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DOUBLE CARTRIDGE MECHANICAL SEAL


Technical Features

Self-venting, bi-directional barrier fluid connections accommodate shaft rotations in either direction on horizontal and vertically mounted equipment.

Double balanced, stationary design can be operated in two modes. In double mode the barrier fluid pressure higher is than stuffing box pressure. In tandem mode the barrier fluid pressure is lower than stuffing box pressure and can accommodate pressure reversals at the inboard faces.

Cool running double cartridge design combines large internal clearances, optimal inboard and outboard face widths, and centrally located flush ports. These features maximize the circumferential flow around the seal faces, resulting in more efficient cooling and extended seal life.

Optional special metal insert provides a cost effective alternative for corrosive service. This design variation uses a special metal insert (Titanium, Hastelloy “B”, “C”) for the process wetted surface in a standard 316 SS gland.

Rotary inboard faces stabilized under compression are flexibly mounted utilizing o-rings for their shock and vibration absorption qualities.  This eliminates premature fractures in the faces under thermal and mechanical shock that can cause catastrophic failures in other designs with faces under tension.

Balanced stationary cartridge design utilizes all static o-rings, which eliminates damage to the pump shaft/sleeve or seal normally caused by rotary pusher component or pusher cartridge type seals, allowing use of solid pump shafts that minimize deflection.

Interchangeable stationary faces enable application customization, resulting in stable, secure sealing, accommodating the widest range of operating conditions and applications in industry. Choose from:

  • Monolithic, one-piece face designs that provide unparalled face stability under fluctuating system operating conditions, resulting in superior emission control capabilities.
  • Two piece face designs that assure optimum seal performance for the most challenging, demanding environments where one piece face construction is vulnerable to premature failure.

Positive hold, metal centering clips center the seal in both the axial and radial directions.

Choose from spare parts kits for field repair or the optional factory repair program.  State of the art, easy-to-install design uses the least number of components, simplifying field repair, resulting in low life cycle costs. All seals are pressure tested at the factory assuring 100% startup sealability.

Optional Features and Ordering Information:

  • 2 piece stationary face Special metal insert: order seal model S200
Application Data
Shaft speed: To 3600 RPM
Pressure: Vacuum to 400 PSI
Temperature: See O-ring limitations

 

Materials
Metal Parts: 316SS,  Alloy 20,  Hastelloy “C”,
Titanium
Springs: Hastelloy “C”
Faces: Combinations of Carbon, Sintered-Silicon
Carbide, and Tungsten Carbide
Elastomers: Viton,  EPR, Kalrez, Aflas, Teflon


SINGLE CARTRIDGE MECHANICAL SEAL


Technical Features

Cool running gland design provides clearances 10 times greater than the average clearance provided by other seal manufacturers’ designs, This feature maximizes the volume of flow around seal faces, resulting in a cooler, cleaner face environment, providing extended seal life.

Tangential flush connections positioned over the seal faces utilize the largest thru hole diameter available, supplying over 4 times the volume of straight drilled flush holes, providing maximum cooling and cleaning of seal faces maximizing seal life.

Interchangeable stationary faces enable application customization, resulting in stable, secure sealing, accommodating the widest range of operating conditions and applications in industry. Choose from:

  • Monolithic, one-piece face designs that provide unparalled face stability under fluctuating system operating conditions, resulting in superior emission control capabilities.
  • Two piece face designs that assure optimum seal performance for the most challenging, demanding environments where one piece face construction is vulnerable to premature failure.

Rugged, heavy-duty gland castings eliminate distortion related failures typically encountered on “low cost, light duty gland designs”.

Rotary inboard faces stabilized under compression are flexibly mounted utilizing o-rings for their shock and vibration absorption qualities.  This eliminates premature fractures in the faces under thermal and mechanical shock that can cause catastrophic failures in other designs with faces under tension.

Balanced stationary cartridge design utilizes all static o-rings, which eliminates damage to the pump shaft/sleeve or seal normally caused by rotary pusher component or pusher cartridge type seals, allowing use of solid pump shafts that minimize deflection.

Positive hold, metal-centering clips center the seal in both the axial and radial directions.

Optional features:

  • 2 piece stationary face
  • Quench and drain feature

Choose from spare parts kits for field repair or the optional factory repair program.  State of the art, easy-to-install design uses the least number of components, simplifying field repair, resulting in low life cycle costs.

All seals are pressure tested at the factory assuring 100% sealability during startup.

 

Application Data
Shaft speed: To 3600 RPM
Pressure: Vacuum to 400 PSI
Temperature: See O-ring limitations

 

Materials
Metal Parts: 316SS,  Alloy 20,  Hastelloy “C”,
Titanium
Springs: Hastelloy “C”
Faces: Combinations of Carbon, Sintered-Silicon
Carbide, and Tungsten Carbide
Elastomers: Viton,  EPR,  Kalrez, Aflas, Teflon