PPC MECHANICAL SEALS

Cryogenic Mechanical Seals

September 2, 2011

PPC has been manufacturing mechanical seals since 1958. 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.

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

Housing O-ring

Bronze Non-Sparking Sleeve

Housing for Seal

Welded Metal Bellows Capsule

with Bellows in Blue

Right or Left Hand Threads

PPCF Stationary Face (Proprietary

Polymer)

Anti-Rotation Pin

Solid Tungsten Carbide with

Engineered Surface Treatment

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.

PPC’s Four Standard Cryogenic Seals

PPC’s 445 Cryogenic Seal Showing the Welded Bellows

(Sleeve removed)

PPC’s 455 Cryogenic Seal

PPC’s 425 Cryogenic Seal.

PPC’s 445 Cryogenic Seal With Bronze Sleeve Installed.

PPC’s 415 Cryogenic Seal With Bronze Sleeve Installed.