Mechanical Seal Style 78A

API Heavy Duty Rotating Metal Bellows Double Cartridge Seal

For High Temperature and Dirty Critical Services Where Leakage Must be Completely Contained

The Flexaseal Style 78A tandem cartridge seal is specifically designed for ruggedness and durability to withstand higher temperature or dirty services were leakage and emissions must be completely contained. Design elements include retained faces to allow for pressurized or unpressurized barrier systems, rotating metal bellows for self-cleaning and pilot gland to positively center the seal.

Style 78A is available in a High Temperature (HT) design with static O-Rings or with Grafoil Packing. This allows for operating temperatures up to 800F, while improving reliability by eliminating the dynamic secondary sealing element.

The Style 78A cartridge seal is uniquely customizable to your specific application requirements. API 682 Compliant options are also available.

Mechanical Seal Style 78A

Features

  • Easy to install cartridge designs
  • Incorporated pumping ring improves the movement – and the cooling effect – of the barrier fluid during operation
  • A tangential connection maximizes the flow of barrier fluid
  • Can be operated in pressurized or non-pressurized configurations
  • Static O-rings throughout cartridge
  • Self-cleaning bellows action
  • Metric and ANSI Sizes Available
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation
  • Hydraulically balanced design
  • Double-ply bellows design available for higher pressure
  • Shrouded face design for added protection
  • Designs available include API 682 Type B low temperature and Type C high temperature as well as Tandem Arrangements 2 and 3

Specifications

Operating Parameters

Max Temp: 400°F (204°C)
Max Pressure: Inboard – 300 PSI (20 bar)
Outboard – 250 PSI (17 bar)
Max Speed: 4500 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Flexaseal Engineered Seals and Systems, LLC if in doubt.

Downloads

For more information on style 78A

Quote Request

Depending on your specific needs and application, Flexaseal can help you identify the ideal products. Contact us to tell us about your needs and request a quote.

 

Mechanical Seal Style 76A

Tandem Rotating Welded Bellows Cartridge

Style 76A

Features

  • Cost effective version of Style 78A, designed for applications in which pumping ring or tangential connection are not required

Specifications

Operating Parameters

Max Temp: 400°F (204°C)
Max Pressure: Inboard – 300 PSI (20 bar)
Outboard – 250 PSI (17 bar)
Differential Pressure – 15-25 PSIG recommended. Higher pressure is available consult Flexaseal.
Max Speed: 4500 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Flexaseal Engineered Seals and Systems, LLC if in doubt.

Downloads

For more information on the style 76A

Quote Request

Depending on your specific needs and application, Flexaseal can help you identify the ideal products. Contact us to tell us about your needs and request a quote.