What are? How do they work? What are they used for?
KNF PUMPS - An underrated tool in laboratories
The job of a good supplier of laboratory instruments is to make the customer's choice as simple as possible, exposing the potential of the devices with clarity, thanks to years of experience in the sector and knowing the manufacturers for some time, their strengths. and their innovations. Precisely, it is central to provide latest generation products, in step with the times, respecting the customer's budget, improving the conditions of his laboratory (comfort, safety), productivity and the quality of his work. For this Jointlab relies on KNF products: easy-to-use devices, with a compact design, intelligent functions, silence, high performance and absolute reliability.
In this guide we will introduce you to KNF products and guide you to the pump you are looking for depending on the application you are going to make of it. You will discover how vacuum pumps can be very useful in a scientific, chemical and analytical laboratory by simplifying and optimizing routine work.
Ready to find out how to improve your lab?
BUT WHAT IS A VACUUM DIAPHRAGM PUMP?
The diaphragm pump, also called diaphragm, is a type of vacuum pump where a mechanical movement moves a diaphragm up and down, sucking in and pushing the fluid or gas. Well yes! Diaphragm pumps transfer, compress and evacuate liquids, gases and vapors (depending on the version).
The advantage of this type of vacuum pump is its complete waterproofness. Indeed, the diaphragm hermetically seals the compression chamber from the drive mechanism. The pump transfers, evacuates and compresses the fluid without the need for oil, avoiding unwanted, counterproductive and harmful contamination in scientific, chemical and analytical laboratory applications.
The technical drawing:
1 - Outlet valve
2 - Inlet valve
3 - Transfer chamber
4 - Diaphragm
5 - Eccentric
6 - Connecting rod
In the video, the operation of a simple diaphragm pump.
Step by step: The elastic diaphragm (diaphragm; 4) is moved up and down by the eccentric (5) and the connecting rod (6). Moving downwards, it sucks in the gas or liquid to be transferred via the inlet valve (2). Returning upwards, the diaphragm presses the substance
through the drain valve (1). The transfer chamber (3) is separated from the movement of the pump by the diaphragm (4), avoiding any contamination.
But let's go inside a laboratory! Why get a new vacuum pump? Why use an electronic vacuum control? In the video alongside an example with an evaporator.
TYPES OF VACUUM PUMPS FOR THE LABORATORY
Below are the laboratory pumps that KNF offers, divided by category.Click on the model names to go to the product page, get more information and know the prices.
MINI MEMBRANE VACUUM PUMPS
→ N 86 KT.18 - Small, economical and suitable for almost all uses; flow rate 5,5 l/min and final vacuum 160 mbar
→ Laboport N 96 - flow rate 7 l/min, final vacuum 130 mbar and IP40
→ Laboport N 816.3 KT.18 - flow rate 16 l/min, final vacuum 20 mbar and IP20
→ Laboport N 816.1.2 KT.18 - flow rate 30 l/min, final vacuum 160 mbar and IP20
→ Laboport N 938.50 KT.18 - flow rate 30 l/min, final vacuum 15mmbar and IP20
MEMBRANE VACUUM PUMP
→ Laboport N 820.3 FT.18 - flow rate 20 l/min, final vacuum 8 mbar and IP44
→ Laboport N 840.3 FT.18 - flow rate 34 l/min, final vacuum 8 mbar and IP44
For neutral, slightly aggressive and corrosive gases and vapors:
→ N 920 KT.29.18 G - flow rate 21 l/min, max vacuum 2 mbar and IP20
→ Laboport N 842.3 KT.18 - Flow rate 34 l/min, max vacuum 2 mbar and IP44
→ Laboport N 820 G - Flow rate 20 l/min, max vacuum 6 mbar and IP30
→ Laboport N 840 G - Flow rate 34 l/min, max vacuum 6 mbar and IP30
MEMBRANE VACUUM PUMP FOR WET GAS
With automatic drying system for gases loaded with humidity
→ Laboport N 820.3 FT.40.18 - flow rate 20 l / min and final vacuum 10 mbar
→ Laboport N 840.3 FT.40.18 - flow rate 34 l / min and final vacuum 10 mbar
→ Laboport N 860.3 FT.40.18 - flow rate 60 l / min and final vacuum 4 mbar
COMPLETE SYSTEMS
System with two separator bottles on the suction and pressure side:
→ Laboport SR 820 G - Flow rate 20 l / min, max vacuum 6 mbar and IP30
→ Laboport SR 840 G - Flow rate 34 l / min, max vacuum 6 mbar and IP30
System with separator on the suction side and high performance condenser on the pressure side:
→ New! Laboport SH 820 G - Flow rate 20 l / min, max vacuum 6 mbar and IP30
→ New! Laboport SH 840 G - Flow rate 34 l / min, max vacuum 6 mbar and IP30
System with separator on the suction side, high performance condenser on the pressure side and Wifi device for remote vacuum control:
→ New! Laboport SC 820 G - Flow rate 20 l / min, max vacuum 6 mbar and IP30
→ New! Laboport SC 840 G - Flow rate 34 l / min, max vacuum 6 mbar and IP30
DIAPHRAGM DOSING PUMP FOR LIQUIDS
SIMDOS series
→ Simdos 02 FEM 1.02 KT 18 S - flow rate 0.03-20 ml / min, final vacuum 6 mbar and IP65
→ Simdos 10 FEM 1.10 KT.18 S- flow rate 1-100 ml / min, final vacuum 6 mbar and IP65
DIAPHRAGM PUMP FOR THE TRANSFER OF LIQUIDS
LIQUIPORT Series
→ Liquiport NF 1.100 S - flow rate 0.2-1.3 l / min, final vacuum 4 mbar and IP65
→ Liquiport NF 100 S - flow rate 0.2-1.3 l / min, final vacuum 1 mbar and IP65
→ Liquiport NF 1.300 S - flow rate 0.5 - 3.0 ml / min, final vacuum 4 mbar and IP65
→ Liquiport NF 300 S - flow rate 0.5 - 3.0 ml / min, final vacuum 1 mbar and IP65
* All models are available with a foot switch, plus manual control as standard.
*The pumps we offer have a PP head (polypropylene, KNF 'KT'), but are also available in other materials, depending on the model.
Below are the KNF terms for the materials of the heads, with their meaning:
KT = PP; polypropylene
TT = PVDF; Polyvinyldenfluoride
KN = PPS; Polyparaphenylene sulfide
FT = PTFE; Polytetrafluoroethylene
Presentation video of the new LABOPORT models. Would you like to know more? Read our article about it: LABOPORT KNF
