"The unit has run continously for the seven years I have been the technician..."

Horace Coleman is an I&C Technician at an ODEC Power Generation Facility in Virginia.

I have been responsible for our site's emissions equipment for seven years, and I have replaced many of the components in our system. However, I have never had an issue with my KNF pump. The unit has run continously for the seven years I have been the technican...and a year before that...before recently requiring a replacement diaphragm.
I would, and expect to use and recommend, KNF equipment moving forward in my career.

Horace is pictured with KNF's diaphragm sampling pump,
used extensively in the emissions control industry.

"My vote goes to KNF for an outstanding product"

Dennis Elvin is a Sr. Assistant Equipment Engineer at Fairchild Semiconductor in Maine.

At first I thought that writing a testimonial about a failed item wouldn't even get considered for publication, but then I figured that after being in the Semiconductor Maintenance field for nearly 29 years I've pretty much seen it all and STUFF just happens, and parts wear. What impressed me about the KNF diaphragm pump was that it had run 24/7 year after year for nearly 5 years before I needed to do anything with it. It was a very quick and easy repair to get right back into production. Now that's what I like! My vote goes to KNF for an outstanding product!

Dennis is pictured with KNF's N035 diaphragm pump, a reliable workhorse in the semiconductor industry.

"I found KNF to be quick to respond with helpful information."

Jenna Rapai works as the Micrometeorological Technician for the Department of Soil Science at the University of Manitoba, in Canada.

I have always found KNF pumps to be competitively priced and reliable. As a company, KNF is quick to respond with helpful information. They really listen to my question and respond with helpful information tailored to my specific application. Many of the projects I work on require the 24hr dedicated use of one or more pumps year round in some pretty harsh environments. One particular project in a remote area of northern Canada, when I needed to replace a pump from another company that was not up to the standard we needed, I contacted KNF. Not only did purchasing pumps from KNF cost less than half the price of the original pump, but the spare parts kits are cheaper as well. Additionally, being in a remote area, using KNF had a two fold benefit: First of all, the KNF pumps are compact and light weight, but still provide plenty of power. One person can easily carry one or two pumps at a time. Secondly, I was forced to describe through email the complicated procedure on how to remove the old pumps. Installing the new KNF pumps was easy to do, requiring no specialized tools or formal training. This meant that I was able to get the system back up and running with little delay. Since switching to KNF pumps at this site, I am happy to report that I have had no problems since with that part of the system.

Jenna is pictured at right after replacing a troublesome old pump with a new, KNF brushless DC pump.

"Thanks for all you do!"

Joe Guthrie works as a Repair Tech at Spectrum Systems Inc. in Pensacola FL.

KNF pump products and support are tops in the North American pump market.

Our experience is in the gas stack sample and laboratory pumps of several different models. KNF is responsive to requests for extraordinary parts support and unusual requests for technical background information. Thanks for all you do.

Joe is pictured in his workshop holding two KNF heated-head sampling pumps.

"The reasons why I replaced the peristaltic pumps with diaphragm pumps..."

Alexander Bozic, Dipl. Ing. (FH) is a Lab Manager at SANOFI AVENTIS, Frankfurt - Germany

I have been using Liquiports in our laboratory for quite some time now, and have also been involved in the development of the new SIMDOS dosing pump. These pumps are based on the diaphragm technology and give me some advantages which I would like to describe.

Because the diaphragm pumps are available with a PTFE diaphragm and a variety of head materials, they have a very high level chemical resistance and thus can handle a wide range of chemicals. This allows me more flexibility than with a peristaltic pump.

Further advantages when compared with a peristaltic pump are the favorable pulsation characteristics and the clearly higher operating pressure capability. On inspection of the maintenance intervals, it becomes clear that these are much longer for a diaphragm pump than the recommended lifetimes of the tubes for a peristaltic pump.

In general, the bearings of many peristaltic pumps are not fully enclosed, making them susceptible to corrosion. As is often the case, the tubes break and contaminate the bearings. This leads to premature bearing failure, an expensive repair. In the case of the diaphragm pumps, only the liquid can come into contact with the head parts.

Finally, peristaltic pumps which cover the same flow range, are much bigger and heavier than the equivalent diaphragm pump.

Alexander Bozic Sanofi Aventis - Frankfurt

Alexander is pictured holding a KNF SIMDOS 10 liquid transfer/dosing pump.