Flowserve 2564 Mixerpac - Manual (Page 9)

9
Mixerpac 2564 - Installation and Maintenance Instruction for Machinery Parts
7.0 Connecting the Seal Support System
7.1 The MIXERPAC is connected by pipes to a seal support system in accordance with
the specifications from the machine manufacturer. The connecting pipes must be of
rust-free material and have an internal diameter of at least 15 mm.
7.2 First remove the plastic plugs from the connection bores A, B and C of the MIXERPAC,
as well from the connections E and F of the optional installed cooling flange.
The connection on the MIXERPAC and the optional installed cooling flange are
marked accordingly.
7.3 Connect the feed pipe of the seal support system to connection A, the return pipe
to connection B and the atmospheric side leakage pipe to connection C. The cooling
lines are connected at the sites marked E and F respectively on the optional installed
cooling flange.
The required flow rate for the cooling medium depends on the respective operating
conditions. The flow rate should be between 300 and 600 l/h and must allow adjust-
ments in line with the respective operating conditions.
!
Forced ventilation must be ensured when pipes are connected to the connections
A and B. If gas or air bubbles should become trapped in the barrier or quench
fluid chamber, these can collect at the outside diameter of the seal gap when the
mixer starts to rotate. This causes the machine to run dry at the seal gap for an
indefinite period, and the seal faces can become damaged.
!
We recommend monitoring the liquid circulation to maintain the conditions for
correct MIXERPAC operation.
!
Suitable measures must be implemented to prevent errors in the operation of
shut-off and throttling devices installed in the fluid supply.
!
Up to a pressure difference of Δp = 6 bar the MIXERPAC can be run with an
unpressurized quench fluid (no danger of dry friction when the lubricating film
ruptures).
7.4 Slowly fill the MIXERPAC and the seal support system with barrier or quench fluid
through the feed pipe. Carefully vent at the highest site.
7.5 A check can now be conducted on the mixer’s sense of rotation (without pressurized
seal support system).
7.6 The MIXERPAC runs with unpressurized quench fluid the product-side leakage 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.