LL9DSUU

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LL9DSUU

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

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-FF

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The Eagleburgmann Group

Sealing technology for plants and machines

EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.

Mechanical seals and more

Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.

What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.

EagleBurgmann WORLDWIDE