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KNF UN840.3FT.40P IP44-T Diaphragm Pump
KNF UN840.3FT.40P IP44-T Diaphragm Pump

Manufacturer's List Price: $5,451.07
Our Price: $3,866.44
Money Saved: $1,584.63

Condition: Brand New
Warranty: 1 Year Manufacturer's Warranty
Typically Ships Within: 10 to 12 Weeks

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Quantity in Stock:2

Product Code: UN840.3FT.40P

Technical Specification Sheet (NEW)

KNF UN840.3FT.40P IP44-T Diaphragm Pump

The KNF UN840.3FT.40P IP44-T Diaphragm Pump Diaphragm Pump features an integrated KNF self-drying system. Designed for a wide range of applications in laboratories, including vacuum drying of chambers (for drying or heat-treating substances and components) or steam sterilizers for sterilizing instruments, vessels, filters and textiles. The KNF UN840.3FT.40P IP44-T Diaphragm Pump Diaphragm Pump Diaphragm Pump can be used very universally due to its high resistance to aggressive media.

The KNF self-drying system allows condensed liquid to be blown out of the pump heads at a high speed during evacuation. The drying cycle can be adjusted to the requirements of the individual process using three variables.

The KNF UN840.3FT.40P IP44-T Diaphragm Pump Diaphragm Pump Diaphragm Pump is chemical-resistant, therefore suitable for highly aggressive or corrosive gasses and vapors. This pump is 115V.

The KNF UN840.3FT.40P IP44-T Diaphragm Pump includes:
  • Power Cord
  • Operator's Guide
  • Manufacturer's Documentation
  • 1 Year Manufacturer's Warranty

KNF UN840.3FT.40P IP44-T Diaphragm Pump Specifications

Max. Permissible Operating Pressure

(bar g)


Ultimate Vacuum (mbar abs.)


Delivery Rate at atm. Pressure (l/min)


Hose Connection (mm)

ID 10

Permissible Ambient Temperature

Permissible Media Temperature

+ 5 °C to + 40 °C

+ 5 °C to + 40 °C

Maximum Permissible

Ambient Relative Humidity

80 % for temperatures up to 31 °C,

decreasing linearly to 50 % at 40 °C

Max. Altitude of site

(m above sea level)


Weight (kg)

Dimensions (L x H x W) (mm)


341 x 239 x 189

Protection Class Motor






Frequency (Hz)




Max. operating current (A)




Power consumption pump (W)




Max. permitted mains voltage


+/- 10 %

+/- 10 %

+/- 10 %

Fuse pump**
(2x) T (A)




Why Buy From Marshall Scientific?

Marshall Scientific's primary goal is to enhance your laboratory research at a more affordable price. Our industry-trained customer service team is always here to assist you along every step of your purchase, from initial product questions to technical support, and everything in-between. With our connection to some of the industry's largest manufacturers, we can ensure you receive the lowest price without sacrificing quality whatsoever.

Brand-New Products for Far Less than Retail

Most Pieces Ship within 2 to 5 Business Days

All Products are Fully Warrantied

Trained Customer and Technical Support

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Bausch + Lomb
Working with Marshall Scientific was overall an enjoyable experience. Their customer service really helped me choose the product that fit my needs, and checking out was easier than I expected. Shipping was faster than expected which was also a plus!
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Nora F. / Sanofi
Working with Marshall Scientific has been an exceptional experience. Their team assisted me in selecting the perfect recirculating chiller for my research needs. Their expertise and guidance were invaluable, and I am grateful for their support. Marshall Scientific has been vital to the success of my research endeavors.
Zara K. / Ford
Collaborating with Marshall Scientific has been a truly exceptional experience. Their fast lead time for centrifuges is unparalleled, and their commitment to quality is evident in every aspect of their service. I would highly recommend them to anyone in need of a reliable and efficient scientific equipment supplier.
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I recently ordered pipettes from Marshall Scientific and was impressed with their great selection and quality. The pipettes were exactly what I needed and worked perfectly. I would definitely order from them again.
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Mayo Clinic
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University of Pennsylvania
I recently purchased a ChemiDoc imaging system from Marshall Scientific and was impressed with the great condition it arrived in. The shipping was professional and the system has been a valuable addition to my scientific research.
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Massachusetts Institute of Technology
The New Brunswick Incubator Shaker that I ordered from Marshall Scientific has just arrived and I cannot say enough how satisfied I am with my purchase. The shaker works like it came straight from the factory and the longer warranty is definitely a plus. I highly recommend Marshall to anyone looking for a company that stands behind their products.
Xiao L. / MIT
Mass General Hospital
My recently purchased microplate reader from Marshall Scientific has been a much needed addition to my lab. The reader is easy to use and provides accurate and reliable results. I have used it for various experiments including ELISA, cell viability assays, and protein quantification. The reader has greatly improved the efficiency and accuracy of my experiments. Thanks again!
Larisa R. / MGH
I purchased a recirculating chiller from Marshall Scientific three months ago and couldn't be happier. The Thermoflex 2500 is a great unit and has been working perfectly. I actually bought three of them and they have exceeded my expectations.
Gavril K. / Tesla
Columbia University
I recently purchased a laboratory freezer from Marshall Scientific and I am very pleased with my purchase. The freezer is of high quality and has been perfect for storing my research samples. I use it mostly for cell culture and protein storage and it seems to do the job just fine. The overall cosmetic condition of the unit is perfect.
Juan M. / Columbia University
I would like to extend a thanks to Kyle on the other side of Marshall Scientific's chat feature to help me select the right product for my laboratory needs. Kyle was knowledgeable and helped me choose the perfect equipment for my application. The chat feature was convenient and saved me time. I would definitely use it again in the future.
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Quest Diagnostics
I recently received a Vicell cell counter from Marshall Scientific and I must say, I was anxious about making such a large purchase over the internet. However, the product arrived in perfect condition and has exceeded my expectations. I use it for various applications in my lab and it has been incredibly accurate and efficient. The professional shipping was also a plus. I will definitely be purchasing from Marshall Scientific again in the future.
Ethan S. / Quest Diagnostics
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