PRODUCTS
LL9DJUU
API Standard 682 seal
Mechanical seals for pumps
Pusher seals
- 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 sleev
Feature
- API 682 Category 2 and 3, Type A, Arrangement 2 and 3 seal
- Dual seal in face-to-back arrangement
- Same size of inboard and outboard seal
- Balanced
- Cartridge unit
- Stationary multiple springs
- Solid seal faces
Product specification example
Standards and approvals
API 682 / ISO 21049
Materials
Seal ring: Blister resistant carbon, Silicon carbide SSiC (Q1), RBSiC (Q2)
Mating ring: 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)
Operating range
Pressure: p = 60 bar (870 PSI)
Temperature: -40 °C … +176 °C (-40 °F … +349 °F)*
Sliding velocity: vg = 50m/s (164 ft/s)
Viscosity: … 300 mPas
Solids content: 0.5 wt.%
* Engineered up to 260 °C (500 °F) with FFKM (K) secondary seals
Recommended applications
Refining technology
Oil and gas industry
Petrochemical industry
Chemical industry
Power plant technology
Light volatile hydrocarbons
LPG plants API 610 / ISO 13709 pumps
Process pumps
Recommended piping plans
Process side: 02, 11, 12, 13, 14, 21, 22, 23, 31, 32, 41
Between seals: 52, 53A, 53B, 53C, 54, 55
Atmospheric side*: 61, 62, 65A, 65B
* Throttle bushing on request
Applicable ranges, performance data and figures can serve only as a guide for selection and therefore in actual use there will be some cases where general specifications cannot be applied due to unknown factors or constraints.
Please check the applicability before use.
The contents are subject to change without notice for improvement.
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