Hydraulic Filter Element – The Core Component of Hydraulic Systems

Aug 4, 2023

Hydraulic filer element is an important component of the hydraulic system used to filter out particles and rubber impurities in the system and ensure the cleanness of the hydraulic system. As a key part of the filter, hydraulic filter element performs filtration and/or dewatering functions in the filter housing.

Hydraulic filter element is composed of pleated filtration layers, support layers and end caps. Support layers are located at the innermost part of the filter element while pleated filtration layers surround support layers, forming a stabilizing support cylinder; Both ends of pleated filtration layers and the support layer are well sealed by end caps. In this way, hydraulic filter element can effectively perform actual filtration function and ensure the smooth operation of the hydraulic system.

Hydraulic filter element structure display
2 pleated hydraulic filter elements are displayed.

Hydraulic filter element

A close shot of the hydraulic filter element end cap

Hydraulic filter element end cap

A vernier caliper is used to check the length of hydraulic filter element pleated layers.

Hydraulic filter element pleated layer

  • High dirt holding capacity
  • High pressure stability and low pressure loss
  • High temperature resistance, sometimes up to 135 °C.
  • Many filter ratings are available for your option including 2–5 μm high precision filtration, 10–15 μm medium precision filtration and 15–25 μm low precision filtration.
  • To compress the finished shape size of hydraulic filter elements and increase the filtration area, filtration layers are generally made into a corrugated shape and the pleat height of the hydraulic filter element is 20 mm below.
  • Hydraulic filter elements generally withstand a pressure difference of 0.35–0.4 MPa. However, some filter elements need to withstand higher pressure difference.
Replacement Cycle

The replacement cycle of hydraulic filter elements depends on many factors, including hydraulic system working conditions, operating conditions, hydraulic oil quality, filter element types and specifications.s

You can replace the filter element based on the working hours of the hydraulic system. Typically, the replacement cycle is every 500 to 1000 hours or every 12 to 18 months.

The mechanical equipment is performing metallurgical operation.

For the filtration of hydraulic systems of rolling machines and continuous casting machines and the filtration of various lubricating equipment

The oil extraction machine is extracting oils.

For the separation and recovery of products and intermediate products in oil refining and chemical production processes, and the filtration of oilfield injection well water and natural gas particles.

The textile machines are working.

For the purification and uniform filtration of polyester melts in the drawing process, protective filtration of air compressors, de-oiling and de-watering of compressed gases.

A picture of thermal power plant
Thermal Power & Nuclear Power

For the purification of oil in lubrication systems, speed control systems, bypass control systems, feed pumps, fans and de-dusting systems in turbines and boilers.

A locomotive is parked on the railway.
Railway Internal Combustion Engine & Electric Generator

For the filtration of lubricating oils and engine oils

The automobile is being checked.
Automobile Engine & Mechanical Equipment

For the air, oil and fuel filtration of internal combustion engines, hydraulic oil, diesel and water filtration of mechanical equipment, ships and trucks.

How to Choose Hydraulic Filter Elements?
  • Selection of filter rating

    We recommend that you observe the components of the hydraulic or lubricating circuits that are most susceptible to contamination and determine the oil cleanliness class, and therefore the filter rating of the entire system. In critical applications, we recommend that you separate the hydraulic and lubricating circuits.

  • Selection of appropriate filter material

    Different element designations, optimized to the respective application, have been generated due to the diversity of application for lubricating and hydraulic filters.

We offer a wide range of filter elements for you to choose from, if you have any question or demand, please feel free to contact us at any time.