Type 28VL
Non-contacting Gas Seal for Vaporizing Liquids
![](/-/media/j/johncrane_com/images/products/mechanical-seals/dry-gas/type-28vl/img1473.jpg?w=800&h=800&bc=ffffff&r=3bcca187-9a4d-4d7e-b74f-372faf9c0a78&hash=2952834883E13C54FC47AAFF95161BBC)
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.
![](/-/media/j/johncrane_com/images/products/mechanical-seals/dry-gas/type-28vl/img1473.jpg?w=800&h=800&bc=ffffff&r=3bcca187-9a4d-4d7e-b74f-372faf9c0a78&hash=2952834883E13C54FC47AAFF95161BBC)
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Features
- California Residents: PROPOSITION 65 WARNING
- Extended wear life
- Outstanding reliability
- Reduced power consumption
- Zero process contamination
- Reduced emissions
Parameters
- 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
Recommended Applications
- 流程泵
- 其他转动设备