Vacuum Filter is an apparatus for separating suspensions that is, liquids that contain solid particles in a suspended state. The separation takes place as a result of the pressure difference created by a vacuum pump above and below the filter baffle plate. There are periodic-action and continuous-action vacuum filters. The latter is a horizontal rotating drum that is divided inside by radial hermetic baffle plates into individual cells that are connected by tubes to the distributing head. Depending on the position of the drum in its rotation, a vacuum or excess pressure is created in the cells.

During rotation, the drum surface moves through the filtration zone, where the liquid is sucked into the drum and the solid particles settle onto the filter membrane. After the sediment has been washed with water, the drum enters the drying zone, where air is passed through the sediment, and then into the sediment-removal zone. Here compressed air is supplied from the inside of the drum, and the sediment is cut away from the drum surface by a knife. There are also continuous-action disk, conveyor, plate, rotary, and other types of vacuum filters. Vacuum filters are widely used in chemical and other industrial applications.

Vacuum Suction Filter



  • High quality borosilicate glass 3.3 with excellent physical and chemical properties for glass parts and SUS 304 stainless steel frame.
  • Perfect sealing property and no dead corner design for charging solution or powder more easily.
  • One vacuum valves for connecting vacuum pump for processing vacuum filtration.
  • Cost-saving modular design and can be customized by clients’requirements.
  • Safe in operation, easy to move around with lockable casters.

Technical Specifications

Glass material
Frame material
Stainless steel
Pipe material
304stainless steel
Collection bottle volume
Sphere 10L
Sphere 20L
Sphere 30L
Sphere 50L
Funnel size (mm*mm)
Funnel material
Stainless steel
Distance between dumping opening and ground (mm)
Filter opening
φ80flange opening
Air exhaust device
24#standard bucket valve
Exterior size(mm*mm*mm)
Packing size(mm*mm*mm)

  • Vacuum Pump



Technical Specifications

Power (W)180
Power Supply110v (1 Phase, 60Hz) or 220-240V (1 phase, 50/60Hz)
Flow Rate (L/min)80
Lift (m)10
Ultimate Vacuum (MPa)-0.098 (2KPa)
Single Tap Air Suction Amount10
Tap Number2
SafetyCheck Valve
Water Tank Capacity (L)15
Water Tank MaterialPP
Dimensions (mm)385W*280D*420H
Weight (kg)11

  • Cooling Circulator




Lab Low Temperature Chiller Cooling Cycle Chiller

Technical Specifications

Temperature range(°C)-30~Room temp
Temperature stability(°C)±2
Cooling capacity (W)10°C1860
Bath volume(L)10
Bath opening(mm)Diameter 210×250
Ambient temperature(°C)5~25
Power Supply(V/Hz)220/50
Overall Power(W)1100
MaterialsOf Machine CasingSPCC steel with powder coating

How Does Vacuum Filtration Work?

Vacuum filtration is an operation of evacuating the air below the filter paper to maintain the pressure differential across the filter medium. It increases the rate of filtration through the force on the solution over gravity.

When setting vacuum filtration, the first step is fitting the Buchner funnel to a suction flask. After that, we can connect the side arm of the flask to our vacuum pump which is of high quality, advanced design, and high efficiency.

Next step is to put the filter paper into the funnel and wash it with the solution. Don’t forget to get the right filter paper which has the right material, pore size, and the right size to your funnel. After that, you can decant the liquid phase into the funnel first and then add the precipitate.

To get the better result, you’d better add a little bit of wash liquid over the surface of the precipitate to wash it. The force of vacuum will draw the liquid through the solid slowly. At the same time, the precipitate will be dry out by drawing a current of air through it.

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