Controlled Gap Seals
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DESIGN VARIATIONS
Design flexibility allows for a wide range of variations.  Some of the many possible modifications are illustrated by the figures shown.
Single seal with carbon labyrinth ring assembly. Carbon grade material to suit specific temperature applications not exceeding   600°F. This seal utilizes a removal washer to facilitate repair of internal components.	Single seal with silicon carbide labyrinth ring for temperature applications of 1600°F maximum where carbon grades are subject to oxidation.
Spring loaded double back to back seal of separable design. Double labyrinth ring assembly is used versus a single ring of equivalent length to minimize leakage. Leakage is less for the double ring because the interruptions cause additional losses due to entry and discharge.	Symmetrically designed single seal for reverse pressure conditions.
Double tandem seal arrangement for sealing a combination of liquids and gases. Housing designed for either gas injection or drainage. Full circular roll-over versus tab crimping minimizes axial movement of mating cap due to pressure.	Multiple labyrinth ring assembly incorporating a flanged housing for mounting directly onto the equipment case. Design utilizes gas injection on the high pressure and low pressure side. Housing is made of a non-magnetic stainless steel material to enhance vibration detection when a probe is used thru the center hole.
Multiple labyrinth ring assembly of separable design to facilitate replacement and/or rework of internal components.	Double tandem steel arrangement for sealing a combination of liquids and gases. Housing design is a metal stamping with flexible retaining tabs at the outside diameter.
A SHAFT DIAMETER RANGE B RADIAL CAVITY DIAMETER C LENGTH SINGLE MINIMUM D LENGTH DOUBLE I MINIMUM E LENGTH DOUBLE II MINIMUM .375/.875 0.375 0.406 0.437 0.562 1.000/1.500 0.391 0.422 0.500 0.625/ 1.625/2.125 0.406 0.453 0.625 0.937 2.250/2.750 0.422 0.484 0.750 1.125 2.875/3.250 0.437 0.516 0.937 1.250 3.375/4.000 0.469 0.531 1.000 1.500   NOTE: THE DIMENSIONS SHOWN ARE FOR              REFERENCE USE ONLY. THE AXIAL AND RADIAL              DIMENSIONS SPECIFIED CAN BE FURTHER              MINIMIZED TO SUIT THE AVAILABLE SPACE.              LABYRINTH SEALS CAN BE CUSTOM MADE TO              FIT A SPECIFIC UNIT HOUSING ENVELOPE.              CONSULT QUALISEAL ENGINEERING FOR              AVAILABLE SIZES AND DESIGN.