China G4 Coarse Efficiency Winding Filtration Equipment - Top Suppliers and Factory Solutions

• Painting / Spraying Workshops: Serves as primary filtration for paint booths and curing ovens, protecting downstream high-efficiency filters from rapid clogging.
• Automobile Manufacturing & Machining: Filters dust from outdoor air in large factory central air conditioning systems, ensuring workshop cleanliness and product quality.
• Electronics & Semiconductor Plants: Acts as a pre-filter in clean room AHUs, extending the service life of medium and high-efficiency filters.
• Food & Pharmaceutical Factories: Provides reliable coarse filtration to meet hygiene and air quality standards in sensitive production environments.

CoreFilter Unit

• 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.

ControlDrive and Control Unit

• Motor: Provides power to drive the rotation of the lower shaft, winding the media.
• Differential Pressure Control (Most Common): Pressure sensors on both sides of the media detect resistance. When differential pressure reaches a preset value (e.g., 100–150 Pa), the system automatically advances new media.
• Timer Control: Media is replaced periodically at fixed intervals (e.g., once a week) based on experience.
• Manual Control: A manual button on the control panel forces media replacement.

FrameCasing and Frame

• Made of metal (galvanized steel sheet, aluminum alloy) to support all internal components and provide duct connection interfaces. Requires sturdy structure and good sealing.

ExtrasOther Accessories

• 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.

1. 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.
2. Normal Filtration: Dust-laden air passes through the media; dust is captured on the surface, and clean air enters downstream equipment. As filtration proceeds, dust accumulates and airflow resistance gradually increases.
3. Automatic Start: When the differential pressure reaches the preset "start value," the pressure sensor sends a signal to the controller.
4. Rolling Update: The controller starts the motor, driving the lower shaft to rotate — winding up dirty media while simultaneously pulling a corresponding length of clean media from the upper shaft. This typically lasts a few seconds to tens of seconds.
5. Automatic Stop: After media update, the controller stops the motor either when differential pressure drops to the "initial value" or after a preset fixed duration.
6. Cycle and Alarm: This process repeats cyclically until the upper shaft media is fully used. The control system then triggers a "media exhausted" alarm, prompting maintenance personnel to replace the media roll.