% $-2,173.00
25VQ series-Fixed size Vane Pumps-25VQ12AF-1C20L-JA
25VQ series-Fixed size Vane Pumps-25VQ12AF-1C20L-JA
TOKYO KEIKI

25VQ series-Fixed size Vane Pumps-25VQ12AF-1C20L-JA

Product SKU: 48218991
Model #: 25VQ12AF-1C20L-JA
Installation and Pump-Prime Mover Alignment — The base for the electric motor and pump should offer sufficient rig...
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  • Description

  • Installation and Pump-Prime Mover Alignment

    — The base for the electric motor and pump should offer
    sufficient rigidity. Vibration absorbing construction is
    recom1212mended.
    — Flexible type coupling is recommended to join the drive
    shaft of the prime mover and the pump shaft. (DO NOT
    USE tire shaped coupling) Shafts should be aligned within
    recommended TIR (Total Indicator Reading) 0.05 mm
    tolerance. However this may be affected by differences in
    connection methods and type of couplings. Please consult
    Tokyo Keiki in such case.
    — Poor shaft alignment may cause shaft damage, heat and
    friction of bearings, leakage from oil seals, pump noise
    and vibration, etc. Thus shaft should be aligned with care.
    — In principle, there should be no external radial or thrust loads
    on shaft ends. Please consult Tokyo Keiki if belt, chain, or
    gear couplings are to be used.

    Piping and Filtration


    — Suction pressure (gauge pressure)
    Proper inlet suction pressures are +35~-16.7 kPa for
    mineral oil fluids and +35~-10.1 kPa for water glycol and
    phosphate ester fluids.
    — Suction pipe flow rate should be kept within 0.5~1.5 m/s.
    — Filtration
    On the suction side, a 150 µm or equivalent tank filter
    (suction filter) should be used.
    On the delivery side, a full flow filter which provides
    filtration of less than 25 µm or bypass filter which
    provides filtration of less than 10 µm should be installed.
    — Filter installation
    When using an immersion type tank filter, please install
    filter so it is about 50~70 mm from the tank bottom to
    discourage ingress of contaminant precipitate. In the
    case of greatly fluctuating oil level, the installation should
    be designed so that air does not enter the filter.
    — Suction, return piping
    Stipulated suction pressure should be considered and
    suction resistance should be kept as low as possible.
    1. Use large diameter pipe with as few bends as
    possible.
    2. Height from pump suction port to tank standard oil
    level should be less than 1 m.
    Distance from suction piping end to tank bottom
    should be more than 50 mm.
    Air in system causes noise, vibration, and parts
    damage. As air can easily be drawn in through suction
    piping, care should be paid to ensure that joints,
    especially, are airtight.
    The end of the return pipe should always be below the
    oil level regardless of fluctuations in oil level.
    A baffle should be installed in the tank between the
    suction and return lines.
    Use of flexible rubber hose piping instead of steel
    piping for pump suction, delivery, and drain lines
    provides effective vibration dampening and reduces
    noise.

    Air bleed


    — During initial system startup (and startups after long period
    of storage), pump may have difficulty drawing fluid. By
    pre-installing an air bleed valve (ABT-03) or by loosening a
    fitting in the delivery pipe, air can be bled from the system.
    — During air bleed of pump and piping, pump should be run
    at no load.

    Warm up


    — During startup, if viscosity is higher than proper viscosity
    (54 mm2/s), system should be warmed up with pressure
    less than half of maximum working pressure until
    viscosity falls below 54 mm2/s.

    Hydraulic fluid


    — Note that pump specifications such as maximum working
    pressure and maximum speed may differ with the type of
    hydraulic fluid used. See Appendix 1 regarding hydraulic
    fluid selection.
    — Mineral oil based fluid
    General industrial anti-wear hydraulic fluid is
    recommended.
    — Fire resistant fluids
    Water glycols may be used with Tokyo Keiki standard
    type pumps. However maximum working pressures,
    maximum speeds, etc., specifications will differ from
    those of mineral oil based fluids.
    Please refer to specifications of each pump for details.
    Fluorine seals are used with pumps that operate on
    phosphate ester fluids. An "F3-" suffix is used to
    designate such pumps. Specifications for maximum
    working pressures, maximum speeds, etc., will differ
    from those of mineral oil fluids.
    Please refer to specifications of each pump for details.
    Please consult Tokyo Keiki regarding other fire resistant
    fluids.

    Hydraulic fluid viscosity and temperature


    — Pump should be operated with hydraulic fluid viscosity
    range of 13 ~ 54 mm2/s. At pump startup a maximum
    viscosity of 860 mm2/s is allowed however care should be
    paid to observe the section 'Warm Up' regarding warm up
    of hydraulic fluid.
    — Hydraulic fluid temperature should be maintained below
    65°C.

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