Ingersoll Rand vacuum pumps help the negative pressure material handling industry

In many industries where small granular or powdered materials need to be conveyed from one place to another, positive pressure, negative pressure and mixed conveying methods can be used.



Negative pressure conveying

Positive pressure conveying


1. dust-free discharge and dust-free conveying.

2. suitable for conveying in bulk, low-lying areas, etc.

3. the air source is at the far end, lubricant, moisture, etc. will not be mixed in.

4. negative pressure vacuum in the pipe, no leakage of materials.

5. convenient air handling, suitable for the occasions requiring clean air conveying.

6. it is suitable for centralized conveying from many places to one place.


1. the temperature of the gas during conveying can dry the material

2. positive pressure inside the system, the material is easy to unload

3. positive pressure in the pipeline, even if there are gaps in the system connection outside the atmosphere, rain will not affect the material in the pipeline.

4. compared with the negative pressure conveying, energy consumption is low, can convey a long distance.



1. the general working vacuum is higher than -0.06MPa, so the conveying volume and conveying distance can not obtain the maximum value at the same time.

2. compared with positive pressure conveying, negative pressure consumes more than positive pressure.

3. reliable separation and dust removal devices should be installed before the material and gas separation.

4. the requirements for the unloader under the separator are very high, poor sealing and leakage will cause system instability.


1. the requirements for negative pressure conveying are high, and different feeding devices should be selected and designed according to the characteristics of the materials to be conveyed and the conveying parameters.

2. must use a good sealing material supply device


Oil type rotary vane vacuum pump


High ultimate vacuum level.

High efficiency.       

Mature and reliable structure, long service life.

Air-cooled design, simple and convenient to install and take over.



Higher maintenance cost. 

Exhaust gas contains a small amount of oil mist.


Claw pump

Dry vacuum pump, no need to add lubricant to the working section.

Simple structure, reliable operation.

Energy saving, compared with rotary vane pump and water ring pump, the average energy saving is about 30%.

Low running cost, no wearing parts.

Variable frequency control is available.

Explosion-proof ATEX certification.


Oil screw vacuum pump

rotary screw
High flow rate of single unit, suitable for a variety of large pumping speed applications.

Integrated design, integrated control, small footprint.

High pumping speed and high vacuum.

Variable frequency operation.

Three-stage gas/oil separation technology.

Direct drive, stable and efficient operation.

Air-cooled and water-cooled cooling methods.

Customer Case Sharing

Case one - a material conveying customer

Material: Pine pollen

Solution: 4 sets of VLR251

Single flow rate: 210m³/h

Vacuum degree:200mbar(abs.)

Case two - milk powder industry

Yili, Nestle, Feihe, Wandashan, Junlebao, Sanyuan, Mengniu, Huishan, Red Star Dairy

Case three - electronics industry Vacuum dust removal

Technical requirements: 800CMH *-30kpa * 37KW

Solution: 2BH1910-1HK26

Power: 15kW

Industry Preferred Brand

Ingersoll-Richlis brand rotary vane pumps and claw pumps have been widely used in the conveying process of milk powder, food powder and industrial powder, with huge application space in the industry.