Mechanical seal john crane
Type 28VL
Non-contacting Gas Seal for Vaporizing Liquids Type 28VL
Utilizing proven spiral groove technology, the Type 28VL harnesses the rotational energy of the pump shaft to vaporize the process fluid at a controlled rate, creating a stable gas film that lubricates the seal faces. Typical problems, such as dry-running wear, vapor lock in the seal chamber and “face popping” (which can lead to catastrophic failure of conventional wet seals), are eliminated by the Type 28VL non-contacting face technology.
Product Description Type 28VL
Utilizing proven spiral groove technology, the Type 28VL harnesses the rotational energy of the pump shaft to vaporize the process fluid at a controlled rate, creating a stable gas film that lubricates the seal faces.
- Typical problems, such as dry-running wear, vapor lock in the seal chamber, and “face popping” (which can lead to catastrophic failure of conventional wet seals), are eliminated by the Type 28VL non-contacting seal technology.
- For use on pumps where the process fluid is at or near its point of vaporization
Table Parameters Type 28VL
| Temperature Limits | -40°F to 400°F/40°C to 204°C |
|---|---|
| Pressure Limits | 1800 psi(g)/124 bar(g) per seal face |
| Speed Limits | 590fps/180m/s |
| Size Limits | 11″/280mm |
Features Type 28VL
- California Residents: PROPOSITION 65 WARNING
- Extended wear life
- Outstanding reliability
- Reduced power consumption
- Zero process contamination
- Reduced emissions
Recommended Applications Type 28VL
- Process pumps
- Other rotating equipment