For Assistance with Spare Parts Kits, Operating Manuals, and Pump Repairs,
KNF Neuberger, Inc.
2 Black Forest Road
Trenton, NJ 08691-1810
Parts/Service: 609/890-8600 • Fax: 609/890-8323
LEGACY KNF pumps:
UN05, UN010, UN72-79: Spares
Kits and repair services are still available, in addition to updated replacement
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. Call Parts/Service
for a replacement instruction sheet or for spare parts replacement assistance.
More difficult repairs, such as bearing changes, require factory service.
Where can I buy a spare parts kit?
Contact KNF at 609-890-8600 or click on the Parts Kit
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
Instructions are in every spares
kit. We accept all
major credit cards.
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 email@example.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
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?
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.
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
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.
is the KNF limited warranty?
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
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
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.