China Suppliers Industrial Grade Asphalt Filter Strainer Unit from Leading Factory for High-Temperature Liquid Purification
Main Functions
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Filter and remove impurities such as sand, rust, oxidized lumps, and woven fabric debris from the asphalt, protecting downstream equipment.
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Protect the equipment from being worn down by impurities, which could damage the asphalt pump, damage the flow meter, clog the spray gun, coil pipe and mold.
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Stabilize production and prevent supply interruption, uneven spraying and product defects due to impurity blockages.
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Improve quality and enhance the purity of the asphalt, especially showing significant effects on modified asphalt, emulsified asphalt, and carbon-based asphalt.
Common Structures and Types
Vertical cylindrical structure, with stainless steel filter baskets inside.
Easy to disassemble and assemble, large capacity for holding contaminants, most commonly used.
Small in size, low in resistance, mostly used for branch pipes and before pumps for simple filtration.
Two filter tubes connected in parallel, capable of switching and cleaning without production halt.
Suitable for continuous production lines (mixing stations, modified asphalt, carbon plants).
Automatically scrapes off impurities on the filter screen, no need for manual disassembly and cleaning, suitable for systems with high automation levels.
Working Characteristics
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Working Temperature: Usually 130 - 200℃.
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Material: Cylinder made of carbon steel, filter screen made of stainless steel.
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It must be equipped with heating/insulation (such as thermal oil, steam or electric heating) to prevent the asphalt from cooling and solidifying and blocking the filter screen.
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Common filtration accuracy: 20 - 80 mesh, selected according to process requirements.
Typical Installation Locations
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Before the inlet of the asphalt pump.
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Before the metering device.
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Before the spraying system and spray gun.
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At the front end of the modified asphalt and emulsified asphalt production equipment.
Differences from a Buffer Tank
Designed for pressure stabilization, heat retention, degassing, and temporary storage.
Specifically removes solid impurities; has no pressure stabilization or material storage function.
Frequently Asked Questions
What are the primary functions of an asphalt filter?
An asphalt filter removes solid impurities (such as sand, rust, and debris) to protect downstream equipment like pumps and flow meters, stabilize production, prevent blockages, and improve the overall purity of the asphalt.
What are the common types of asphalt filters used?
The most common structures include Basket Filters (Cylinder Filters), Y-type Filters, Double-tube Switching Filters (for continuous production), and Self-cleaning Asphalt Filters.
What are the typical materials and working temperatures for these filters?
Asphalt filters typically operate at temperatures between 130 - 200℃. The filter cylinders are commonly made of carbon steel, while the internal filter screens are constructed from stainless steel.
Why is heating or insulation necessary for an asphalt filter?
Heating or insulation (via thermal oil, steam, or electric heating) is crucial to prevent the asphalt from cooling, solidifying, and clogging the filter screen, which would disrupt the flow.
Where should an asphalt filter be installed?
Typical installation locations include before the inlet of the asphalt pump, before metering devices, before spraying systems/spray guns, and at the front end of modified or emulsified asphalt production equipment.
How does an asphalt filter differ from a buffer tank?
A buffer tank is used for pressure stabilization, heat retention, degassing, and temporary storage. In contrast, an asphalt filter is dedicated solely to removing solid impurities and does not offer pressure stabilization or material storage functions.