1. Cryogenic Mechanical Seals
PPC MECHANICAL SEALS
Cryogenic Mechanical Seals
September 2, 2011

2. PPC has been manufacturing mechanical seals since 1958
PPC has been manufacturing mechanical seals since Our founder was an entrepreneur, an engineer at John Crane who saw an opportunity to repair and upgrade Crane seals, eventually developing proprietary seal lines.
Over the course of 53 years we have developed a complete line of mechanical seals with metal bellows manufacturing being a key component. Decades ago we developed a cryogenic seal line and in 2010 we set the bar even higher with our new cryogenic face technology.

3. PPC’s Standard Cryogenic Mechanical Seal Lines (Compatible for Liquid Oxygen Service)

4. Bronze Non-Sparking Sleeve
Housing O-ring
Housing for Seal
Bronze Non-Sparking Sleeve
Welded Metal Bellows Capsule with Bellows in Blue

5. Right or Left Hand Threads
Anti-Rotation Pin
PPCF Stationary Face (Proprietary Polymer)
Solid Tungsten Carbide with Engineered Surface Treatment

6. The uniqueness of PPC’s cryogenic seals is the sealing faces
The uniqueness of PPC’s cryogenic seals is the sealing faces. PPC has manufactured cryogenic seals for over 30 years and like all other companies struggled with finding a face combination that will handle the multiple conditions in the pumps: wet, dry and phasing. Until now customers had to guess at which face combination would work best for them.
PPC has combined a custom polymer face with a specially treated tungsten carbide to achieve significantly higher life than our competition’s seals.

7. PPC’s Four Standard Cryogenic Seals

8. PPC’s 445 Cryogenic Seal Showing the Welded Bellows
(Sleeve removed)

9. PPC’s 455 Cryogenic Seal

10. PPC’s 425 Cryogenic Seal.

11. PPC’s 445 Cryogenic Seal With Bronze Sleeve Installed.

12. PPC’s 415 Cryogenic Seal With Bronze Sleeve Installed.