Mechanical seal john crane
Type 2874HTC
Non-contacting, Metal Bellows, Outward Pumping Dual Pressurized Gas Lubricated Seal Type 2874HTC
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.
Product Description Type 2874HTC
- Non-contacting, outward-pumping, metal bellows, dual-pressurized gas seal that permits reliable operation in high-temperature services
- High-temperature corrosion (HTC) resistance for reliable sealingin hot hydrocarbon and low-temperature applications with enhanced seal face stability
- Significantly reduces life-cycle costs compared to conventional wet seals and systems and eliminates problems associated with coking barrier fluids and fouled heat exchangers
- API 682-qualified
- Zero fugitive emissions for maximum achievable control technology (MACT) compliance when sealing high temperature, volatile or hazardous fluids
- For use with API 610 pump and larger bore seal chambers
- Elastomer-free seal handles a wide range of applications
Table Parameters Type 2874HTC
| 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) |
Features Type 2874HTC
- 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
Recommended Applications Type 2874HTC
- High-temperature hydrocarbons
- Low-temperature fluids
- Volatile organic compounds
- Hazardous & carcinogenic fluids
- Heat dependent fluids (thermosensitive)
- High purity fluids
- Polymerizing fluids
Equipment Type 2874HTC
- Pumps
- Blowers and other rotating equipment