The Fluid Kinetics Hydraulic Acoustic Filter is designed to reduce by 15 to 20 dB noise and pulsation emanating from high speed hydraulic pumps. It offers a simple maintenance-free way to meet existing OSHA workplace standards for hydraulic systems in machine tool, hydraulic press, forging and test stand applications.

Typically, the Hydraulic Acoustic Filter is installed at the outlet of multi- (7 or more) piston, vane or gear type pumps in hydraulic systems. It is designed to block fluid-borne noise and pulsation from entering the connected piping. To prevent noise radiation from the pump and motor casing, a commercially available acoustic shroud should be used. This combination treatment is necessary only if there is a requirement to quiet the immediate environment of the hydraulic package. The Hydraulic Acoustic Filter effectively reduces all downstream piping noise.

DESIGN    

The multichambered acoustic filter act analogously to an electrical filter network. It is designed to filter or attenuate the predominate frequency and significant harmonics of the pump. This reactive type of filter does not require resistance or pressure drop to function. However, since there is flow through the filter some pressure drop is imposed. Filter overall size is an inverse function of pressure drop. A computer simulation response curve allows Fluid Kinetics engineers to check the selected AFC performance for each application.

CONSTRUCTION  

The Hydraulic Acoustic Filter is of all carbon steel construction with no bladder to fill or replace. Working pressure up to 5000 psig are standard. Higher pressures and stainless steel materials are available upon request.

Download the catalog sheet in PDF format (211 KB)