LL9DJUE
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LL9DJUE

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LL9DJUE
LL9DJUE
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Technical drawing of LL9DJUE

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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, 17 O-Ring
1.1.3, 2.1.4 Spring
1.2, 2.2 Mating ring
2.1.3 Thrust ring
2.4 Collar
2.5, 19 Drive screw
2.7, 21, 22 Set screw
4, 10 Gland plate
5, 6, 11, 13 Pin
7 Flow distributor
8, 12, 15 Retaining ring
14 Throat bushing
16 Hexagon bolt
18 Seal sleeve
20 Drive collar
23 Setting device
24 HSH Cap screw

F Flush
CSV Containment seal vent
GBI Gas buffer IN
CSD Containment seal drain

LL9DJUE

PDF data sheet

Features

  • API 682 Category 2 and 3, Type A, Arrangement 2 seal
  • Dual seal in face-to-back arrangement
  • Dry contact outer seal (containment seal)
  • Balanced
  • Cartridge unit
  • Stationary multiple springs
  • Solid seal faces

Advantages

  • Outer seal which can be used for flashing as well as non-flashing applications prevents hazardous emissions in case of inboard seal failure
  • Low heat generation and power consumption due to narrow seal face width of inner seal
  • Longer seal life
  • Good followability due to no influence from run-out, squareness or vibration of the shaft
  • 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 (primary seal): p = vacuum ... 60 bar (870 PSI)
Pressure (secondary seal): p = 2.75 bar (40 PSI) normal operation,
max. 60 bar (870 PSI) in wet operation
Temperature: -40 °C … +176 °C (-40 °F … +349 °F)*
Sliding velocity: ... 25 m/s (82 ft/s)

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

Materials

Seal ring (primary seal): Blister resistant carbon,
Silicon carbide SSiC (Q1), RBSiC (Q2)
Seal ring (secondary seal): Special carbon
Mating rings:
Silicon carbide SSiC (Q1), RBSiC (Q2)
Secondary seals:
FKM (V), FFKM (K), EPDM (E), NBR (P)
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-CS

Recommended applications

  • Light volatile hydrocarbons
  • Refining technology
  • Oil and gas industry
  • Petrochemical industry
  • Chemical industry
  • Power plant technology
  • CCUS
  • Alternative fuels production
  • LPG plants
  • API 610 / ISO 13709 pumps
  • Process pumps

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