Type-28VL-john-crane
Type-28VL-john-crane

Features mechanical seal 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

About Mechanical seal 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.

Design Features mechanical seal type 28vl

  • Extended wear life
  • Outstanding reliability
  • Reduced power consumption
  • Zero process contamination
  • Reduced emissions
  • Options available

Material mechanical seal type 28vl

  • Face/Primary Ring: Carbon
  • Seat/Mating Ring: Tungsten Carbide
  • Retainer/Disc/Drive Band: 410 Stainless Steel
  • O-ring: Fluoroelastomer
  • Springs: Alloy C-276

Operating range mechanical seal 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

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.