China G4 Coarse Efficiency Winding Filtration Equipment - High-Quality Suppliers and Factory Solutions
Filter Media: Usually made of synthetic non-woven fabric, fiberglass, or activated carbon composite media, formed into a roll. The media has uniform grid lines for strength support and sensing control.
Upper / Lower Roller Shafts: The roll of clean filter media is installed on the upper shaft. The used, dirty media is collected on the lower shaft.
Filter Section: The media is drawn from the upper shaft, passes vertically or horizontally through the equipment frame to form an effective filtering surface, and is then wound onto the lower shaft.
Motor: Provides power to drive the rotation of the lower shaft, winding the media.
Control System: The "brain" of the unit, typically triggering media replacement based on one or more of the following signals:
⚡ Differential Pressure Control (Most Common): Pressure sensors installed on both sides of the media. When dust accumulation increases resistance to a preset value (e.g., 100–150 Pa), the system automatically starts the motor to advance new media.
⏱ Timer Control: Media is replaced periodically at fixed intervals (e.g., once a week) based on operational experience.
🖐 Manual Control: A manual button on the control panel forces media replacement on demand.
Made of metal (such as galvanized steel sheet, aluminum alloy) to support all internal components and provide interfaces for duct connections. Requires sturdy structure and good sealing.
🔍 Inspection Window: Allows visual inspection of the media's dirt level and remaining quantity.
🔔 Alarm Device: Emits audible and visual alarms when the media is nearly exhausted or the equipment malfunctions.
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Initial State: New, clean filter media is drawn from the upper shaft, covering the entire filter face, with its end fixed to the lower shaft.
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Normal Filtration: Dust-laden air passes through the media; dust is captured on the surface, and clean air enters downstream. As filtration proceeds, dust accumulates, gradually increasing airflow resistance and raising the pressure differential.
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Automatic Start: When the differential pressure reaches the preset "start value," the pressure sensor sends a signal to the controller.
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Rolling Update: The controller starts the motor, driving the lower shaft to rotate — winding up the dirty media while simultaneously pulling a corresponding length of clean media from the upper shaft. This typically lasts from a few seconds to several tens of seconds.
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Automatic Stop: After the media is updated, the controller stops the motor either when the differential pressure drops to the "initial value" or after the motor has run for a preset fixed duration.
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Cycle and Alarm: This process repeats cyclically until the media on the upper shaft is fully used up. The control system then triggers a "media exhausted" alarm, prompting maintenance personnel to replace the media roll.
