Glossary

balance diameter:: The diameter that separates the high (seal gas supply) pressure area from the low (seal vent) pressure area of the primary gas seal ring. This is typically sealed with an o-ring or polymer seal for high pressure applications.
barrier seal:: A seal located between the bearing and the gas seal to prevent lube oil from contaminating the gas seal and process gas from migrating into the bearing housing. Usually a labyrinth or segmented carbon ring seal. Also known as a separation seal or tertiary seal.
bidirectional gas seal:: A gas seal designed to rotate in either direction. A bidirectional seal employs a symmetrical groove pattern on the mating ring face that is able to generate the forces required to separate the mating-ring and primary-ring faces in either direction of rotation.
buffer gas:: See seal gas:.
closing force:: The hydrostatic force acting on the gas seal mating ring in the direction of the primary ring. The closing force is a function of gas pressure, spring force, and friction.
coalescing filter:: A filter designed to remove liquid aerosols from a gas.
differential pressure control:: A system that controls the supply of seal gas to the seal by regulating the seal gas pressure to a predetermined value above a referenced sealing pressure.
double gas seal:: See double opposed gas seal:.
double opposed gas seal:: A two-stage, back-to-back arrangement, dry gas seal. Also known as a double seal.
dry gas seal:: A gas-lubricated, noncontacting, mechanical, end-face shaft end seal, consisting...

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Dry Gas Seals Handbook

TABLE OF CONTENTS

Glossary

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Dry Gas Seals Handbook

TABLE OF CONTENTS

Glossary

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