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Pumping from vacuum

Fluid Handling

Pumping liquids from a tank with a negative pressure or even with (high) vacuum is not an easy task. The only driving force that still exists to get the liquid into the pump is gravity. In such cases, the so-called NPSHa (“net positive suction head available”) is usually very low. Then it is extremely important that the pump has an even lower NPSHr (net positive suction head required).
Do you want to pump a fluid from a negative pressure or even from vacuum?

Our solutions

Precisely gear pumps are characterized by a very low NPSHr and are therefore ideally suited for pumping fluids from vacuum. Where for centrifugal pumps the NPSHr is mostly a few meters water column (mlc), gear pumps have a NPSHr of a few centimeters mlc. This is achieved by low speed, high inlet and high suction power of this type of pump.

It is even possible to pump a highly viscous polymer from a vacuum tank with a positive feed height of only a few decimeters with a gear pump!!

Our gear pumps are also used under thin film evaporators (in which vacuum conditions exist) to pump the so-called bottom product from a collector. For example, when processing oligomers.

Suurmond offers solutions for this application for production, R&D and laboratory.

MAAG gear pumps (*) - flow from 0.5 to 2’400 l./min.
Whether or not with magnetic coupling and possibly equipped with a (heated) double hot containment shroud in case of solidifying liquids.

GATHER magnetically coupled gear pumps – flow from 0.33 ml/min to 66.7 l/min

HNPM micro gear pumps - flows 1.5 µl/min to 1.1 l/min. 
For example for under a destillation column in a laboratory.

(*) both MAAG industrial pumps and polymer pump type VACOREX®

Suurmond supplies solutions to optimize your process and improve the quality of your end-product. Our specialists will be happy to advise you.

Let's talk!

Let's talk!

Suurmond BV
The Netherlands
T +31 (341) 25 49 00 

Voltweg 2
8071 CZ Nunspeet
info.nl@suurmond.com

CoC 08142400
VAT NL815360800B01

Suurmond BV
Belgium and Luxembourg
T +32 (3) 54 44 070

Noorderlaan 109
2030 Antwerp
info.be@suurmond.com

Company no. 0440573109
VAT BE-0440.573.109

Suurmond UK Ltd
Great Britain & Ireland
T +44 (1386) 423 756

7e Enterprise Way
Evesham, Worcester
info.uk@suurmond.com

Registration no. 5113524
VAT GB 845 7137 10

Suurmond (France)
France
T +33 (474) 02 66 75

Parc Millésime, bâtiment 4
119 rue Michel Aulas
69400 Limas
info.fr@suurmond.com

VAT: FR59815325303
Registration no.: 59 815 325 303

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