Flowserve Cartridge Seals - Manual (Page 5)

5
4 Operational Recommendations for Dual
Cartridge Seal
4.1 A dual seal must be supplied a clean buffer/barrier fluid compatible
with the product.
4.2 Dual pressurized seals must at all times maintain barrier fluid
pressure at least 172 kPa (25 psig) above the maximum product
pressure in the seal chamber.
4.2 The recommended piping for a dual pressurized seal with the use
of a Supply Tank is shown in Figure 2, Plan 53A. Circulation from
an external source is shown in Figure 3, Plan 54. Other mechanical
seal support systems are also available from Flowserve.
4.3 Turn on any cooling water to the supply tank or other support
system.
4.4 Start-up the seal barrier fluid system before starting pump.
4.5 Do not start up the equipment dry. Vent air from the casing of the
pump before startup.
4.6 If the seal runs hot, check for proper seal setting, seal housing
dimensions, and check the barrier fluid system. Do not allow the
equipment to run for any extended time if the seal gets hot or
squeals.
For special problems encountered during installation, contact your
nearest Flowserve Sales and Service Representative or Flowserve
Authorized Distributor.