LL9DJUU

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LL9DJUU

LL9DJUU
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Item Description
1.1.1, 2.1.1 Seal ring
1.1.2, 1.3, 2.1.2, 2.3,
2.6, 3, 9, 14 O-Ring
1.1.3, 2.1.3 Spring
1.2, 2.2 Mating ring
2.4 Collar
2.5, 16 Drive screw
2.7, 18, 19 Set Screw
4, 10 Gland plate
5, 6, 11 Pin
7 Flow distributor
8, 12 Retaining ring
13 Hexagon bolt
15 Seal sleeve
17 Drive collar
20 Setting device
21 HSH Cap screw


F Flush
LBO Liquid barrier/buffer OUT
LBI Liquid barrier/buffer IN

LL9DJUU

Features

  • API 682 Category 2 and 3, Type A, Arrangement 2 and 3 seal
  • Dual seal in face-to-back arrangement
  • Same size of inboard and outboard seal
  • Balanced
  • Cartridge unit
  • Stationary multiple springs
  • Solid seal faces

Advantages

  • Suitable for higher speeds
  • Good followability due to no influence from run-out, squareness or vibration of the shaft
  • Compact design
  • Low heat generation and power consumption due to narrow seal face width
  • Longer seal life
  • Pressure-balanced design prevents mating ring being forced out under reverse pressure
  • No damage to shaft sleeve as dynamic
    O-Ring is not in direct contact with the sleeve

Operating range

Shaft diameter: d1 = 20 ... 110 mm (0.79" ... 4.33")
Pressure: p = 60 bar (870 PSI)
Temperature: -40 °C … +176 °C (-40 °F … +349 °F)*
Sliding velocity: vg = 50 m/s (164 ft/s)


* Engineered up to 260 °C (500 °F) with FFKM (K) secondary seals.

Materials

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)

Standards and approvals

  • API 682 / ISO 21049
  • API 682 4th ed. Cat. 2/3 - 2CW-CW
  • API 682 4th ed. Cat. 2/3 - 3CW-FB

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