JQD Series Self-cleaning filter

Product Introduction
JQD Series Self-cleaning filter is a new high-efficiency selfcleaning filter that automatically removes particulate impurities from the inner surface of the filter element via mechanical scraping, enabling continuous online filtration. Designed primarily for high-viscosity filtration, it handles viscosities up to 800,000 mPa·s and offers a filtration accuracy range of 50–1500 μm. It provides precise filtration, rapidly scraping impurities off the element surface for highly efficient contaminant removal, making it suitable for water and various viscous liquids. Manufactured to high-performance, high-quality, and high-reliability standards, it meets international top-class quality levels.
Traditional filters frequently clog when processing viscous materials and soft impurities, forcing users to adopt oversized filters or perform laborintensive manual cleaning. This results in high investment, heavy workloads, and significant material waste. The pneumatic scraper-type selfcleaning filter easily solves these problems with advanced self-cleaning operation. It maintains consistent filter element cleanliness, discharges highconcentration impurity wastewater, and reduces material loss. It excels at filtering poor-quality water and viscous substances such as adhesives, resins, polymers, and oils, delivering superior efficiency. With notable technical advantages and low operating costs, it is gradually replacing traditional manual filters in many fields, including vibrating screens, bag filters, basket filters, and certain backwash-type filters.
Working Principle
Filtration Mode
Liquid enters through the inlet. A spring-loaded disc scraper is pressed tightly against the inner surface of the filter element and rests at the top. Liquid passes through the scraper, flows outward from the filter’s inner surface, and impurities are trapped on the inner surface, while clean liquid exits through the outlet. As impurities accumulate over time, the differential pressure rises, triggering cleaning either by preset pressure difference or timer.
Cleaning Mode
A pneumatic cylinder drives the scraper to move up and down reciprocally to clean the filter element.
On the downstroke: Impurities are pushed to the bottom of the filter; heavy particles settle into the dirt collection chamber.
On the upstroke: Residual impurities are scraped off and pushed to the top of the filter element, then flushed away by the flowing liquid. They pass through the scraper back to the inner surface and are removed on the next downstroke.
Each cleaning cycle consists of several strokes. Once cleaned, the filter regains full filtration capacity. Filtration continues normally during cleaning with no flow interruption.
Discharge Mode
After multiple cleaning cycles, when impurities reach a set level, the drain valve opens automatically to discharge wastewater with high impurity concentration. The discharged liquid can be recovered if required.  Product Introduction