Mechanical seal john crane
Type 2874NE
Non-contacting, Non-elastomer Metal Bellows Outward Pumping Dual Gas Seal for High-temperature Applications Type 2874NE
A new, highly reliable gas-lubricated API 682 (ISO 21049) qualified high-temperature, non-contacting mechanical seal that utilizes internally pressurized outward pumping spiral groove face technology with high-temperature seal features such as Inconel-welded metal bellows and non-elastomeric flexible carbon graphite secondary seals. This innovative design technology is ideally suited for reliably sealing high-temperature process fluids on rotating equipment up to 800°F/425°C and fluids requiring inert secondary seals. Innovative alternative to conventional wet contacting seals that permits reliable operation in high-temperature services. Fugitive emissions for Maximum Achievable Control Technology (MACT) compliance for sealing higher-temperature, volatile or hazardous fluids. API 682/ISO 21049 qualified. Elastomer-free seal handles a wide range of applications. Eliminates problems associated with coking barrier fluids and fouled heat exchangers.
Product Description Type 2874NE
- Non-contacting, internally pressurized outward pumping dual welded metal bellows cartridge seal that permits reliable operation in high-temperature services
- 0.0 Fugitive Emissions for Maximum Achievable Control Technology (MACT) compliance for sealing higher temperature, volatile, or hazardous fluids
- For use in API 610 pump and larger bore seal chambers.
• API 682/ISO 21049 qualified - Elastomer-free seal handles a wide range of applications
- Eliminates problems associated with coking barrier fluids and fouled heat exchangers
Table Parameters Type 2874NE
| Temperature Limits | -100°F to 800°F/-75°C to 425°C |
|---|---|
| Pressure Limits | Vacuum to 230 psi(g)/16 bar(g) (See Basic Pressure Ratings curve on Product Specification sheet.) |
| Speed Limits | 1450 to 3600 rpm For speeds outside this range, contact John Crane Engineering. |
Features Type 2874NE
- California Residents: PROPOSITION 65 WARNING
- API 682/ISO 21049 qualified.
- Centrifugal advantage: process fluid at the OD of the bellows.
- Pressure-balanced design withstands full reverse pressurization.
- Static secondary seals have high-temperature capability and eliminate the cost of expensive perfluoro elastomers.
- Edge-welded metal bellows.
- Dual mating ring arrangement meets API 682 design requirements.
- Spiral groove technology for superior operating performance.
- Eliminates problems with coking barrier fluids and fouled heat exchangers.
Recommended Applications Type 2874NE
- Process pumps
- Other rotating equipment