Flowserve 2564 Mixerpac - Manual (Page 11)

11
Mixerpac 2564 - Installation and Maintenance Instruction for Machinery Parts
8.7 Frictional heat can be dissipated and deposits around the seal faces prevented only
when adequate circulation is provided for the barrier or quench fluid (e. g. by forced
circulation).
!
At all operating temperatures the barrier or quench fluid must not come within
20 K of its evaporating point. Should this not be the case during certain operat-
ing situations (e. g. mixer shutdown, start-up) forced circulation or adequate
cooling of the barrier or quench circuit must be generated to promote heat
removal.
Temperatures at the housing surfaces of the MIXERPAC correspond to the
operating temperatures of the product, respectively the barrier or quench fluid.
Suitable precautions against contacts are necessary.
8.8 The MIXERPAC is ready for operation of the machine, after the seal support system
is filled with either pressureless quench fluid or if the barrier circuit is pressurized
with 1 - 2 bar higher than the product pressure which needs to be sealed. (see item
1.5).
!
The MIXERPAC will be damaged when the conditions given under item 1.5 are
not maintained.
!
The MIXERPAC operate with unpressurized quench fluid the product-side leak-
age fills the quench circuit when the mixer vessel is flooded with product up to
the seal face. For this reason an adequate overflow protector (e. g. level switch)
must be provided. When the applied product on the product-side seal face is
gaseous, this gas enters the seal support system, too. In both cases a forced
ventilation of the seal support system must be ensured. The leakage of quench
fluid then corresponds in its properties to the composition of the product.
Instructions and regulations concerning safety measures and protec-tive clothing
must be observed and adhered to according to the plant section.
!
Follow the instructions both for start up and re-commissioning of the machine
after a machine breakdown, see items 8.0 to 8.8.
8.9 Possible malfunctions:
SYMPTOM CAUSE
Dramatic loss of
barrier or quench
fluid - Shaft rotates eccentric.
- Pipe connection leaks.
- Defect barrier pressure setting.
- Damage at the mechanical seal
(barrier or quench fluid enters the product vessel).
- Damage at the shaft seal on the atmospheric side
(barrier or quench fluid leaks from connection C).