For Assistance with Spare Parts Kits, Operating Manuals, and Pump Repairs, contact:

KNF NEUBERGER CUSTOMER SERVICE
2 Black Forest Road
Trenton, NJ 08691-1810
Customer Service: 609/890-8600 • Fax: 609/890-8323

LEGACY KNF pumps: UN05, UN010, UN72-79: Spare Kits and repair services are still available, in addition to updated replacement models.

Can I replace the diaphragm and valves myself?

Replacement kits are easily installed using everyday tools. Instructions are included in every spares kit. One kit services one head.

Where can I buy a spare parts kit?

Contact KNF at 609-890-8600. We accept all major credit cards.
Click on the Parts Kit Price request tab above to obtain a spare parts kit quotation for your pump.
Always keep a kit or two on hand to save yourself valuable time. One spare parts kit per pump head.
Instructions are in every spares kit.

How do I ship a pump to KNF for repairs?

Customers in other countries, please click HERE for an address of a KNF office or representative nearest you.
To get the process started immediately:

1) Download and print a copy of our RMA Request form. Tab above.

2) Fill out the form and fax to 609-890-8323, or save to your computer and email to rma@knf.com. Be sure to include your phone number.

3) Call KNF Customer Service 609/890-8600 during normal business hours 8:00 a.m. to 4:30 p.m. (EST) and explain that you faxed in the form and want to return a pump for repairs.

4) You will be faxed an RMA return instruction form with an RMA number which must be displayed on the outside of the shipping carton. Include Material Safety Data sheets and other details before returning the pump.

Pack the pump properly. Wads of newspaper or peanuts are unacceptable packing materials, as the pump is heavy and settles to the bottom of the carton where it will most likely suffer damage. Foam blocks, or the original packing materials, if available, are best. KNF is not responsible for incoming shipping damage.

I need a pump that is capable of starting under system pressure or vacuum. Is this possible?

Because of the large surface area of a diaphragm, and the fact that one side of that diaphragm is exposed to atmospheric pressure, the standard pump motor is designed to start with both ports at atmospheric pressure. If you specify otherwise, we can modify a pump to start under a pressure or vacuum load. It's best to discuss your application with one of our engineers.

Do I need to protect my KNF vacuum pump from liquid condensate?

The new multi-port valve system used in the KNF's N8X and N8XX series of pumps is highly tolerant of occasional liquid droplets. It is not, however, designed to pump liquids. KNF liquid pumps are designed to pump liquids.

Earlier model pumps using the traditional "flapper" valves should be protected from condensate by positioning the pump at the highest point in the system, so accumulated condensate drains away from the pump, or by providing a trap.

Not sure what type of valves your pump has? Call us, and ask to speak to one of our applications engineers.

I cannot find my PU, PU, PM, or PML pump listed on your website. Are these items still available?

KNF makes a variety of special, proprietary design pumps that are used by other manufacturers in their equipment, such as medical devices, stack gas samplers and exhaust gas analyzers. These models have been modified. They are not standard product. Complete replacement pumps are available only from the instrument manufacturer, but spare parts and repair services are available from KNF Customer Service.

Models that begin with N or UN are always available from KNF as a complete pump assembly or spare parts kits, and we also perform factory repairs. Contact Customer Service if you have any questions about these models. Request a spares kit price quote HERE.

What is the KNF limited warranty?

Limited Warranty - KNF NEUBERGER, INC. (KNF) warrants to buyer that its products will be free from defects in material and workmanship under normal and appropriate use, and agrees to repair or replace any of its products without charge for parts or labor within one year from the date of shipment to the original purchaser.

Products to be evaluated for warranty coverage: Determination of coverage under this warranty is the sole responsibility of the manufacturing engineering representative of KNF. This determination will frequently require the return of the product to KNF. All product returns will be handled in accordance with KNF's product return policy. KNF reserves the right to inspect custom installations and devices that use KNF products as part of the warranty evaluation process. This warranty does not cover any misuse, negligence, deterioration by chemical action, unauthorized repair or alteration in any way, inappropriate handling or storage that in our judgement caused the product failure. KNF shall not be liable for any inconvenience, loss of use, or any consequential loss, damage or injury arising from any cause whatsoever. No employee, agent or representative of KNF shall have any right or authority to vary or alter the terms of this warranty. This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

Limitations: KNF offers engineering and technical assistance to support the application and selection of our products. Except as otherwise agreed to in writing, it is expressly understood that this warranty is in lieu of any and all other warranties, whether expressed or implied, with respect to the goods sold, including any warranty of merchantability and fitness for a particular purpose. Sole responsibility or liability of KNF shall be to replace any products or parts thereof which shall not conform to such warranty, provided that the products are used in accordance with KNF specifications. Customer is responsible for determining the suitability of our products for customer's use or resale, or for incorporating them into objects or for applications which customer designs, assembles constructs or manufactures. Please call our Technical Sales Department for further information.

Return Requests / Inquiries: Direct all warranty and repair requests to KNF Customer Service Department for instructions before returning any unit for repair or evaluation. We will fax you a "Return Instruction Sheet" for guidance on the proper marking, packing and documentation requirements. Important information conforming to the "Right To Know" act, such as a Material Safety Data Sheet may be required.