Hydraulic filters
that protect your
entire system.
Suction, return line and pressure line hydraulic filters and replacement elements — sized to your system flow rate, operating pressure and ISO cleanliness target. Correct filtration is the single most effective way to extend hydraulic component life.
The lowest-cost
investment in
component life.
Contamination — particulate, water and air — is responsible for more than 70% of hydraulic system failures. Correct filtration, matched to the system pressure, flow rate and cleanliness target of the most sensitive component, is the single most cost-effective maintenance investment in any hydraulic installation.
Because Fluidline designs and builds complete hydraulic power packs and systems, we approach filter selection with real application knowledge. We know which micron rating a servo valve circuit demands, where in the circuit the filter must be placed for maximum protection, and what bypass valve rating is appropriate for the system pressure. We supply filter housings and replacement elements that are actually correct for the system — not just the cheapest item on a distributor shelf.
We supply suction strainers, return line filters, pressure line filters and off-line kidney-loop filters, along with replacement elements in all standard micron grades. OEM-equivalent elements for Parker, Hydac, Mahle and Internormen housings are available.
Technical
range overview.
Specifications below represent the range we routinely supply across suction, return and pressure line configurations.
| Filter types | Suction strainers (tank-mount), return line filters (tank-top and in-line), pressure line filters (in-line high pressure), off-line kidney-loop filters, duplex (changeover) filters |
|---|---|
| Micron ratings | 3 µm, 5 µm, 10 µm, 25 µm, 40 µm absolute (glass fibre media); 60–150 µm (wire mesh suction strainers) |
| Beta ratio (typical) | β3 ≥ 200, β5 ≥ 200, β10 ≥ 200, β25 ≥ 200 (ISO 16889 multipass test) |
| Flow capacity | Suction: up to 500 lpm; Return line: up to 400 lpm; Pressure line: up to 250 lpm |
| Pressure rating (housing) | Suction/return: up to 25 bar; Pressure line: up to 420 bar (model dependent) |
| Bypass valve setting | 3.5 bar, 5 bar, 6 bar standard; custom settings on request |
| Differential pressure indicator | Visual pop-up (manual reset), visual with electrical switch (NO/NC), differential pressure gauge — all user-selectable |
| Element media | Glass fibre (standard), cellulose, stainless steel wire mesh; water-absorbing elements available |
| Port sizes | 3/4" BSP to 2" BSP; SAE flange on high-flow and high-pressure models |
| Fluid compatibility | Mineral oil (standard), water-glycol HFC, phosphate ester HFDR (selected elements) |
| Operating temperature | –20°C to +100°C (standard NBR seals); –20°C to +120°C (Viton seals) |
| Element brands / equivalents | Parker, Hydac, Mahle, Internormen, Rexroth — OEM-equivalent elements available |
Three line positions
for complete
system protection.
Suction Strainers
Wire mesh strainers installed on the pump suction port or inside the reservoir. Protect the pump from large particles and assembly debris. Typical mesh: 60–150 µm. Pressure drop must be kept below 0.1 bar to prevent pump cavitation — correct sizing is critical.
Return Line Filters
The primary system protection filter, installed on the return line before oil re-enters the reservoir. Removes wear particles generated in actuators, motors and valves. Available in tank-top (spin-on), in-line and duplex changeover configurations. 10–25 µm for general systems.
Pressure Line Filters
High-pressure in-line filters installed upstream of sensitive components — servo valves, proportional valves, precision cylinders. Rated to system working pressure (up to 420 bar). Essential for servo-hydraulic and proportional control systems requiring ISO 4406 cleanliness of 15/13/10 or better.
Systems and
industries we serve.
More than a
distributor.
System-Level Sizing
We size filters to the actual flow rate, operating viscosity and cleanliness requirement of your system — not to a generic stock size. Correct sizing prevents cavitation, minimises pressure drop and extends element life.
OEM-Equivalent Elements
Replacement elements for Parker, Hydac, Mahle and Internormen housings available from stock. Same media grade, same bypass setting, same dimensions — at competitive prices without compromising on filtration performance.
Built Into Our Power Packs
Every power pack we design and build includes correctly specified filtration as standard. We do not add filters as an afterthought. Suction strainers, return line filters and pressure filters are engineered into the circuit from the start.
Common
questions.
What micron rating do I need for my hydraulic system?
How often should hydraulic filters be changed?
Can you supply OEM-equivalent replacement filter elements?
How do I calculate the pressure drop across a hydraulic filter?
What types of differential pressure indicators are available?
What is beta ratio and why does it matter?
Protect your
system with the
right filter.
Share your system flow rate, operating pressure, fluid viscosity and the most sensitive component in the circuit. Our team will specify the correct filter type, micron rating and element — and quote within 24 hours.