Click image to enlarge
| Item | Description |
|---|---|
| 1.1.1, 1.1.2 | Seal ring |
| 1.1.3 | Driver |
| 1.1.4, 1.1.5 | Thrust ring |
| 1.1.6, 1.1.7, 1.3, 1.5 | O-Ring |
| 1.1.8 | Spring |
| 1.1.9, 7 | Set screw |
| 1.2, 1.4 | Mating ring |
| 3 | Seal sleeve |
| 4, 5 | Gland plate |
| 6 | Set ring |
| 8 | Setting device |
| 9 | Hexagon bolt |
LBO Liquid barrier OUT
Q Quench
LBI Liquid barrier IN
D Drain
H75A4-B
Features
- API 682 Category 2 and 3, Type A, Arrangement 3 seal
- Dual seal in back-to-back arrangement
- Balanced
- Cartridge unit
- Rotating multiple springs
- Integrated pumping device
- Suitable for pressure reversals
- Replaces the H75VK seal
Advantages
- Universally applicable both for retrofits or original equipment
- Efficient stock keeping due to standardized components
- Extended selection of materials
- Extended field of operation in terms of temperature and pressure
- Metal parts also in special materials available
- Safe operation due to metal torque transmission at the rotating carbon seal rings
Operating range
Shaft diameter:
d1 = 20 … 110 mm (0.79" … 4.33")
Pressure: p1 = 42 bar (609 PSI)
Temperature:
t = -40 °C … +176 °C (-40 °F … +350 °F)*
Sliding velocity: vg = 23 m/s (76 ft/s)
Axial movement:
d ≤50 mm ±1.0 mm
d >50 mm ±1.5 mm
* 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:
EPDM (E), NBR (P), FKM (V), FFKM (K)
Springs: C-276 (M5)
Metal parts: CrNiMo steel 316 (G) or equivalent,
optional materials on request.
Standards and approvals
- API 682 / ISO 21049
- API 682 4th ed. Cat. 2/3 - 3CW-BB
- Compliant to TA Luft (German Clean Air Act)
Recommended applications
- Highly volatile hydrocarbons
- Refining technology
- Oil and gas industry
- Petrochemical industry
- Chemical industry
- Power plant technology
- CCUS
- Hydrogen
- Sustainable plastics production
- Alternative fuels production
- Nuclear power technology
- 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 31
API Plan 32
API Plan 41
Between seals:
API Plan 53A
API Plan 53B
API Plan 53C
API Plan 54
Atmospheric side**:
API Plan 61
API Plan 62
API Plan 65A
API Plan 65B
* Piping plans 11 ... 41: Integration in seal to be dimensionally checked.
** Throttle bushing on request.
