4
4 SL-5200
Figure 6 contains guidelines for buffer fluid systems which can be used with the SL-5200 double seal.
Figure 3 is a suggested piping arrangement for the SL-5200 with circulating feature and supply tank
with cooling coil. For other sealing liquid systems using Dura Circulators, external flushing or thermal
convection, refer to the assembly drawing or consult Flowserve, Flow Solutions for instructions.
4.1 Always start up the sealing liquid supply before starting equipment. Be sure that the sealing
liquid pressure is greater than the maximum pressure of the process fluid acting on the
seal chamber.
4.2 Seal liquid pressure must not exceed the pressure velocity rating of the seal design and
materials of construction.
4.3 Be sure cooling water to supply tank or circulator is on.
4.4 Never start up equipment dry. Properly vent all air.
4.5 If the seal runs hot or squeals, check the seal liquid flow between the seals and check the seal
housing dimensions to insure that the seal is not over-compressed.
For special problems encountered during installation, contact your nearest Flowserve Sales and
Service Representative or Authorized Distributor.
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