KNF Low Pulsation Pumps Featured at PRINTING United Digital Experience

KNF pumps can satisify your smooth flow and low pulsation requirements, especially when dealing with sensitve media and system efficiencies.  The PRINTING United Digital Experience featured some inkjet industry experts speaking about trending issues and topics.  The KNF demo presentation is available here for on-demand viewing.

KNF Smoothflow Pump On-Demand Presentation

Looking for Laboratory Liquid Transfer Pumps?

KNF manufactures liquid transfer pumps for benchtop laboratory use, offering similar options for chemical resistance and performance optimization. 

Find out more about the KNF LIQUIPORT series

Liquid Diaphragm Pumps For Smooth Flow

The design of KNF multi-head and multiple diaphragm fluid pumps delivers flow rates from 5 mL/min to over 12 L/min. Plus, KNF boxer-style, NFB liquid pumps feature two modes of operation, each offering cost-savings potential. In parallel mode, the alternating pump head operation results in a smooth, even flow of media -- important for systems sensitive to pulsation. In individual mode, these pumps can transfer two different liquids simultaneously, thereby eliminating the need for a second pump.

Custom Liquid Diaphragm Pumps

Compact, multi-head and multiple diaphragm liquid transfer pumps feature two or more pump heads driven by one motor with adjustable flow rates, and plenty of pump customization options.
Driven by an adjustable speed, brushless DC motor; fluid flow rates can be regulated and matched to the parameters in the customer's pump system. Optimize a KNF liquid pump to your OEM performance needs, with spec-driven configurations, materials, and motors available through our engineer-to-engineer project pump process.
Learn more about custom solutions available at KNF

Contact KNF Sales about Custom Solutions

Low Pulsation Pump Overview

Features & Benefits of Low-Pulsation Pumps

Smooth Flow Pump Applications

KNF FP, FK and NFB pumps significantly reduce pulsation compared to typical single-headed pumps, making them a valid replacement for gear pumps
KNF specializes in tailor-made solutions which allows us to focus on the features and benefits that are most important to you. Contact us today to learn more about all available options.
KNF multi-head and multiple diaphragm pumps offer high flow rates in a compact size, providing great installation and application flexibility. Learn more about KNF pump applications here
FP Series

Our lowest pulsation products
Flow rates up to 5 L/min

FK Series

KNF's highest flow products
Over 12 L/min liquid flow rate

NFB Series

Two pump heads in parallel controlled by one motor
Flow rates from <5 mL/min up to 1.3 L/min per head


External Pulsation Dampeners for further reduction
Pressure Control Valves


High Size/Performance Ratio


Very Long Life
No maintenance required
Self priming and can run dry


Versions available for agressive media
NSF certified options for food grade requirements


Excellent linearity 
High IP options available

Inkjet Printing

UV, water-based, and solvent ink recirculation to prevent pigment settling
Ink temperature management
Glaze, varnish, binder and hot-melt recirculation.


Temperature management
Aesthetic laser cooling systems

Analytical Instruments

Precise and flexible transfer of reagents with excellent linearity and turn down ratio.
Delivering solvents during sample preparation.
Dispensing cleaning agents for needle washing.

Two Pumps in One

NFB pumps can replace two single-headed pumps by offering two flow paths operated by just one motor, saving space and cost.

FP 150 Low Pulsation Pump

Low pulsation is a key feature of the FP 150 since it achieves values lower than 150 mbar (at the pump outlet) at nominal flow rate and lower still depending on system configuration and running speed. In this respect the FP 150 fares just as well as gear pumps used in Inkjet Printing.

Flow Rate (max.): 1.5 l/min
Operating Pressure (max.): 29 psig / 2 bar (rel)
max. Suction height: 7.82 inHg / 2.7 mH₂O

FP 150

FP 400 Low Pulsation Pump

The FP 400 is a next-generation diaphragm pump from KNF. It combines the traditional advantages of diaphragm pump technology — self priming, the ability to run dry, and long, maintenance-free lifetime under continuous-operation conditions — with a pulsation level comparable to gear pumps.

Flow Rate (max.): 4.6 l/min
Operating Pressure (max.): 14.5 psig / 1 bar (rel)
max. Suction height: 8.68 inHg / 3 mH₂O

FP 400

FK 1100 / FK 1.1100 Smooth Flow Liquid Pump

The FK 1100 has only one inlet and one outlet, despite having three diaphragms. These are offset by 120° from each other while connected in parallel, resulting in very low pulsation and minimal shear forces. Intensive testing has proven that the pump easily achieves pulsation values below 200 mbar at the inlet and outlet. This gentle conveyance spares fragile system components and media elements from potential damage.
- Flow Rate (max.): 12.4 l/min
- Operating Pressure (max.): 87 psig / 6 bar (rel)
- Max. Suction height: 13 inHg / 4.5 mH₂O

FK 1100 Standard Series Details Page


EXPROOF VERSION: The UFK 1.1100 KT.27 I EX liquid pump with an explosion proof motor is capable of achieving 11.5 l/min of smooth and continuous flow due to a unique 3-diaphragm system. Find out more about the solvent transfer capabilities of the FK 1.110 exproof liquid pump.

Do you need an explosion proof liquid pump? KNF offers exproof liquid pumps for use in hazardous locations.  Find out more about these exproof liquid pumps.

Contact KNF Sales

Advantages of the Boxer-Style Liquid Transfer Pumps

Designed for high fluid flow rates in a very compact size

NFB Product Series: Boxer Style Pumps

NFB Product Series: Boxer Style Pumps

NFB liquid pumps can be configured to transfer two different fluids simultaneously - saving space and money.
These models are designed as transfer pumps to produce high fluid flow rates in a very compact size - perfect for portable device applications.

The lowest flow liquid pump KNF offers is the NFB 5
Flow Rate: as low as 5 ml/min per head or up to 80 ml/min max total
Operating Pressure (max.): 14.5 psig / 1 bar g
Suction height (max.): 8.68 inHg / 3 mH₂O 

NFB 5 Liquid Pump

NFB 100

With the addition of the NFB 100 separation plate you can transfer 2.6 LPM or 1.3 LPM per head, keeping all your liquids separate from the electronics.  This accessory is ideal for preventing any splashing or aggressive media from contacting the motor during disconnection.

Flow Rate (max.): 2.6 l/min
Operating Pressure (max.): 14.5 psig / 1 bar (rel)
max. Suction height: 8.68 inHg / 3 mH₂O

NFB 100

Multiple Diaphragm Liquid Pumps

The design of KNF multi-head and multiple diaphragm fluid pumps delivers flow rates from 5 mL/min to over 12 L/min.

KNF Multi-Head Liquid Diaphragm Pumps

Our sophisticated modular system enables our engineers to optimize each diaphragm pump precisely to their application requirements.