Servo and proportional valves sticking
Silt below the 25 µm inline rating circulates until it lodges in a clearance.
Hydraulic Manufacturing
Hydraulic oil filtration for presses, moulding and rolling
Most reservoirs we test are several ISO codes dirtier than their valves need.
What goes wrong
Element life falling
Inline filters that need changing early mean the bulk oil is too dirty.
Moisture from the shop floor
Humidity, wash downs and breathing cylinder rods put water in the oil.
Dirt built in at commissioning
New systems arrive with weld scale and pipe dope unless flushed properly.
The cost of downtime
The real cost is the lost production hour, plus rejects made before the drift was caught.
The business caseWhat we fit
Sizing follows from the cleanliness code your valves need and the reservoir volume.
Fine filter, tank mounted
3 µm absolute depth filtration cleaning the tank six to ten times a day.
Filter separator for heavy water
Drops free water out and filters the oil in the same pass.
Desiccant breathers
A low cost fit that stops most moisture and dust at the vent.
Project Profile
Injection moulding hydraulics, 1,500 L
ISO 21/19/16 against a 17/15/12 valve requirement reached 16/14/11 in a fortnight. Element life went from five weeks back to six months.
A typical project: customer not named, figures indicative. Verified site data available on request.
Case studies
Before
After
Common questions
Does the offline unit interfere with machine hydraulics?
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No. It draws from and returns to the reservoir; pressure, flow and response are untouched.
What ISO 4406 code should I be aiming for?
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Use what your valve and pump makers specify, often 16/14/11 for servo valves; otherwise 17/15/12 suits most systems.
Why is oil that is only two months old already contaminated?
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New oil from the drum is often ISO 20/18/15 or worse. Filter it on the way in.
Technical Enquiry
Request a hydraulic system assessment
Send reservoir volume, oil grade and the valve cleanliness specification. Sizing and price follow within one working day.
- We reply within one working day.
- We size the unit for your tank and oil, not from a catalogue.