate.
- Optional Equipment: Magnehelic® Gauge, Photohelic® Gauge, Explosion Vents (Foam-in-Shear or IEP KER Vent).
Usage Features:
- Continuous Duty: Filters can be cleaned on-line without interrupting airflow.
- Walk-in Clean-Air Plenum: Allows for filter bag service from inside the clean air plenum.
- Involute Inlet (RFWP): Designed to remove heavy materials before reaching the bags, potentially eliminating the need for a separate cyclone precleaner.
- High Body Inlet (RFWPH): Ideal for lighter density materials and offers better abrasion resistance.
- Modular Construction: Sectional bolt-together design for easier assembly.
- Versatile Applications: Common in woodworking and grain industries, also suitable for cement, chemical, coal, and food processing (sugar, moisture-sensitive materials).
- High Pressure/Vacuum Capability: Designed to handle applications with high pressure or vacuum requirements.
- Single Discharge Hopper: Simplifies material handling.
- On-Demand Cleaning: Can be wired for on-demand cleaning with an external pressure switch.
- Explosion Vent Options: Available for applications with combustible dust hazards, designed for outdoor installations.
Maintenance Features:
- Easy Filter Access: Walk-in clean-air plenum facilitates filter bag service.
- Replaceable Baffles (RFWPH): Individual air distribution baffles can be easily replaced through an access door.
- Filter Removal/Installation: Detailed procedures for felt bag and cage with Boltsafe™ hardware, pleated bag with Boltsafe™ hardware, and felt snap-in bag filters.
- Cleaning Arm Rotation: The cleaning arm may need to be manually rotated to access all bags during filter removal.
- Pressure Drop Monitoring: Magnehelic® and Photohelic® gauges provide visual display of filter condition and change requirements.
- Regular Inspections: Recommended weekly and quarterly checks for pressure drop, air reservoir pressure, lubricant levels, clean-air plenum condition, baffle wear, door seals, drive chain/belt tension, and explosion vents.
- Troubleshooting Guide: Comprehensive guide for common issues such as fan/motor problems, dust discharge, insufficient airflow, and cleaning system malfunctions.
- Interlocking Devices: Recommended for motors to ensure proper system operation and prevent dust accumulation in the collector.
- Sequenced Start-up/Shut-down: Recommended sequences to minimize material build-up and extend filter life.
- Lubrication: Specific lubricant recommendations for positive-displacement blower and gear reducer based on temperature.
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