3520 Series Hydraulic Power Units (HPUs) Additional Options
Each 3520 Series Hydraulic Power Unit (HPU) can be factory-fitted with a number of options to meet specific site conditions.
Acoustic Attenuation System
Designed with the laboratory environment in mind, the 3520 Series HPUs can be positioned close to the testing machine. Through careful selection of components and materials, Instron is able to provide an optional acoustic attenuation package with unsurpassed noise reduction.
With noise levels as low as 58-63 dB (A)*, depending upon the model selected, combined with an internationally supported leak-free guarantee, Instron® advanced noise reduction technology often eliminates the need for a specially-built pump room, providing greater flexibility when locating the Hydraulic Power Unit. The acoustic attenuation system achieves exceptionally low noise specifications while providing ease of maintenance.
*dB (A) is a measurement of the sound pressure level (units Decibel, dB), weighted to suit the normal frequency response of the human ear. It is expressed in free field (open) conditions, and therefore readings may vary within the installed environment.
Remote air-blast cooling units are available for installations where water cooling is not desirable. The cooling units are designed for ambient air temperatures of up to +37° C (+99° F) and are compatible with all 3520 Series HPUs.
Bladder-type pressure accumulators are available to smooth pump ripples and minimize ring main disturbance with rapidly changing system demands.