Never again be delayed by expensive off-site pump repairs. With LABOPORT®, there’s no need to worry about corrosive condensate damaging valve parts and degrading performance. Click on the testimonial tab to hear it straight from our customers; KNF pumps are tough, have a loyal following and last longer than other brands.
Here's why:

KNF Invented the Molded Diaphragm to Handle Aggressive Vapors

KNF engineers took the older, traditional flat diaphragm (shown at left) with its middle hole and bulky metal clamping disk, and created a smooth, molded diaphragm.

Exclusive Structured Diaphragm for Long Life and High Efficiency

Without a metal clamping disk in the wetted area, we avoid leaks and corrosion. The diaphragm surface fits closer to the top of the pump chamber, improving vacuum performance. The connecting stud is securely molded into the diaphragm.

Next, using finite element analysis, we created a ribbed structure into the underside to control the flexing of the diaphragm. As a result, diaphragm life and efficiency are increased, and resulted in a significant reduction in pump size.

Wetted Parts of PTFE Resin for Durability

KNF builds their lab pumps with premium PTFE and FFPM resins for the ultimate protection against aggressive vapors. KNF pioneered the use of PTFE in laboratory pumps in 1980. This material is now used in all LABOPORT® pumps.

Patented, Multi-Port Valve System Tolerates Condensates

This new valve design is a patented breakthrough of KNF’s worldwide R&D center in Munzingen, Germany. One-piece construction prevents excessive movement, reducing pneumatic noise. The valve disk, made of FFPM resin, spans several smaller holes instead of one large hole. It withstands the punishment created by pumping liquid droplets.

Other, less efficient flapper-type valves (left side) are easily deformed by liquids; necessitating inconvenient delays and equipment downtime.

Compatible with ALL brands of rotary evaporators

Consider a KNF LABOPORT® pump for quiet, reliable operation without the messy handling of pump oil or the expense of water aspirators. They are the perfect replacement for rotary vane pumps in applications where a variety of corrosive vapors may be encountered. And they will require less maintenance than any other brand in your lab, resulting in less downtime, and fewer disruptions in your day.

LABOPORT® pumps are the perfect companion for any brand of rotary evaporator.
Model UN842.3FTP shown above.

Self-Cleaning Vacuum Pumps for Saturated Vapors

Use with gel dryers, vacuum ovens, vacuum concentrators and even rotary evaporators.

Because insufficient air flow cannot push liquids thru the pump, vapors condense and accumulate within a vacuum pump's heads. This reduces pump efficiency and extends process time.
How it works: The timed Powerdry® valve meters a burst of ambient air into the pump. This sudden flow of air expels liquids out of the pump heads, immediately restoring efficiency. Your vacuum levels are unaffected.
Unlike other self-cleaning pumps that cycle at the end of the vacuum process, PowerDry® operates throughout the process, when you need it most.

Model UN820.3FT.40P PowerDry equipped pump.