5
4
Operational Recommendations for Single Cartridge Seal
4.1 Do not start up the equipment dry. Vent air from the casing of the pump and the seal chamber
before startup. Check the seal assembly drawing for the recommended piping plan and follow
any special instructions. Plan 11 is a good default flush plan if none are specified for horizontal
pumps.
4.2 If the seal runs hot, check for proper seal setting, seal housing dimensions, and check the
bypass or flush line for obstructions. Do not allow the equipment to run for any extended time
if the seal gets hot or squeals.
5
Operational Recommendations for Dual Cartridge Seal
5.1 A dual seal must be supplied a clean buffer/barrier fluid compatible with the product.
5.2
Dual pressurized seals must at all times maintain barrier fluid pressure at least 1.7 bar
(25 psig) above the maximum product pressure in the seal chamber.
5.2 The recommended piping for a dual pressurized seal with the use of a Supply Tank is shown
in Figure 8, Plan 53A. Circulation from an external source is shown in Figure 9, Plan 54.
Other mechanical seal support systems are also available from Flowserve.
5.3
Turn on any cooling water to the supply tank or other support system.
5.4
Start-up the seal barrier fluid system before starting pump.
5.5 Do not start up the equipment dry. Vent air from the casing of the pump before startup.
5.6 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.
outlet
inlet
pressure source,
normally open
pressure
transmitter
level
transmitter
cooling coils
cooling in
drain,
normally
closed
cooling out
reservoir
liquid fill,
normally closed
level indicator
seal
end view
orifice
outlet
inlet
from / to external
pressurized barrier
circulating system
seal
end view
Plan 53A - Dual pressurized seal with
circulation through a supply tank
Figure 8
Plan 54 - Dual seal circulation
from an external source
Figure 9
