MECHANICAL SEALS
GEM 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 GEM seal are located in the gland, therefore are not required to flex to adjust to misalignment, thus eliminating wear in secondary areas of the seal. |
Fits Narrow Stuffing BoxesSeal sizes 1" through 1-3/8" (inclusive) require a 5/16" cross section; seal sizes 1-1/2" through 2-5/8" (inclusive) require a 3/8" cross section. |
Cast GlandThe 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 ServiceDisassembling the pump is unnecessary to make impeller clearance adjustments. |
Cartridge MountedThe seal is pre-assembled at the factory, mounted on its sleeve and installed in the gland for easy installation. |
No Installation MeasurementsMechanics are not required to make critical installation measurements in order to install the seal. |
No Shaft Fretting WearNo shaft fretting wear occurs, because the O-ring on the shaft is static and does not move. |
GEM Seal Specifications
Ratings
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Metal Parts:
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Secondary Seals
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Face Materials:
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Rotating face (mating ring)
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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 VGS seal are located in the gland, therefore are not required to flex to adjust for misalignment. |
Fits Narrow Stuffing BoxesSeal sizes 1" through 1-3/8" (inclusive) require a 5/16" cross section; seal sizes 1-1/2" through 2-5/8" (inclusive) require a 3/8" cross section. |
Slotted GlandThe slotted gland offers more versatility with bolting patterns. |
Impeller Adjustments In ServiceDisassembling the pump is unnecessary to make impeller clearance adjustments. |
Cartridge MountedThe seal is pre assembled at the factory, mounted on its sleeve and installed in the gland for easy installation. |
No Installation MeasurementsMechanics are not required to make critical installation measurements in order to install the seal. |
No Shaft Fretting WearNo shaft fretting wear occurs, because the O-ring on the shaft is static and does not move. |
VGS Seal Specifications
Ratings
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Metal Parts:
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Secondary Seals
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Face Materials:
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Rotating face (mating ring)
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RBD Reciprocal Balanced Duplex Cartridge Mounted Seal
 | RBD seals are used in applications where a product leakage of hazardous, toxic and costly products cannot be tolerated and / or applications which require positive lubrication without dilution of pumped product. |
Cartridge MountedFactory assembled and pressure tested prior to shipment. |
Slotted GlandThe slotted gland offers more versatility with bolting patterns. |
Compact DesignPermits use in smaller ANSI pumps without equipment modification including those with 5/16" cross section stuffing boxes. |
Stationary Seal DesignEliminates spring fatigue and automatically aligns seal faces at a perfect right angle to pump shaft. |
Reciprocal BalanceCan be used as a double or tandem seal. |
No Installation MeasurementsMechanics are not required to make critical installation measurements in order to install the seal. |
Longer Seal LifeAll O-rings and tabs are virtually static during normal service conditions and are not required to adjust for misalignment, therefore they last longer. |
Impeller Adjustments In ServiceDisassembling the pump is unnecessary to make impeller clearance adjustments. The cartridge unit allows you to easily perform this function. |
RBD Seal Specifications
Ratings
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Metal Parts:
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Secondary Seals
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Face Materials:
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Rotating face (mating ring)
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SRS Short Rotary Mechanical Seal
 | SRS is a single inside rotary unit designed for general service. Its short working length and small cross-section permit installation is smaller stuffing boxes without equipment modifications. For ease of interchangeability, various stationary seat ring designs and materials are available. The SRS is also economical and fully disposable. |
Resists CloggingThe O-ring is located at the back of the carbon holder to prevent particle build up. |
Dynamically BalancedThe hydraulic balance is achieved within component parts of the unit. This eliminates the need for special shaft sleeves or costly shouldered shafts. |
No Shaft FrettingStatic O-ring eliminates shaft sleeve wear. |
Reusable SleevesSince you can reuse your old pump sleeves, this seal can save you the cost of sleeve replacement. |
Isolated SpringsSprings are located out of fluid away from clogging particles and corrosive penetration. |
Ease of InstallationOne working dimension common to all SRS seals. |
Short-working LengthThe SRS will fit shorter stuffing boxes. |
Impeller Adjustments In ServiceDisassembling the pump is unnecessary to make impeller clearance adjustments. The cartridge unit allows you to easily perform this function. |
SRS Seal Specifications
Ratings
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Metal Parts:
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Face Materials:
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Viton® and Kalrez® are registered trademarks of DuPont Dow Elastomers