Flowserve Tandem Seal Manuel d'utilisateur télécharger pdf (Page 6)

Recommended Piping for Tandem Designs Figure3

API Plan 52

1. Solenoidvalveindrainisnormallyopenallowingprimarysealweepageto 

 ventthroughorice.

2. Ifprimarysealleakagebecomesexcessive,thepressureswitchinthe 

 secondarysealthermalconvectionloopwillactivatealarmandclose 

 solenoidvalveinthedrainline.

3. Bypasslinearoundsolenoidvalveisnormallyclosedbutisusedtobleed 

 systempressure.

Pressure Alarm

and Switch

Fill Connection

Supply Tank Assembly

API Plan 11

Bypass Line From

Pump Discharge

Orifice

.031" (.8mm)

Solenoid Valve

(normally open)

1 foot

(300 mm)

minimum

Bypass Valve

(normally closed)

To Recovery

Orifice

Option

Primary

Seal

Secondary

Seal

1 2 3 4 5 6 7 8

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Flowserve Tandem Seal Manuel d'utilisateur Page 6