LL9DTUE
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LL9DTUE

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LL9DTUE
LL9DTUE
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Technical drawing of LL9DTUE

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Item Description
1, 18 Seal ring
2, 7, 10, 12, 13, 15, 19, 23 O-Ring
3, 25 Collar
4, 21 Spring
5, 20 Thrust ring
6, 24 Drive screw
8, 26, 32, 33 Set screw
9, 22 Mating ring
11 Seal sleeve
14, 29 Gland plate
16 Flow distributor
17, 28, 30 Retaining ring
27 Throat bushing
31 Drive collar
34 Setting device
35 HSH Cap screw

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

LL9DTUE

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
  • 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
  • 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 ... 42 bar (… 609 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: ... 23 m/s (... 75 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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