The pump brand OEMs demand

KNF’s experience with established designs, materials and motors allows us to optimize standard pumps to fit your exact specifications by offering a variety of options:

• Performance modifications
• Economical BLDC motors
• Custom pump connections
• Custom mounting plates
• Electrical terminations and harnesses
• Shock and vibration isolation
• Finishes and coatings

Wide selection of materials include:

• Aluminum
• Polypropylene
• Buna-N
• Nickel-plated
• Ceramic
• PTFE
• PPS
• Hastelloy

• EPDM
• PVDF
• 316 Stainless
• FFPM
• FPM
• Neoprene
• PEE

A tradition of innovation

Our reputation for OEM collaboration, technical expertise and manufacturing leadership is founded on a mission to resolve the specialized challenges of our customers with the most advanced customized and standard product solutions available. KNF approaches each collaborative engineering effort with our customers as an opportunity for technical problem solving. The resulting pump solutions have established KNF as the premier U.S. diaphragm pump manufacturer. Contact KNF today for flexible OEM pump solutions. Whether your pump design challenge is simple or complex, KNF provides the technical expertise, precision engineering and rapid production turnaround with world class customer service to make your project a success.

Read KNF's article "Selecting the Right Pump for the Job"

View our Video on motor selection

Why wait for the mail?  Have a KNF data sheet in front of you while discussing your application with our engineers.  Select a pump type on the tabs above, then click on the listed pump model numbers to download the datasheets.

Across the industry, there's not a more widely-respected quality standard than ISO 9001:2008. ISO 9001:2000 is a rigorous international quality standard that is accepted by the majority of the world.
Click on the icon to view our certificate.

Be wary of others who simply claim to "meet" ISO standards. Ask for their certificate.

KNF engineers molded a threaded metal stud into the diaphragm body, which eliminates the bulky clamping disk, still used by many pump manufacurers.The resulting diaphragm (on right side), is smooth across and pliable, and fits closer to the pump head. This reduces dead space and improves maximum vacuum ratings to 27 in. Hg per head. Gone is an occasional source of leaks and corrosion.

Another breakthrough in diaphragm technology occurred when KNF engineers used FEA methods to mold a structured radial grid into the diaphragm's bottom surface to control the flexibility characteristics of the diaphragm. Performance, diaphragm life and efficiency increased, and we were able to significantly reduce pump size.

Tough Valve Systems

KNF's tough, one-piece, mult-port valve disks easily withstand the punishment created by pumping uncompressible liquid droplets, which, with conventional valves, usually results in drastically reduced performance, causing inconvenient repair delays and equipment downtime and reducing noise.