Data Sheet

Gear Pump
shhark® Low NoiseIn the mobile market, the requirement for low noisecabs is increasing for a variety of reasons:• Noise regulations are becoming more demanding••

all over the globe to protect operator health andcomfort
Noise emitted is one of the key buying factors for
end-users
Electrification trend: as drivetrains in general get
quieter, the noise emitted by gear pumps becomes
more noticeable

Apart from the combustion engine and fan drive
system, the steering pump is the most importantsource of noise in the cab. Low noise gear pumps arebecoming an important tool for achieving operator
noise requirements in off-highway mobile
application. shhark® is the answer of Danfoss to thisrequirement.
Features®

The gears of the shhark pump are covered®
by multiple Danfoss patents. shhark
innovative technology has almost twice
the number of teeth of a standard gearpump of the same frame size and it has®
also a small helix angle, so that shhark
pumps are able to do the following:• reduce the flow pulsation by a stunning78%• reduce the noise emissions by up to 10••dB(A) on average compared to standard
gear pumps
produce better sound quality than dual
contact flank gear pump technologies
because the frequency of noise
emission is lower‒ The human ear is more sensitive tonoise emitted at high frequencies,
therefore the lower the noise
frequency, the higher the soundqualityachieve low noise and efficiency
performance even after thousands of© Danfoss | April 2021••

hours of heavy duty operation in thefieldachieve higher efficiency than astandard gear pump due to a higher
number of sealing teeth
for the same external dimensions,®
shhark pumps have a higher, moreconsistent output flow than a standard
gear pump due to a higher average flowby 2.7%

5. For electric mobile machines, the noise
emitted by the steering gear pump
becomes more noticeable than fordiesel engine machines, thusincreasing the need for low noise gear
pumps → suitable for electricmachines

Comprehensive technical literature isonline at www.danfoss.com

Advantages
1. Higher sound quality than other low
noise gear pump technologies →
better comfort for the operator
2. Cost, weight and bulk savings byeliminating secondary noise reduction
measures→ cost saving
3. Helps meet legal NVH (noise, vibration,harshness) requirements → noise
regulation compliance
4. Drop in compatibility with all Danfoss
external gear pumps → compactness
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Noise level @ 3000 rpm 50˚CSound pressure [dB(A)]

Typical applications

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Tractors
Wheel loaders
Forklifts
Telehandlers
Indoor lift trucks
Aerial work platforms
Waste compactors
Combines and harvesters
Cab equipped mobile machines
Hydraulic steering systems
Hydraulic power packs

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

2 | © Danfoss | April 2021

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