• API 682 4th Edition

B750VK Dual Seal

  • API 682 Category 2 and 3, Type A, Arrangement 2 & 3 seal
  • Dual seal in face-to-back configuration
  • Balanced design
  • Independent of direction of rotation
  • Cartridge construction
  • Pumping device available for increased efficiency in circulation
  • Rotary unit with multiple springs
  • Can accommodate reverse pressure

Details

  • 1.1.1,2.1.1

    Seal ring

  • 1.1.2,2.1.2

    Driver

  • 1.1.3,2.1.3

    Thrust ring

  • 1.1.4,1.3,2.1.4,2.3,4,6,10

    O-ring

  • 1.1.5,2.1.5

    Spring sleeve

  • 1.1.6,2.1.6,13

    Spring

  • 1.1.7,17

    Set screw

  • 1.2,2.2

    Mating ring

  • 3

    Shaft sleeve

  • 5

    Key

  • 7

    Intermediate gland

  • 7,14

    Washer

  • 9

    Retaining ring

  • 11

    Gland

  • 12

    Throttle bushing

  • 15,19

    Hexagonal screw

  • 16

    Set ring

  • 18

    Setting Plate

  • 20

    HSH cap screw

  • 21

    Head screw plug

  • F

    Flush

  • LBI

    Liquid Buffer / Barrier IN

  • LBO

    Liquid Buffer / Barrier OUT

  • Q

    Quench

  • D

    Drain

  • Can handle extensive applications in various temperatures and pressures
  • Versatile in design to fit various seal chambers
  • Material of construction available in special metallurgy
  • Special torque transmission design for high performance
  • Operation reliability due to rugged metal torque transmission at the rotating seal face
  • API 610/ISO 13709 pumps
  • Oil and gas industry
  • Refining technology
  • Petrochemical industry
  • Chemical industry
  • Highly volatile hydrocarbons
  • LPG plants
  • Power plant technology
  • Process pumps
  • Seal rings: Blister resistant carbon, Silicon carbide SSiC (Q1), RBSiC (Q2)
  • Mating rings: Silicon carbide SSiC (Q1), RBSiC (Q2)
  • Secondary seals: EPDM (E), NBR (P), FKM (V), FFKM (K)
  • Springs: Hastelloy ® C-276 (M5)
  • Metal parts: CrNiMo steel 316 (G), Duplex (G1), Hastelloy C-276 (M5)
  • Shaft diameter:
    d = 20 … 110 mm (0.79″ … 4.33″)
  • Pressure:
    p1 = 42 bar (609 PSI)
  • Temperature:
    t = –40 °C … +176 °C (+220 °C) (-40 °F … +349 °F (+428 °F))*
  • Sliding velocity:
    vg = 23m/s (76 ft/s)
  • Axial movement:
    d ≤40 mm ±1.0 mm
    d >40 mm ±1.5 mm
    * Engineered up to 260 °C (500 °F) with FFKM (K) secondary seals
  • Recommended piping plans 2CW-CW
    Process side:
    01, 02, 03, 11, 12, 13, 14, 21, 22, 23, 31, 32, 41
    Between Seals: 52, 55
    Atmospheric side: 61, 62, 65A, 65B
  • Recommended piping plans 3CW-FB
    Process side:
    01, 02, 03, 11, 12, 13, 14, 21, 22, 23, 31, 32, 41
    Between Seals: 53A, 53B, 53C, 54 Atmospheric side: 61, 62, 65A, 65B

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