AST 80 Dual Cartridge Seal

The AST80 dual mechanical seal incorporates liquid shear pumping to remove heat from the seal faces, and can be operated with a pressurized barrier or non-pressurized buffer fluid system.

The AST 80 is double balanced and can be used in 3 ways:

Double Seal

With barrier fluid pressure higher than product pressure, the AST 80 prevents leakage of toxic or hazardous fluids into the environment. The barrier fluid provides lubrication to seal gases and non-lubricating fluids.

Tandem Seal

By using a buffer fluid with pressure lower than process, the AST 80 can reduce pressure differential across a single set of seal faces.

Spare Seal

With unpressurized buffer fluid, the outboard seal of the AST 80 runs “at idle” as a standby seal. If the inboard seal fails, the outboard seal provides primary protection, eliminating unscheduled shutdown of batch processes.

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Field Rebuildable

No more waiting for seal repairs, and no more worries about installing exchange seals that might have previously held hazardous materials because the AST70 is easy-to-rebuild on-site using standard tools.