Downstream Piping; Piping Before And After The Pump - PROCESSTEC ViscoTwin 130 G8 Operation & Maintenance Manual

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2.5.2 Downstream Piping

The max discharge pressure on standard

pumped media. Pump configurations with the largest possible spindle pitch max out between 12 bar and

14 bar. Pumps equipped with the smaller spindle pitches (consult the options table) have a max discharge

pressure of 25 bar (362 psi). The max temperature with standard elastomers is 130° C (266° F).

If the desired discharge pressure can not be met with the

the next larger pump model with a smaller spindle pitch needs to be selected.

For higher discharge pressures and temperatures, please consult

durable pump setup for pressures up to 45 bar (692 psi) and 200° C (390° F). In Chapter 6 "Geek's Corner"

in this manual (see page 105), we detail options for pressures, temperatures, and other demanding

applications. Our customized pumps are engineered for the longevity of the bearings, elastomers,

mechanical seals, and spindles. We can calculate the expected bearing life with optimized configurations

for temperatures up to 180° C.

ViscoTwin

The

pump operates like a hybrid pump between a centrifugal pump and an absolute positive

displacement pump, primarily due to slip between the left and right hand spindles and between the spindles

and the pump housing. Due to this fact bypasses are generally not needed, allowing for a deadzone-free

ViscoTwin

piping arrangement.

principles are applied.

In case the pump is cleaned with an external CIP supply pump for a higher flowrate than the

designed for, the pushing CIP solution will propel the

making a bypass obsolete. The pump will start to spin, even if it is not started. No damage will occur if

correct engineering principles are applied.

Page 28

ViscoTwin

models depends on the pump configuration and the

pumps can be installed in series without a bypass if proper engineering

ViscoTwin

ViscoTwin 130 G8

due to spindle pitch restriction,

Processtec

pump at a relatively low flow restriction,

2. INSTALLATION

Engineering to customize a

ViscoTwin

PROCESSTEC INC. 2022

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