Flowserve ISC Series Manuale Utente Scaricare il pdf (Pagina 12)

4.2 For dual pressurized seal (double seal) operation, supply a clean

compatible barrier uid to the inlet port at a pressure at least

170 kPa (25 psi) above the seal chamber pressure. See Figure 9.

The pressure of the barrier uid must not exceed the recommended

maximum pressure. Flowserve can supply information on barrier

uid ow requirements based on seal size, product temperature,

barrier uid characteristics, and shaft speed.

4.3 For dual unpressurized (tandem seal) operation, supply a clean

compatible buffer uid to the inlet port at a pressure below the seal

chamber pressure. See Figure 10. The pressure in the seal

chamber must not exceed the recommended maximum pressure.

Flowserve can supply information on buffer uid ow requirements

based on seal size, product temperature, buffer uid characteristics,

and shaft speed.

Double ISC with Supply Tank Figure 9

Bypass

Flush to

Gland

Flush Port

Supply Tank

Assembly with

Cooling Coils

1.2 m (4 feet)

maximum

Pressure

Source

0.45 - 0.6 m

(1.5 - 2 feet)

minimum

Oriﬁce

Option

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Flowserve ISC Series Manuale Utente Pagina 12