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    Series
    C2.9512

    Pilot-Operated Check Valves

    without/with pre-release
    manifold-mounting type, max. operating pressure 500 bar
    Pilot-Operated Check Valves
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    Catalogue sheet
    USESFR
    Operating instructions
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    Information Series
    C 2.9512 Pilot-Operated Check Valve

    Pilot-operated check valves are spring-loaded poppet valves with free flow from B to A and blocked flow in the opposite direction that can be “unblocked” by pressurising the control port Z. The minimum pressure required for unblocking depends on the height of the counter pressure at port A.

    In the version with pre-release first a smaller poppet valve located in the main valve piston is opened.

    This offers the following advantages:

    • The control pressure required for opening is considerably lower, and thereby the  use of swing clamps with unfavourable surface ratios is possible.
    • Pressure reduction is effected relatively softly. That saves all hydraulics components and the noise level sinks.
    Products (3)
    type
    manifold-mounting type (3)
    max. operating pressure [bar]
    500 (3)
    max. flow rate [l/min]
    pre-release
    ports A, B
    control port Z
    Ø 3,5 mm (3)
    Item no. CAD datatypemax. operating pressure [bar]max. flow rate [l/min]pre-release
    Item no.
    2951416
    CAD data
    type
    manifold-mounting type
    max. operating pressure [bar]
    500
    max. flow rate [l/min]
    20
    pre-release
    without
    Properties
    Item no.
    2951419
    CAD data
    type
    manifold-mounting type
    max. operating pressure [bar]
    500
    max. flow rate [l/min]
    50
    pre-release
    without
    Properties
    Item no.
    2951420
    CAD data
    type
    manifold-mounting type
    max. operating pressure [bar]
    500
    max. flow rate [l/min]
    50
    pre-release
    with
    Properties
    Item no.
    2951416
    type
    manifold-mounting type
    max. operating pressure [bar]
    500
    max. flow rate [l/min]
    20
    pre-release
    without
    ports A, B
    Ø 5 mm
    control port Z
    Ø 3,5 mm
    Item no.
    2951419
    type
    manifold-mounting type
    max. operating pressure [bar]
    500
    max. flow rate [l/min]
    50
    pre-release
    without
    ports A, B
    Ø 9 mm
    control port Z
    Ø 3,5 mm
    Item no.
    2951420
    type
    manifold-mounting type
    max. operating pressure [bar]
    500
    max. flow rate [l/min]
    50
    pre-release
    with
    ports A, B
    Ø 9 mm
    control port Z
    Ø 3,5 mm
    Accessories (5)
    Item no. CAD data Description
    Item no.
    3000022
    CAD data
    /
    Description
    O-ring 9.19 x 2.62 mm as per data sheet C2.9512
    Item no.
    3000942
    CAD data
    /
    Description
    O-ring 6.07 x 1.78 mm as per data sheet C2.9512
    Item no.
    3000968
    CAD data
    /
    Description
    O-ring 4.47 x 1.78 mm as per data sheet C2.9512
    Item no.
    3300229
    CAD data
    /
    Description
    Socket head cap screw M6 x 40 mm, 8.8, galvanized as per data sheet C2.9512
    Item no.
    3300580
    CAD data
    /
    Description
    Socket head cap screw M4 x 25 mm, 8.8, galvanized as per data sheet C2.9512
    Application examples
    Application example 1
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    Please note: Our CAD data are generally simplified data and primarily reflect the outer contour and connections of the product (see also Terms of use). Please always refer to the relevant catalogue sheet for the exact dimensions with tolerances, in particular the information on mounting holes or attachments such as special clamps.