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Low Pressure Duplex Filter  Pi 210
Nominal pressure 25/63 bar (360/900 psi), nominal size up to 450
1. Features
High performance filters for modern hydraulic systems
  • Modular system
  • Compact design
  • Minimal pressure drop through optimal flow design
  • Visual/electrical/electronic maintenance indicator
  • Threaded connections
  • Change over valve on upstream side
  • Ergonomic switch-over handle with safety lock and pressure compensation
  • User-optimized one-hand-operation
  • Equipped with highly efficient glass fibre PS filter elements
  • Beta rated elements according to ISO 16889 multipass test
  • Elements with high differential pressure stability and dirt holding capacity
  • NPT- and SAE-connections on request
  • Worldwide distribution
  • 2. Flow rate/pressure drop curve complete filter

    y = differential pressure Δp [bar]
    x = flow rate V [l/min]

    3. Separation grade characteristics 4. Filter performance data

    y=beta-value
    x=particle size [µm]

    determined by multipass tests (ISO 16889)
    calibration according to ISO 11171 (NIST)

    tested according to ISO 16889 (multipass test)

    PS elements with PS vst elements with
    max. Δp 20 bar

    max. Δp 210 bar

    PS    3     5(c)    ≥200 PS vst    3     5(c)    ≥200
    PS    6     7(c)    ≥200 PS vst    6     7(c)    ≥200
    PS    10   10(c)   ≥200 PS vst    10   10(c)   ≥200
    PS    25   20(c)   ≥200 PS vst    25   20(c)   ≥200
    Values guaranteed up to
    10 bar differential pressure
    Values guaranteed up to
    20 bar differential pressure
    5. Quality assurance
    MAHLE filters and filter elements are produced according to the following international standards:
    6. Symbols
    7. Order numbers

    8. Technical specifications
    Design: line mounting filter
    Nominal pressure: Pi 2115 - Pi 2145 25 bar (360 psi)
    Pi 2105 - Pi 2111 63 bar (900 psi)
    Test pressure: Pi 2115 - Pi 2145 33 bar (470 psi)
    Pi 2105 - Pi 2111 82 bar (1170 psi)
    Temperature range: -10 C to +120 C
    (other temperature ranges on request)
    Bypass setting: Δp 3.5 bar 10 %
    Filter head material: GAL
    Filter housing material: AL/St
    Sealing material: NBR/AL
    Maintenance indicator setting: Δp 2.2 bar 10 %
    Electrical data of maintenance indicator:
    Maximum voltage: 250 V AC/200 V DC
    Maximum current: 1 A
    Contact load: 70 W
    Type of protection: IP 65 in inserted and
    secured status
    Contact: normally open/closed
    Cable sleave: M20x1.5

    The switching function can be changed by turning the electric upper part by 180 (normally closed contact or normally open contact). The state on delivery is a normally closed contact. By inductivity in the direct current circuit the use of suitable protection circuit should be considered. Further maintenance indicator details and designs are available in the maintenance indicator data sheet.

    We draw attention to the fact that all values indicated are average values which do not always occur in specific cases of application. Our products are continually being further developed. Values, dimensions and weights can change as a result of this. Our specialized department will be pleased to offer you advice.

    We recommend you to contact us concerning applications of our filters in areas governed by the EU Directive 94/9 EC (ATEX 95). The standard version can be used for liquids based on mineral oil (corresponding to the fluids in Group 2 of Directive 97/23 EC Article 9). If you consider to use other fluids please contact us for additional support.

    * Subject to technical alteration without prior notice.

    9. Dimensions
    10. Installation, operating and maintenance instructions
    10.1 Filter installation
    When installing the filter make sure that sufficient space is available to remove filter element and filter housing. Preferably the filter should be installed with the filter housing pointing downwards. The maintenance indicator must be visible.
    10.2 Connecting the electrical maintenance indicator The electrical indicator is connected via a 2-pole appliance plug according to DlN EN 175301-803 with poles marked 1 and 2. The electrical section can be inverted to change from normally open position to normally closed position or vice versa.
    10.3 When should the filter element be replaced?
    1. Filters equipped with visual and electrical maintenance indicator: During cold starts, the indicator may give a warning signal. Press the red button of the visual indicator once again only after operating temperature has been reached. lf the red button immediately pops up again and/or the electrical signal has not switched off after reaching operating temperature, the filter element must be replaced after the end of the shift.
    2. Please always ensure that you have original MAHLE spare elements in stock: Disposable elements (PS) cannot be cleaned.
    10.4. Element replacement
    Note: The maintenance indicator monitors the filter side in operation, which is identified by the position of the switching lever catch. The flow transfer valve must be switched prior to filter servicing. Now the signal of the maintenance indicator is cancelled and the red button can be depressed again.
    1. Operate and hold pressure equalizing lever located in the switching lever. Swivel switching lever. Engage the catch. Place through or drip pan underneath to collect leaking oil.
    2.Loosen vent screw of the filter side not in use by 2-3 turns; maximum back out against safety stop.
    3. Unscrew filter bowl by rotating same counter clockwise and clean with a suitable medium.
    4. Remove filter element with a side-to-side motion.
    5. Check o-ring on the filter housing and the spigot for damage. Replace, if necessary.
    6. Make sure that the order number on the spare element corresponds to the order number of the filter name-plate. Remove the plastic bag and push element over the spigot in the filter head.
    7. Complete installation by screwing on the housing, turning clockwise until it comes to a full stop. Back off the housing 1/8 to 1/2 turn.
    8. To refill the filter chamber, operate only the pressure equalizing lever long enough for the medium to emerge bubblefree from the vent bore. Tighten vent screw. Check filter for leaks by operating the pressure equalizing lever once again.
    11. Spare parts list