Type 2874HTC
Non-contacting, Metal Bellows, Outward Pumping Dual Pressurized Gas Lubricated Seal
Reliably sealing high and low temperature process fluids up to 425°C (800°F), the Type 2874HTC incorporates unique HTC (high-temperature, corrosion-resistant) metal bellows technology with non-contacting gas lubricated technologies.
The 2874HTC is a cost-effective alternative to conventional wet contacting seals supported by various piping plans that provide liquid barriers or quenches to the primary seal interface. Instead of using a wet support system, the advantages of non-contacting gas lubricated technology can be used for reliable operation with either nitrogen, argon, or steam barrier significantly reducing your lifecycle costs.
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Features
- California Residents: PROPOSITION 65 WARNING
- API 682 qualified
- HTC provides exceptional seal face stability and robustness at elevated temperatures for increased mean time between repair (MTBR)
- Spiral groove technology for superior operating performance and lower energy consumption
- Pressure balanced design withstands full reverse pressurization
- John Crane edge-welded metal bellows
- Centrifugal advantage: process fluid at the outside diameter of the bellows
- Non-elastomer static secondary seals have high-temperature capability
- Meets API 682 design requirements Type C, Arrangement 3 with dual mating ring design
- Green technology ensures zero fugitive emissions when sealing hazardous fluids
Equipment
- Pumps
- Blowers and other rotating equipment
Parameters
- Temperature Limits
- -75° to 425°C/-100° to 800°F
- Pressure Limits
- (Process fluid): Vacuum to 16 barg/230 psig, with N/Ar as barrier
Vacuum to 14 barg/200 psig with Steam as barrier
(Barrier) Up to 18 barg/260 psig (N/Ar), Up to 16 barg/230 psig (steam)
Differential barrier gas pressure: Minimum 2 bar/30 psi > maximum seal chamber pressure - Speed Limits
- 1450 rpm min./3600 rpm max
(Outside this range contact John Crane Engineering)
Recommended Applications
- High-temperature hydrocarbons
- Low-temperature fluids
- Volatile organic compounds
- Hazardous & carcinogenic fluids
- Heat dependent fluids (thermosensitive)
- High purity fluids
- Polymerizing fluids
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