Flowserve ST Series - Manual (Page 7)

3 Seal Operation
To assure reliable noise free operation of this sealing product,
the following operating guide must be observed.
3.1 Maintain barrier fluid flow and pressure. Begin and confirm
Plan 54 barrier flow at least five minutes before starting the shaft.
This insures that all high point cavities are properly wetted and
delivering lubricant to the rubbing surfaces within the seal.
3.2 Do not exceed the maximum barrier pressure specified
for the seal design.
3.3 Do not exceed the maximum vessel pressure. Make sure
the vessel pressure does not exceed the barrier pressure.
3.4 Do not exceed the maximum vessel temperature specified
for the application. This could exceed the temperature limits
of the materials of construction of the seal.
3.5 Do not rotate the mixer shaft during SIP if steam is injected
into the Plan 54 barrier cavity. Steam is not an adequate
lubricant for the rubbing surfaces.
4 Repairs
This product is a precision sealing device. The design and dimension
tolerances are critical to seal performance. Only parts supplied by
Flowserve should be used to repair a seal. To order replacement parts,
refer to the part code and B/M number. A spare backup seal should be
stocked to reduce repair time.
When seals are returned to Flowserve for repair, decontaminate the
seal assembly and include an order marked "Repair or Replace."
A signed certificate of decontamination must be attached.
A Material Safety Data Sheet (MSDS) must be enclosed for any
product that came in contact with the seal. The seal assembly will
be inspected and, if repairable, it will be rebuilt, tested, and returned.
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