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6.3 If the turbine operates at a higher back pressure, the turbine can be
pressurized accordingly if there is sufficient pressure source and the
test flanges, etc. are rated as such. It is normal for the pressure to
decay more quickly at higher pressures.
6.4 Conduct a rotational test of the turbine with back pressure on the
seals set at minimum 345 kPa (50 psig). The shaft speed should
be a minimum 800 rpm for this test. Do not conduct the rotational
test at less than 345 kPa, this could result in seal face contact and
damage. Rotational testing is generally a short duration to check
overall equipment assembly.
6.5 After rotational testing, repeat step 6.2 and compare pressure decay
results. Pressure decay results should be equal.
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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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