Premium-grade construction and reliability
without a premium-grade price.

The FSI Series 1015 is an economic mechanical cartridge seal ideal for industrial use with most ANSI and DIN pumps, as well as with many other pumps and rotating equipment. It handles the most demanding services and fits standard stuffing boxes without modifying the pump. It’s also available for big bore seal chambers.

Premium-grade construction is standard, with options for FFKM or EPR elastomers and premium carbon, sintered silicon carbide faces. The FSI Series 1015 features viton elastomers, 316 stainless steel hardware, and a large flush port for API plan 11, 13, or 32 operation. Its self-aligning stationary design features a flexible stator that enables even face loading, and a four-bolt gland ensures the seal sets axially and radially.

Cartridge installation is easy — there are no setting clips to remove. Even more, its springs are isolated from the product and are non-clogging. That means they are less susceptible to corrosive damage, resulting in extended seal life. As with all our seals, the FSI Series 1015 is factory preset to eliminate installation errors and pressure tested to ensure greater sealing reliability for your application.


  • Temperatures: 0F to 400F (205 C)*
  • Pressure: Up to 300 psi (21 BAR)*
  • Speeds Up to 5000 FPM* (25 m/s)


View our full 1015 brochure