Shaft seals offer superior gland gasket retention

The PSS range of split mechanical shaft seals from Flowserve have been redesigned to provide superior gland gasket retention, and can now tolerate shaft run-out up to 0.060" (1.5mm).

The PSS range of split mechanical shaft seals from Flowserve have been redesigned to provide superior gland gasket retention, and can now tolerate shaft run-out up to 0.060" (1.5mm).

They are also now even easier to install, with only two major components and eliminating the need for seal face handling.

Called the PSS II series, these seals feature a split semi-cartridge design suitable for use with non-hazardous liquids.

They have been developed as packing replacement for use on agitators, mixers double ended pumps and similar large rotating shaft equipment as found in the chemical, pulp and paper, wastewater treatment, power generation, mining and other general engineering installations.

With pre-engineered assemblies, for both the rotating and stationary elements, equipment measurements are eliminated, as is the need to handle small component parts such as seals, gaskets, springs and pins etc.

External mounting outside the seal chamber, coupled with the time saving split design also obviates the need for bearing removal, equipment dismantling or complete teardown.

Unique setting features are also incorporated which position and centre the assembly without the need for special tools or measurements.

Set-screws lock the mounting collar to the shaft which increases the seal pressure capability to 150psi (10 bar).

Seal faces are pin driven providing positive seal face torque with high viscosity fluids, while clogging and seal face hang-up is eliminated by special design involving non-wetted springs and pins.

A standard flush tap connection is provided to facilitate flushing to maintain clean, cool environment at the seal faces for long seal life.

Carbon and aluminium oxide stator/rotor seal materials are supplied as standard with optional silicon carbide also available for both.

A wide range of imperial and metric shaft sizes can be accommodated covering maximum operating parameters of 150psi (10 bar) pressure, 250øF (121øC) temperature, and 3600rpm speed.

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