LL9DTUU
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LL9DTUU

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LL9DTUU
LL9DTUU
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Technical drawing of LL9DTUU

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Item Description
1.1.1, 2.1.1 Seal ring
1.1.2, 1.1.6, 1.3, 2.1.2,
2.1.6, 2.3, 3, 5 O-Ring
1.1.3, 2.1.3 Spring
1.1.4, 2.1.4 Thrust ring
1.1.5, 2.1.5 Drive screw
1.1.7, 2.1.7 Collar
1.1.8, 2.1.8, 11 Set screw
1.2, 2.2 Mating ring
4 Seal sleeve
6, 8 Gland plate
7 Retaining ring
9 Hexagon bolt
10 Drive collar
12 Setting device
13 HSH Cap screw

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

LL9DTUU

PDF data sheet

Features

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

Advantages

  • 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 = vacuum ... 42 bar (... 609 PSI)
Temperature: t = -40 °C ... +176 °C (-40 °F … +349 °F)*
Sliding velocity: vg ... 23 m/s (... 75 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:
FKM (V), FFKM (K), EPDM (E), NBR (P)
Springs: Hastelloy® C-276 (M5)
Metal parts: CrNiMo steel 316 (G), Duplex (G1)

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

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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