The Pneumatic Cylinder Scraper Filter is an automatic self-cleaning filtration system designed for continuous removal of solid particles and impurities from high-viscosity liquids. Driven by a pneumatic cylinder, the scraper mechanism efficiently removes accumulated contaminants from the filter element surface without interrupting the filtration process.
UNITE FILTER pneumatic cylinder scraper filters are suitable for challenging applications involving viscous fluids such as polymers, resins, coatings, adhesives, oils, and chemical liquids. The robust scraper design ensures reliable cleaning performance, reduces filter blockage, and extends the service life of filter elements.
With high filtration accuracy, low maintenance requirements, and reliable automatic operation, the Pneumatic Cylinder Scraper Filter provides an efficient solution for industrial filtration processes requiring continuous operation and stable performance.
During filtration, the process liquid enters the filter housing and passes through the filter element from the outside to the inside. Solid particles and impurities are captured on the outer surface of the filter element, gradually forming a filter cake layer.
When the pressure differential reaches the preset value, the pneumatic cylinder drives the scraper mechanism to move along the filter element surface. The scraper removes the accumulated contaminants and restores the filtration area. The cleaned impurities are discharged through the drain outlet, while filtration continues with minimal interruption.
The Unite twin-cylinder self-cleaning filter system is shown in thediagram. The incoming fluid
(1) is filtered from the inside out throughthe filter screen
(2) and exits through the outlet
(3). The cleaning disc
(4)moves up and down inside the filter screen, repeatedly cleaning thescreen. Impurities are discharged from the bottom.
Talk to Our Engineers to Get a Free, Customized Filtration Solution.
A Pneumatic Cylinder Scraper Filter is an automatic self-cleaning filtration system that uses a pneumatic cylinder to drive a scraper mechanism, removing accumulated solids from the filter surface without stopping the process.
During filtration, solids are retained on the filter element. When cleaning is triggered by pressure difference or timer, a pneumatic cylinder activates the scraper, which moves along the filter surface to remove debris. The waste is then discharged through a drain outlet.
Key advantages include stable automatic cleaning, precise control via compressed air, suitability for continuous operation, reduced manual maintenance, and strong performance in handling sticky or high-solid-content fluids.
These systems are widely used in chemical processing, petrochemicals, coatings and resins, oil refining, food and beverage, and wastewater treatment industries where continuous filtration and reliable cleaning are required.
Pneumatic scraper filters use compressed air-driven cylinders for precise and responsive cleaning control, while mechanical scraper filters rely on motors or gear systems. Pneumatic systems are often faster and more adaptable for automated processes.
Empowering China Minmetals' battery-grade production, this fullyautomatic separation solution achieves nano-level filtration and automateddischarge for high-efficiency expansion.
For a large chemical plant in the Dalian Development Zone, UNITE supplied a modular automatic self-cleaning filtration unit for high-flow circulating cooling-water purification and reuse. The system combines stainless-steel wedge-wire screens, motor-driven suction or brush cleaning, automatic blowdown, differential-pressure and timer triggers, PLC control, touchscreen monitoring, remote communication, and corrosion-resistant construction. The reported result was an extension of heat-exchanger cleaning and maintenance cycles by more than 50%, together with zero manual intervention for automatic blowdown.
For Jiangxi Salt Chemical’s 55,000 t/y high-strength calcium sulfate project, UNITE supplied multiple large-scale automatic candle filters that integrate solid-liquid separation, displacement washing, pressure dewatering, back-pulse cake release, automatic discharge, and PLC-based process control. The project improved filter-cake washing, supported calcium sulfate quality above the stated industry benchmark, and reduced manual maintenance costs by approximately 60% compared with traditional filtration equipment.
We use cookies to collect information about how you use this site. We use this information to make the website work as well as possible and improve our services.more details
