78A-Heavy Duty Rotating

The 78A tandem cartridge seal is specifically designed for ruggedness and durability to withstand higher temperature or dirty services where 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 a 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 800°F, 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.

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