VGS (Cartridge Mounted Stationary Design Mechanical Seal)

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 VGS seal are located in the gland and therefore are not required to flex to adjust for misalignment.

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.

Slotted Glands: The VGS design features a slotted gland that offers more versatility with bolting patterns.

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

Cartridge Mounted: The seal is pre-assembled at the factory, mounted on its sleve 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 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: 99.5% alumina oxide and silbide
Tungsten carbide available

Secondary Seals:
Standard O-ring Materials: Vitron and EPR
Kalrez available
FEP encapsualted O-rings available

Pressures: 350 p.s.i. (g) (see SEPCO recommendation guide)

Shaft Speeds: 1800 ft/min.

Temperatures: To 400°F / 204°C