| pressure filter, change-over |
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Description:
Duplex pressure filters with change-over valve type HDD are suitable for a working pressure up to 315 bar. The pressure peaks are absorbed by a sufficient margin of safety. Duplex filters can be serviced without interruption of operation. The upper part has a three-way-change-over valve which allows to change-over the flow from the dirty filter-side to the clean filter-side without interrupting the operation. The change-over procedure does not lead to a cross sectional contraction. Prior to the change-over procedure a built-in pressure balance valve equalizes the housing pressure. After change-over the pressure balance valve is to be closed again. The closed filter-side has to be air-bled by vent V respectively by vent VI. Then change filter element. After screw in the filter bowl the pressure balance has to be opened shortly and the just serviced filter-side has to be air-bled. Filter elements are available down to a filter fineness of 4 µm(c). INTERNORMEN-Filter elements are known as elements with a high intrinsic stability and an excellent filtration capability, a high dirt retaining capacity and a long service life. INTERNORMEN-Filter are suitable for all petroleum based fluids, HW-emulsions, most synthetic hydraulic fluids and lubrication oils. INTERNORMEN-Filter elements are available with a pressure difference resistance up to Δp 160 bar and a rupture strength up to Δp 250 bar. The internal valves are integrated into the centering pivot for the filter element. After reaching the opening pressure the by-pass valve causes that an unfiltered partial flow passes the filter. With the reverse valve a protection of the filter element is given when having a reverse flow inside the filter. The reverse flow will not be filtered.
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Instruction manual |
| Technical data: |
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| temperature range: |
- 10 °C to + 80 °C (for a short time + 100 °C) |
| operating medium: |
mineral oil, other media on request |
| max. operating pressure: |
315 bar |
| test pressure: |
410 bar |
| connection system: |
thread connection according to ISO 228 |
| housing material: |
C-steel |
| sealing material: |
Nitrile (NBR) or Viton (FPM), other materials on request |
| installation position: |
vertical |
| air bleeding and mini-measuring connections dirt side: |
G ¼ |
| measuring connections clean side: |
G ¾l |
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Classified under the Pressure Equipment Directive 97/23/EC for mineral oil (fluid group 2), Article 3, Para. 3. Classified under ATEX Directive 94/9/EC according to specific application (see questionnaire sheet-no. 34279-4).
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Data Sheet |
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Brochure |
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Clogging Indicator: |
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visual AOR/AOC
visual-electrical AE
electronical VS1
electronical VS2
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