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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
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
Recommended piping plans
Process side:
API Plan 01
API Plan 02
API Plan 03
API Plan 11
API Plan 12
API Plan 13
API Plan 14
API Plan 21
API Plan 22
API Plan 23
API Plan 31
API Plan 32
API Plan 41
Between seals:
API Plan 52
API Plan 53A
API Plan 53B
API Plan 53C
API Plan 54
API Plan 55
Atmospheric side*:
API Plan 61
API Plan 62
API Plan 65A
API Plan 65B
* Throttle bushing on request.
