The centrifuge is used in explosive or flammable applications in
chemical industry, petrochemical industry, pharmacy industry and
other industries, and any leakage of gas into the external
atmosphere is prohibited in the course of solid-liquid separation,
or used in solid-liquid separation in applications in which
explosion may be caused if the external air enters the inner
chamber of the centrifuge. Both ends of the bowl and the liquid
outlet are airtight to achieve the airtight and f|ameproof effect.
Structure and principle of airtight seal:
The gas-tight seal is a special structure consisting of the
mechanical seal and inert gas supply device. It effectively
prevents the external air from penetrating into the inner chamber
of the centrifuge, and prevents the gas inside the centrifuge from
leaking into the external environment.
The seal device consists of several seal rings and glands, and
separates the inner chamber of the centrifuge from the surrounding
environment. The inert gas is injected into the space among the
seal rings, and then penetrates into the inner chamber of the
centrifuge and the external environment through the narrow sealing
The pressure of inert gas is higher than those of the inner chamber
of the centrifuge and the external atmosphere, therefore,entrance
of air into the inner chamber of the centrifuge or escape of the
gas out of the inner chamber of the centrifuge can be avoided.
Seal of the centrifuge:
Atmospheric centrifuges are the standard version. They are used for
applications where there is no harm from products or vapors
released to the environment and where it is not necessary to
isolate the centrifuge bowl from the surrounding atmosphere.
Vapor-tight centrifuge seal is the right choice in cases where
substances emitted from the process could pollute the environment
or if contact of the product with ambient air is undesirable.
Gas-tight centrifuge allow the safe operation with toxic, corrosive
or flammable media by applying inert purge gas to rotor seals and
by inertizing the process chamber and centrifuge housing.
Attention: due to the principle of sealing, some of the injected inert gas
will leak into the surrounding environment. Therefore, it is
required to make sure that there should be enough oxygen in the
operation environment It is necessary to install an additional
environment monitoring system (such as gas detector) so as to
ensure personne| safety.