Donaldson Low-Pressure Filtration

Donaldson low-pressure hydraulic filters are the most commonly used filters in hydraulic circuits. They are typically installed in return lines and are suitable for working pressures up to 150 psi and static pressures up to 300 psi. Spin‑on filters up to 10.3 bar (150 psi): SP15/25 W023 HBK05 SP50/60 SP80/90 SP100/120 TT15/30/60 In‑tank filters up to 13.8 bar (200 psi): WL15 WL16 FIK SRK Combo In‑line cartridge filters up to 10.3 bar (200 psi): HRK10 These filters are used in return lines, reservoir circuits and low-pressure hydraulic systems where reliable contamination control is required.

Donaldson Medium Pressure Filtration

Donaldson DURAMAX medium-pressure filters are among the highest-rated spin-on hydraulic filters available. They are widely used in return‑line and charge‑line positions and are well suited to duplex circuits. Spin‑on filters up to 69 bar (1000 psi): HMK03 HMK04 HNK04 HMK05 HNK05 HMK24 HMK25 In‑line cartridge filters up to 41.4 bar (600 psi): FLK90 FLK110 FLK125 DPK350 W061 HDK06 W041 HFK08 These filters support mobile machinery, industrial power units and medium-pressure hydraulic circuits requiring efficient particulate removal and long service life.

What does Donaldson manufacture?

Donaldson supplies hydraulic filters, filter heads, housings and accessories for low pressure, medium pressure and high pressure applications. Explore Donaldson Products.

Which Donaldson low pressure filters are available?

The low-pressure range includes spin-on filters, in-tank filters and in‑line cartridge filters for return lines and reservoir circuits. Common series include SP15/25, SP50/60, SP80/90, SP100/120, WL15, WL16, FIK, SRK Combo and HRK10. See Donaldson low-pressure filtration.

What are Donaldson medium pressure filters used for?

Medium pressure DURAMAX filters are used in return‑line and charge‑line positions and are suitable for duplex circuits. Popular series include HMK03, HMK04, HMK05, HMK24, HMK25, FLK90, FLK110, FLK125, DPK350, W061, HDK06, W041 and HFK08. Explore Donaldson medium-pressure filtration.

Does Donaldson offer high pressure hydraulic filters?

Yes. Donaldson high-pressure filters protect pumps, motors, cylinders and valves in demanding circuits. Series include HPK02, HPK03, HPK04, HPK05, DPK2400, W350, W440, W451, W620, FPK02 and FPK04. See Donaldson high-pressure filtration.

What filter media does Donaldson use?

Donaldson high pressure filters use SYNTEQ synthetic media, developed for high efficiency liquid filtration and long service life.

Does Donaldson supply hydraulic accessories?

Yes. The range includes filter service indicators, pressure gauges, test points, flanges, reservoir level gauges, sight glasses, breathers, caps, vents, plugs, strainers, diffusers and magnets.

Can Hydraulics Online identify a Donaldson filter?

Yes. We can identify any Donaldson filter from a part number, label, photograph or application details.

Do you supply Donaldson Hydraulics products internationally?

Yes. Hydraulics Online supplies Donaldson filtration products worldwide with full export documentation and technical support.

What if my Donaldson filter is discontinued?

We can cross‑reference discontinued Donaldson filters to current equivalents or suitable alternatives.

Donaldson Hydraulic Filtration

Hydraulics Online Filtration Expertise: Donaldson hydraulic filters, breathers, indicators, spin-ons, cartridges and accessories

Donaldson hydraulic filters have been solving the world's most complex filtration challenges since 1915. Their products protect machinery and components in a vast range of industrial and mobile applications globally.

Today, Donaldson are one of the largest providers of unique filtration technologies and high-quality filters and parts. The company offers contamination control products, filters and capabilities to protect hydraulic machinery and components in hundreds of applications, in both industrial settings and heavy-duty mobile machinery.

Donaldson hydraulic filters and systems reduce a broad range of contaminants to keep sophisticated equipment running smoothly – resulting in efficient systems with superior performance. They provide a wide range of first-fit products comprising low, medium, high-pressure and off-line filtration systems, together with a complete portfolio of aftermarket replacement filters.

The product range includes a complete line of filters and cartridges for low-, medium- and high-pressure applications. Each is also available in a range of media efficiencies to meet specific application requirements.

The product portfolio includes hydraulic filter heads, housings and related accessories for use in suction and in-tank (low-pressure), return lines (medium-pressure) and pressure line (high-pressure) applications. Spin-ons and cartridges are also available in a wide range of filter medias. Additional accessories for hydraulic circuits, lines and reservoirs help to ensure that ISO cleanliness levels are maintained. Meanwhile, Donaldson fluid analysis equipment can help safely extend drain intervals, minimise downtime and extend equipment life.

Donaldson Hydraulic Product Series Overview

Donaldson Hydraulics offers a complete line of low-pressure, medium-pressure and high-pressure hydraulic filters for mobile and industrial systems. The range includes spin‑on filters, in‑tank filters, in‑line cartridge filters, hydraulic filter heads, housings and a wide selection of accessories designed to maintain ISO cleanliness levels and protect critical hydraulic components. Donaldson filtration products are used in construction machinery, agricultural equipment, material handling systems, mining equipment and industrial hydraulic power units.

Below is an overview of the Donaldson hydraulic filtration families supplied by Hydraulics Online, including key series and popular models.

Donaldson low-pressure hydraulic filters are the most commonly used filters in hydraulic circuits. They are typically installed in return lines and are suitable for working pressures up to 150 psi and static pressures up to 300 psi.

Spin‑on filters up to 10.3 bar (150 psi):

In‑tank filters up to 13.8 bar (200 psi):

In‑line cartridge filters up to 10.3 bar (200 psi): HRK10

These filters are used in return lines, reservoir circuits and low-pressure hydraulic systems where reliable contamination control is required.

Donaldson DURAMAX medium-pressure filters are among the highest-rated spin-on hydraulic filters available. They are widely used in return‑line and charge‑line positions and are well suited to duplex circuits.

Spin‑on filters up to 69 bar (1000 psi):

In‑line cartridge filters up to 41.4 bar (600 psi):

These filters support mobile machinery, industrial power units and medium-pressure hydraulic circuits requiring efficient particulate removal and long service life.

Donaldson high-pressure filters protect critical hydraulic components such as pumps, motors, cylinders and valves. All filters use Donaldson SYNTEQ synthetic media for high-efficiency liquid filtration. Working pressures range from 137.9 bar (2000 psi) to 420 bar (6090 psi).

In‑line cartridge filters:

These filters are used in high-pressure work circuits, hydrostatic drives and heavy-duty mobile and industrial hydraulic systems.

Donaldson also supplies a wide range of hydraulic accessories to support system cleanliness and performance, including the following:

Hydraulic filter service indicators
Hydraulic pressure gauges
Test point assemblies
Hydraulic valves
Hydraulic flanges
Reservoir level gauges
Sight glasses
Tank and filler breathers
Caps, vents and plugs
Strainers, diffusers and magnets

These accessories help maintain ISO cleanliness levels, extend oil life and support reliable hydraulic system operation.

Donaldson Product Catalogue

Donaldson High Pressure Filters

Donaldson Low Pressure Filters

Donaldson Medium Pressure Filters

VIEW ALL DONALDSON FILTRATION SOLUTIONS

Hydraulics Online and Donaldson

Hydraulics Online supplies the full range of Donaldson Hydraulics filtration products for mobile and industrial systems. As an independent hydraulic supplier, we provide unbiased technical support and help customers identify the correct Donaldson filter or a suitable alternative for their application. Our offering includes low-pressure, medium-pressure and high-pressure filters, along with in-tank filters, spin-on filters, in-line cartridge filters and a wide selection of Donaldson hydraulic accessories.

You do not need to know the exact Donaldson model. Share whatever information you have and we will identify the correct filter or a suitable equivalent.

We can assist with:

Identifying Donaldson filters from part numbers, labels or photographs
Selecting low-pressure filters for return lines, suction circuits and reservoir filtration
Choosing medium-pressure filters for return‑line and charge‑line protection
Specifying high-pressure filters for critical work circuits and hydrostatic drives
Cross‑referencing older Donaldson units to current equivalents or suitable alternatives
Supporting OEM and engineering projects where Donaldson filtration is required
Supplying complete Donaldson filtration solutions, including filter heads, housings and hydraulic accessories

Hydraulics Online supplies Donaldson products worldwide. We provide full export documentation and technical support and are the only official Export Champion in the UK hydraulics industry. Since 2004, we have supplied customers in more than 130 countries.

Need technical guidance or can’t find the hydraulic equipment you’re looking for? Get in touch – our team will support you.

Donaldson Hydraulics: Frequently Asked Questions

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