Negative Pressure Filter Equipment for Sale

Negative pressure filter equipment, backed by over 20 years of R&D and manufacturing at Hesheng, fully automates filtration, counter-current cake washing, dewatering, cake discharge, and cloth cleaning.

Our negative pressure filtration systems include horizontal vacuum belt filters, vacuum tray belt filters and ceramic disc vacuum filters. Each design handles the filtration cycle differently, so equipment selection should be based on the slurry itself rather than the filtration principle alone.

For a new project, we normally evaluate feed concentration, particle-size distribution, required dry-solids capacity, cake-washing requirements, target cake moisture, corrosion conditions and available installation space before recommending a filter configuration.

Videos of Negative Pressure Filter Equipment

Types of Negative Pressure Filter Equipment

Different negative pressure filters are suited to different slurry behavior, washing requirements and production conditions.

Horizontal Vacuum Belt Filter

The DU horizontal vacuum belt filter provides continuous filtration over a moving filter cloth and is particularly suitable where large filtration area, continuous cake washing and separate collection of mother liquor and wash liquid are required.

Vacuum Tray Belt Filter

The DI vacuum tray belt filter uses an indexing operating cycle rather than a continuously moving vacuum box. This structure can be considered where the process benefits from staged filtration and controlled movement between filtration steps.

DI Horizontal Vacuum Tray Belt Filter

Ceramic Disc Vacuum Filter

The CF ceramic vacuum disc filter uses rotating microporous ceramic plates as the filtration medium. It is commonly considered for suitable mineral concentrates and tailings where continuous filtration and ceramic-media regeneration are required.

Specifications of Negative Pressure Filter Equipment

specifications of negative pressure equipment

Choosing the Right Negative Pressure Equipment for Your Needs

We can base on our rich experience in different applications to give good suggestion for clients to choose right type of negative pressure equipment. We also can get the slurry sample from clients to do dewatering tests for free to choose right type of filter and cloth, design the filter correct size, so as to supply a complete and good solution to clients.

Negative Pressure vs. Positive Pressure Filtration

Factor	Negative Pressure Filtration	Positive Pressure Filtration
Pressure source	Vacuum on the filtrate side	Pressure applied to the feed side
Typical operation	Often continuous	Continuous or batch, depending on equipment
Filtration pressure	Limited by the available vacuum	Can operate at higher pressure
Cake washing	Well suited to staged washing on applicable equipment	Possible, depending on filter design
Typical equipment	Vacuum belt filter, tray belt filter, ceramic vacuum filter	Filter press, tower press, pressure filter
Better suited when	Continuous filtration and washing are priorities	Higher pressure is needed for further dewatering

For a more detailed explanation of the filtration principles and equipment differences, see our guide to negative pressure filtration and positive pressure filtration.

Working Process of Negative Pressure Filtration Equipment

Negative pressure filtration creates a pressure difference across the filter medium. A vacuum source draws liquid through filter cloth, ceramic plates or another porous filtration surface, while solids remain on the feed side and gradually form a filter cake.

In continuous equipment, the process normally continues beyond initial cake formation. Depending on the machine, the cake may pass through washing and additional vacuum dewatering stages before discharge, after which the filter medium is cleaned or regenerated for the next cycle.

The detailed operating sequence differs between belt filters, tray filters and ceramic disc filters.