Mechanical seal john crane
Type 2874
Non-contacting Dual Gas Seal Cartridge for Pumps Type 2874
The Type 2874 is an internally pressurized, gas-lubricated, non-contacting dual cartridge seal designed for use in API, ANSI and DIN large-bore seal chambers.
Product Description Type 2874
- Non-contacting, internally pressurized outward pumping dual seal cartridge for new and existing pumps
- For Maximum Achievable Control Technology (MACT) and high reliability sealing of volatile or hazardous fluids in chemical, petrochemical and refining processes
- For process fluids that display turbidity or solids in suspension.
- For sealing high purity fluids without potential for product contamination
- For sealing fluids that are sensitive to thermal gain or decay
- For use in API, ANSI and DIN large bore seal chambers
Table Parameters Type 2874
| Temperature Limits | -30°F to 500°F/-34°C to 260°C |
|---|---|
| Pressure Limits | Vacuum to 600 psi(g)/(41 bar(g) Maximum differential pressure (process/inbd) is 150 psi(g) |
| Speed Limits | 1450 to 3600 rpm Consult engineering for low- or high-speed designs. |
| Other | 1.375 to 4.000″ Consult engineering for non-standard sizes |
Features Type 2874
- California Residents: PROPOSITION 65 WARNING
- ID to OD pumping spiral groove arrangement places process fluid at the OD of the inboard seal.
- Eliminates low flow regions in close proximity to inboard seal
- Reduces dewatering and hang-up
- Rotating mating ring imparts centrifugal flow to fluid in the seal chamber, which keeps fluid moving and helps prevent solids from falling out of solution.
Recommended Applications Type 2874
- Process pumps
- Other rotating equipment