"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 LIQUIPORT liquid transfer/dosing pump.

Other quotes from KNF pump users:

• "Pump has been in good service since new, (date code 3/99) doing nice job pulling on a flash evaporator inhaling nasty compounds. Pump just cleaned, and needed no spare parts...We are very satisfied with the product at this time" G.G., IL
• "The pump has been a work horse for the past three years. This is the first repair for the pump." K.K., OH
• "Very good more than 20 years working only the capacitor was changed." J.Z., Valencia, Spain
• "Really like great working pump and easy to rebuild." G.R., GA
• "Pump ran continuously for over 2 years before needing a rebuild." J.L., OH
• "Very Positive." C.H., FL
• "Yes, very reliable." S.H., KY
• "I have used KNF (OEM) pumps in my production for 22 yrs. I feel they are very reliable and easy to service. I would use no other pump." C.A., CA
• "Great pump with consistent seal life." R.N., CA
• "They are very reliable and durable." D.V., TX
• "The pump has proven to be a very durable item." J.S., FL
• "It has operated fine for ~2 years of near-continuous use." R.W., OR
• "This vacuum pumps operates quietly with almost maintenance-free." S.I., Malaysia
• "To date, we have been very satisfied with this pump." M.C., KS
• "In 4 year I never seen a broken KNFpump... so that should say enough, no?" D.M., Bucharest
• "Need less maintenance than others."
• "Increased our solvent recovery to >98%."
• "The pumps last 3 times longer than other types."
• "Convenient to use by undergraduate researchers."
• "Enjoy an excellent reputation in the field."

• "The pumps withstand student abuse very well."

• "Maintenance was very easy and handled on-site."
• "Are very quiet in the laboratory environment."
• "The KNF pump we just bought is so quiet we had to keep an eye on it for a day or two just to make sure it was running.

University Engineers choose KNF Flodos liquid pumps

Wageningen University selects pumps for EU-funded BioMinE project to apply innovative biotechnology-based processes as a sustainable solution in the recovery of metals from ores and waste materials

Martijn Bijmans, of the department of environmental technology, is using Stepdos 08RC diaphragm liquid metering pumps for his research in biological sulphate reduction at low pH He explained: "My research focuses on developing technologies for selective metal recovery from waste and process water from the mining and metallurgical industry, by optimising sulphide production in bioreactors to precipitate insoluble metal sulphides

"I use the Stepdos pumps to feed the reactor with the metal ions and sulphuric acid solution, as well as a KNF Neuberger Laboport N840 diaphragm vacuum pump to recycle the hydrogen gas over the reactors.

"These pumps provide a stable flow and do not need regular calibration. They are also compact and easy to operate, but the main beneficial feature for my work is their chemical resistance; they can withstand even high concentrations of acids that I am using. I have been using KNF pumps for about three years now, and they have been perfect for my applications".

Bijmans concluded: "I have also recommended these pumps to many of my colleagues, because I think KNF is pretty much the standard setter.

When your reputation depends on it...

A Testimonial from Bob Peters, Engineer, EcoChem Analytics

EcoChem Analytics, based in League City, Texas, offers only the highest quality analytical systems for air toxics and complete continuous emissions monitoring systems with their main business in the waste incineration market. Currently they are using UN026ST.11 heated head pumps. The stainless steel and PTFE construction, along with the heated pumping chamber, were selected because, in this field, they are never quite sure what sample gases are going to go through the pumps. “I have been using KNF pumps for nearly 20 years and they have proven to be extremely reliable with very little maintenance. They helped build our company’s reputation for solid, durable products. I have been approached by competitors with various promises; however, they cannot match the reliability of KNF. Our business is Continuous Emission Monitoring Systems. As the name implies, anything short of continuous-reliable performance damages our reputation. We refuse to take that risk.”

Explore More Possibilities...

Scientists seek understanding of extraterrestrial life with the aid of KNF LABOPORT pumps.

Life scientists at the University of North Dakota are using KNF LABOPORT® Diaphragm Vacuum pumps studying plant growth under conditions approaching the vacuum of outer space. This research is conducted within the Presidential Initiative for a "New Vision for Space Exploration" to explore future applications for greenhouses on the moon or other planets. "KNF LABOPORT® pumps are a very important technical and engineering component of our laboratory system because they can provide vacuums or varying amounts of pressure, and maintain those pressure levels precisely, a necessity in our research," commented Vadim Rygalov, Ph.D., who is Professor and lead scientist at the University's Department of Space Studies. "Both portable and easy to operate, KNF pumps are convenient to use by our undergraduate researchers. We have found them to be reliable as well," continues Dr. Rygalov. "We have a need for precise pressure and vacuum for long work hours."

Vadam Y. Rygalov, Ph.D., University of North Dakota, Department of Space Studies Read the whole story HERE.

Redefine High Performance

...previously we used oil-lubricated pumps, but these needed significant amounts of maintenance due to corrosive solvents mixing with the oil. We heard that KNF manufactured a chemically-resistant pump that needed less maintenance...after two years, the LABOPORT pumps have proved very reliable. In fact, they have lasted three times longer than any other pump we have used.

Patrick Bureau, Research Developer, Aegera Therapeutics, Inc. Read the whole story HERE.

Maximize Time and Resources

...we soon noticed that the pumps from other brands were constantly breaking down but those from KNF were not. Pumps take some abuse in our laboratories and we had to replace diaphragms and parts of the other pumps almost weekly, but the KNF pumps withstood everything well and the maintenance on them was easy. The difference between the two was as clear as night and day...

Jack Church, Facility Manager, CB Research and Development, Inc.
Read the whole story HERE.

Choose Clean Technology

...based on conversations with our colleagues in university and industrial research labs, we learned that KNF pumps had a good reputation, and therefore chose them for our labs...they have proved to be very quiet, but they have helped us to increase our solvent recovery yield to more than 98 percent.

Dr. Ken Simolo, Department of Chemistry, University of Rochester

Syncom chooses KNF pumps for chemical processes

Syncom in Groningen, the Netherlands, a contract researcher for pharmaceutical and chemical companies, has chosen the Liquiport diaphragm pumps from KNF Flodos to use in its laboratories.

"We have been using Liquiport 18RC pumps mainly to load columns for column chromatography and to transfer liquid into reaction vessels," explained Fred Leusink, research chemist group leader and equipment manager at Syncom. "The Liquiport's chemical resistance enables us to use the pumps for a very broad range of applications. They are easy to clean and to swap solvents, and are very easy to use - you just turn a knob to find the right flow rate, without unnecessary screens or displays. They also have an interface for external control which offers the potential to control the pump using an analogue signal."

"We have also been using vacuum pumps from KNF Neuberger for over 10 years, including over 100 each of Laboport SC840 and N811 units. Every time we expand we get more of the same pumps, because these pumps are reliable, easy to use and are suitable for many of our applications." Leusink concluded: "KNF's service and support are excellent, and we would definitely go back for more of their pumps in the future."