LL9DSUU
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LL9DSUU

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LL9DSUU
LL9DSUU
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Technical drawing of LL9DSUU

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Item Description
1.1 Seal ring
1.2, 3, 4, 10 O-Ring
1.3 Spring
2 Mating ring
5, 8 Gland plate
6 Pin
7 Retaining ring
9 Hexagon bolt
11 Seal sleeve
12 Drive screw
13 Drive collar
14, 15 Set screw
16 Setting device
17 HSH Cap screw

LBO Liquid barrier OUT
LBI Liquid barrier IN

LL9DSUU

PDF data sheet

Features

  • API 682 Category 2 and 3, Type A, Arrangement 3 seal
  • Dual seal in face-to-face 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:
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 - 3CW-F

Recommended applications

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

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