Flowserve 2564 Mixerpac - Manual (Page 10)

10
8.0 Starting Up the Machine
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Disengage setting plates of the MIXERPAC before start up the machine (see item 6.8).
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Parts of the MIXERPAC, which rotate during operation of the machine, must be
secured against contacts, in accordance with the specifications from the machine
manufacturer.
8.1 The MIXERPAC is ready for operation of the machine, after it has been installed, the
seal support system connected, the sealing chamber carefully vented and feeding
cooling medium into the installed cooling flange if applicable.
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It must be ensured that the sealing chamber is completely filled with barrier or
quench fluid and vented in every operating situation of the machine so as to
minimize frictional heat leading to increased temperature of the surfaces.
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The required flow rate for the cooling medium depends on the respective operat-
ing conditions. The flow rate should be between 300 and 600 l/h and must allow
adjustments in line with the respective operating conditions.
8.2 The installed MIXERPAC is bidirectional.
8.3
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The sealing chamber must be vented carefully before startup of the machine.
8.4 For the static pressure test on the product vessel the pressure may not exceed the
values given under item 1.1.
8.5 To check the unchanged position of the shaft sleeve after the pressure test of the
product vessel, engage an installation plate. Afterwards, the installation plate must
always be disengaged as per item 6.8.
8.6 The barrier or quench fluid should preferably be oil and must have a kinematic vis-
cosity between 1 and 50 mm 2 /s (cSt) during operation of the machine. Water or other
media with low boiling points (e. g. methanol) are also possible. In the case of fluids
with low boiling points used as barrier or quench fluid, a hard / soft material combi-
nation must be selected for the faces.
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The choice of the seal support system must accommodate for the viscosity of the
barrier or quench fluid employed.
The barrier or quench circuit must undergo forced circulation and / or adequate cool-
ing to carry off heat so that the viscosity of the fluid does not fall below this limit. The
required viscosity of the barrier or quench fluid can be attained by external heating so
that this viscosity limit is not exceeded; this particularly applies when only the ther-
mosiphon effect generates the circulation of the barrier or quench fluid.
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To prevent damages on seal parts FLOWSERVE must be consulted on any devia-
tions with respect to the barrier or quench fluid´s viscosity.