What Is Hydraulic Filter And Its Types?

November 28, 2022

A hydraulic filter is an integral part of the entire hydraulic system. It has undergone many innovations to improve its performance and durability. Over time, various improvements have come to this technology so that it is more efficient and effective. Must read: Oil Filtration System

Briefing: Hydraulic Filter, Hydraulic Filter Purpose, and Different Types

Hydraulic filters remove dirt and other impurities from the oil before it enters the system. They also help maintain the quality of the oil by trapping solids that can damage components in the system. The purpose of hydraulic filters is to remove impurities from the hydraulic fluid as it enters or leaves a system. This filtering process can decrease components’ wear or even prevent oil leaks altogether. There are three types of hydraulic filters: oil filters, air filters, and foam filters. Each type has its own advantages over other types regarding removing contaminants from hydraulic fluid: oil filters have heavy-duty materials such as stainless-steel plates or carbon fibre cloth, and air filters use specialized filtration media such as activated carbon particles bound together by resin compounds. Also read: Types of Hydraulic Pumps

What is a Hydraulic Filter?

Hydraulic filters in hydraulic systems remove particulate matter from the hydraulic fluid. They come in different types and configurations, each having unique benefits. Example of the hydraulic filter is Parker hydraulic filter and filter cart.

Purpose of Hydraulic Filters

  • To remove debris from the hydraulic oil system. This can be harmful to the engine or other components of the vehicle. Removing it can help prolong the engine’s life expectancy, prevent wear on critical parts, and increase fuel efficiency by reducing friction in the system.
  • To remove debris from any fluid flowing through a hose or pipe. This includes water, fuel, antifreeze, and engine oil. It may also come in useful as an emergency brake booster when there is not enough pressure in your system for regular brakes to stop properly (such as when you have low air pressure).
These filters also require regular cleaning because they can clog over time and cause operational problems for your car’s engine. In other words, these are the workhorse of oil and hydraulic systems, preventing fine particles from entering the system. They remove particulate matter from the system before it enters the oil, which can cause damage. Also read: Filtering Hydraulic Oil

Types of Hydraulic Filters

The three main types of hydraulic filters are sediment filters, pre-filters, and post-filters:
  1. Sediment filters trap large particles that pass through other types of filters. They do this using a large pore size—they have tiny passages through which water can flow, but not much oil can pass through.
  2. Pre-filters are in addition to sediment filters and other types of filters to trap larger particles before entering the oil system. Also known as bypass filters because they allow larger particles, such as rocks or sandblasting grits, to pass through without being trapped by a sediment filter first.
  3. Post-filters work on top of an existing filter system and catch any remaining contaminants that other types of filters may have missed.
The other three types of hydraulic filters you should know about:

1. Oil Filter

These are the most basic type of filter—made from cardboard or paper- and are at regular intervals along the length of an engine. They work by trapping small bits of dirt and debris in their mesh surfaces so that they can be easily removed by a backwash procedure when required.

2. Oil Filter Changer (OFC)

This is another type of filter that differs from the oil filter because it has no mesh surface. Instead, it has a sponge element that traps particles and absorbs water. It also has two baskets that allow it to be manually changed without removing any other parts from underneath an engine block.

3. Hydraulic Filter Housing (HFP)

The HFP differs slightly from an OFC because it does not have a sponge element but instead has a series of pleats that trap contaminants and absorb water effectively into its pores. This allows for greater flexibility when changing between different types.

Hydraulic Filter Carts & Inline Hydraulic Filters

Hydraulic filter carts move hydraulic fluid from the fluid source to the point of use. The purpose of a hydraulic oil filter cart is to transport the liquid from its source to where it is going to come in use. The fluid may come in use for many different tasks and other forms. An inline hydraulic filter is an assembly that contains all the necessary components needed to move the liquid from one place to another. This assembly mounts on a vehicle, truck, or another form of transportation. It mounts inside some additional equipment, such as a machine or device. The element within an inline hydraulic filter must have specific characteristics, such as size and shape, to function properly within this type of assembly.

Some common uses for hydraulic oil filters include:

  • Oil Filters for Cars – These filters contain sedimentation tanks that trap dirt particles before entering your engine’s block. They work by filtering out harmful debris from your car’s transmission fluid before it enters your car’s engine block and damages it.
  • Engine Oil Filters – These filters remove water from your engine’s oil so that it does not freeze during cold weather or when driving through rough terrain where there is little ground clearance available between you and any objects in front of you.
Also read: Off-line Oil Filtration


Further and last, the main component of the hydraulic filter is a pleated paper filter. The pleated paper filter contains different materials, including cotton or polyester fibres. The pleated paper filters are packed together in a cylindrical shape with a mesh screen on each side. And the pleated paper filters have many small holes per inch (HPI). They can trap particles such as dirt and rust while allowing fuel to pass through them quickly. Most people do not think of their car as a filter, but that is precisely what it is. A hydraulic filter element out oil impurities and ensures your engine can run at peak performance. Hydraulic filters come in three different types: cartridge, pleated, and paper. Cartridge filters are the most common type of hydraulic filter, which consists of a metal housing with a steel mesh media inside. The media is packed tightly together so that it forms a tight seal when the housing is screwed on over top of it. When you first buy your car, it may come with a cartridge type of filter already installed—this is great because you do not have to worry about replacing this part if you ever forget about it! If not, you will have to replace it at some point so that your vehicle will perform, possibly under extreme conditions like cold temperatures or high altitudes (which can cause problems for older cars). Hydraulic oil filters in hydraulic systems run machinery. For example, hydraulic pumps use them to filter debris from the fluid that flows through them. They also filter out particles from the air so that humans and other animals can breathe it. Here we discussed Hydraulic filters, if you need something else then visit our Harvard filtration website. Our Related Products:  Spin on Filter  Portable Filter Carts  

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