GEM (Cartridge Mounted Stationary Design Mechanical Seal)

The GEM seal is also available in a bellows design.

A stationary seal is “a seal design in which the flexible members (such as springs) do not rotate with the shaft but are mounted in the pump housing or gland.” The springs in the SEPCO GEM seal are located in the gland, therefore are not required to flex to adjust for the misalignment, thus eliminating wear in the secondary areas of the seal.

Fits Narrow Stuffing Boxes: Seal sizes 1″ through 1 3/8″ (inclusive) require a 5/16″ cross section, and sizes 1 1/2″ through 2 5/8″ (inclusive) require a 3/8″ cross section.

Cast Glands: The GEM design features a cast gland that offers improved strength with economy in mind. The gland has a vent and drain connection.

Impeller Adjustments in Service: Disassembling the pump is unnecessary to make impeller clearance adjustments.

Cartridge Mounted: The seal is pre-assembled at the factory, mounted on its sleeve and installed in the gland for easy installation.

No Installation Measurements: Mechanics are not required to make critical installation measurements in order to install the seal.

No Shaft Fretting Wear: No shaft fretting wear occurs because of the O-ring on the shaft is static and does not move.

Metal Parts:
Standard Metal Parts: 316 SS
Standard Springs: Hastelloy C
Standard Set Screws: 316 SS

Face Materials:
Stationary Face
Standard Face: High quality carbon / graphite.
Tungsten carbide available
Rotating Face (mating ring)
Standard Face: 99.7% alumina oxide and silbide
Tungsten carbide available

Secondary Seals:
Standard O-ring Material: Vitron and EPR
Kalrez available
FEP encapsulated O-rings available

Pressures: 350 p.s.i. (g)

Shaft Speeds: 1800 ft/min.

Temperatures: To 400°F / 204°C