2221 Double Tb2 Mechanical Seals for Sulzer® APP Pumps

TECHNICAL FEATURES

•Stationary compensating seal end face with double-balanced design, ensuring stable operation even under pressure fluctuations.

•Single set of multi-spring compensation structure, providing more uniform compensating force on the seal face.

•Double mechanical seal with single-set spring configuration and piston-type sliding O-ring design, featuring large axial runout that does not affect spring load.

•Modular design with standardized universal components, facilitating reduced maintenance costs.

•The spring is not in contact with the medium, ensuring a long service life of the mechanical seal.

•Positioned by the shaft shoulder for easy installation, which reduces the risk of human error. No measurement is required during installation.

•Inlaid ring surface structure: the seal ring has no drive pin, avoiding seal face rupture during startup.

PRODUCT DESCRIPTION

Dimensions Compliant with Sulzer APP Pumps, Covering Shaft Diameters Including 30, 40, 50, 60, 80, 90.

TYPICAL INDUSTRIAL APPLICATIONS

The 2221 Series is a double-balanced mechanical seal, specifically designed for harsh applications in the pulp and paper industry as well as stock applications. This seal is typically used in pumps handling abrasive and environmentally hazardous liquids in digesters, evaporation, and causticizing facilities of pulp mills. Engineered as a pressurized double mechanical seal, its double-balanced feature allows it to be utilized as an unpressurized double-ended unit. The Type 2221 seal is exclusively designed for Sulzer's APP Series pumps.

Recommended Piping Plans

Performance Capabilities