Mechanical Seals

Styles 73 and 75

Flex-A-Seal is a respected leader in the design and manufacture of cartridge seals for critical toxic and fugitive emission applications where single seals are not acceptable. The simple idea of a second layer of protection provides the level of assurance that the world has come to expect.
The Style 73 offers the advantages of an inboard stationary metal bellows design, while the Style 75 offers the efficiency and economy of springs isolated from the product.
We have concentrated on the customer’s need for easy installation and low maintenance that can be operated in a pressurized or non-pressurized state.
These designs fit pumps with standard and enlarged bores without modification.
Retained faces eliminate the need for troublesome drive pins. Unlike traditional cup point set screws, which are commonly used in the rotary unit, Flex-A-Seal replaces them with stainless steel drive lugs, resulting in a five-fold increase in torque transmission strength.
In addition, there are no set screws to back out and the possibility of sleeve distortion is eliminated while the entire drive mechanism is out of the product.
Both cartridge seal designs are hydraulically balanced and the shrouded face provides additional protection.
Creative solutions offer the best hope for the preservation of our natural resources.

Max Temp - 400ºF (204ºC)
Max Pressure - 300 PSI (20 bar)
Max Speed - 3600 FPM (18 m/sec)