Penetration slider seal

Penetration slider seal For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Typical penetration slider seal cross section

Item Description
1 Hex bolt
2 Case pipe half
3 Flange half
4 Flange ring half
5 Pipe nipple
6 Pipe cap
7 Inner ring half
8 Inner seal
9 Loose insulation
10, 11 Outer seal
12 Sliding ring half
13 Boiler wall
(shown for illustration only)
  • Patented penetration seal design
    (U.S. patent 7478839).
  • Unlimited axial movement.
  • Floating ring design permits lateral movement without introducing high stresses into the penetration pipe and boiler wall.
  • Insulated
  • Sealing efficiency is augmented, rather than reduced, by particulate build-up: maintenance between shutdowns is minimized.
  • Maintenance and seal replacements can be performed without cutting pipe or welding.
  • Robust design limits replacement parts to stainless steel wire mesh seals and insulation.
  • Improved boiler efficiency through reduced gas seepage.
  • Improved boiler efficiency through reduced heat loss.
  • Emissions reduction
  • Noise reduction
Diameter: 50 mm (2”) to 600 mm (24”)
Process temperature: Up to 650 °C (1,200 °F)
Media: low-pressure turbine exhaust gases
Axial movement: unlimited
Lateral movement: 6 mm (0.25”) or 25 mm (1”)
Typical angular movement: 1°

Movements are concurrent.
  • Case pipe: A53B, A106B, 10 mm (0.375”)
  • Flange ring: A516-70, 12 mm (0.5”)
  • Inner ring: A516-70, 12 mm (0.5”)
  • Sliding ring: A516-70, 38 mm (1.5”)
  • Inner seal: Braid hose with stainless steel filler
  • Outer seal: Braid hose with stainless steel filler
  • Power plant technology
  • Petrochemical industry
  • Refining technology
  • Chemical industry
  • Process industry
PSS penetration slider seals are used to reduce heat loss and gas seepage at points where pipes penetrate a boiler wall. They permit unlimited axial movement and can be easily maintained.
  • Skilled field service teams can provide site support.
  • Experienced supervision by our field service personnel available.