Mechanical Seal Style 63A + 66A

API Stationary and Rotating Heavy Duty Metal Bellows Cartridge Seal

For Higher Temperature and Dirty Critical Services

The Flexaseal Style 63A/66A cartridge seal is specifically designed for ruggedness and durability to withstand higher temperature or dirty services. The Style 63A features a stationary bellows unit for superior performance in applications that require higher shaft runount or large assembly tolerances. The Style 66 is a rotating bellows unit for enhanced solids handling.

Standard Inconel 718 Bellows units for wide temperature and process fluid compatibility.

Grafoil packing throughout allows for operating temperatures up to 800F, while improving reliability by eliminating the dynamic secondary sealing element.

The Style 63A/66A cartridge seal is uniquely customizable to your specific application requirements. API 682 Compliant options are also available.

Mechanical Seal Style 63A

Features

  • Easy cartridge seal installation of the Style 64 stationary high temperature bellows
  • Proven high performance nesting ripple bellows design
  • High temperature static grafoil packing throughout seal
  • Standard Inconel 718 Bellows units for wide temperature and process fluid compatibility
  • Low expansion alloy face retainer
  • Upgradable to API design specifications with piloted gland and metal-to-metal confined gland gasket which prevents blow out or extrusion of the gasket
  • Flush, quench and drain connections with a throttle bushing
  • Carbon floating bushing option available
  • API 682 Type C Arrangement 1 available
  • Double-ply bellows core available for higher pressure

Style 63 Features

  • Stationary design accommodates higher shaft-to-stuffing box misalignment. The stationary bellows design only flexes once during installation unlike a rotating design which flexes on every revolution. This reduces face movement and increases seal life.
  • Bronze steam deflector option available to provide quenching to the inside of the bellows to prevent coke buildup

Style 66 Features

  • Rotating bellows are self-cleaning by design

Specifications

Style 63A Operating Parameters

Max Temp: 800ºF (425ºC)
Max Pressure: 300 PSI (20 bar)
Max Speed: 10,000 SFPM (50 m/sec)

Style 66A Operating Parameters

Max Temp: 800ºF (425ºC)
Max Pressure: 300 PSI (20 bar)
Max Speed: 4500 SFPM (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 63A + 66A

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.