Product Size

Height: 229mm
Inner diameter: 33mm
Outer diameter: 60mm

Cross reference

DEMAG: 42059012
DEUTZ: 04439586
DEUTZ: 4439586
GROVE: 9.437.100593
HUSQVARNA MOTORCYCLE: 5101445-01
JCB: 00/417906
JCB: 32/910100
JCB: 32/913500
JCB: 32/925346
YANMAR: 172194-73700
YANMAR: 172194-73710
BALDWIN: PT 23103 MPG
BALDWIN: PT 8484
COOPERS: HEM 6194
FLEETGUARD: HF 28948
HIFI FILTER: SH 74016
IMPREFIL: IH 1394
IMPREFIL: IH 1395
KALMAR-IRON: CTT 00001818
LUBERFINER: LH 4199
MANN-FILTER: HD 419
MANN-FILTER: HD 419/1
UNIFLUX FILTERS: XH 297
WIX FILTERS: W 01 AG 255
WOODGATE: WGH 9163

Working principle of hydraulic oil filter

There are many ways to collect contaminants in fluids. An appliance made of filter materials that traps contaminants is called a filter. Magnetic materials are used to adsorb magnetic contaminants called magnetic filters. In addition, there are electrostatic filters, separate filters, etc. In the hydraulic system, all the contaminant particles collected in the fluid are called hydraulic filters.

At present, the most widely used hydraulic filter is not only the method of using porous materials or winding fine gaps to intercept pollutants, but also magnetic filters and electrostatic filters are used in hydraulic systems.

The function of the hydraulic filter is to filter various impurities in the hydraulic system.

The main sources are: mechanical impurities remaining in the hydraulic system after cleaning, such as scale, casting sand, welding slag, iron filings, paint, paint and cotton yarn scraps, etc., and impurities that enter the hydraulic system from outside, such as through the fuel filler and Dust that enters the dust ring, etc.; impurities generated during the working process, such as the fragments formed by the hydraulic action of the seal, the metal powder generated by the relative wear of the movement, the gum, asphaltene, carbon residue, etc. generated by the oil due to oxidative deterioration .

After the above-mentioned impurities are mixed into the hydraulic oil, with the circulation of the hydraulic oil, it will cause damage everywhere, which will seriously affect the normal operation of the hydraulic system, such as the small gap (in μm) between the relatively moving parts in the hydraulic components and the joints. Flow small holes and gaps are stuck or blocked; damage the oil film between relative moving parts, scratch the surface of the gap, increase internal leakage, reduce efficiency, increase heat generation, aggravate the chemical action of the oil, and make the oil deteriorate. According to production statistics, more than 75% of the faults in the hydraulic system are caused by impurities mixed in the hydraulic oil. Therefore, maintaining the cleanliness of the oil and preventing the contamination of the oil are very important for the hydraulic system.

The general hydraulic filter is mainly composed of a filter element (or filter screen) and a shell (or skeleton). Numerous tiny gaps or pores on the filter element constitute the flow area of ​​the oil. Therefore, when the size of the impurities mixed in the oil is larger than these tiny gaps or pores, they are blocked and filtered out of the oil.

Because different hydraulic systems have different requirements, it is impossible to completely filter the impurities mixed into the oil, and sometimes it is not necessary to be demanding.