453261 ISS U 08.2008
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1.1 The Ws+ range
This manual covers the standard version of the Ws+ pump, which is
supplied prefitted with recirculation connection, and a simplified
version, which has no recirculation.
1.2 Selection of the standard or simplified pump
1.
The standard Ws+ pump should be installed as a normal liquid
ring pump, i.e. with a "swan neck" (two x 90° bends) on the inlet
and a length of vertical pipe on the outlet. (See length H on the
next page)
2.
However, in many CIP pump applications it is possible with the
Ws+ pump to simplify the pipe layout and bring the inlet pipe
direct (horizontally) to the pump inlet and (by selecting the
simplified pump) eliminate the recirculation connection. For the
pump to function in this manner there is one condition for the inlet
pipework which must be met, see Section 2.2. If in doubt, the
standard Ws+ with swan neck and recirculation connection must
be used.
1.3 The Ws+ pump, options and extras
The following standard options are available in the Ws+range:
polished to 3A requirements
with or without shroud
with frame and adjustable feet or fixed bracket
with shaft seal in carbon/SiC or SiC/SiC
with Orings in EPDM or FPM (
Viton
) (Kalrez and possibly others)
with singleacting shaft seal or doubleacting shaft seal prepared for
waterflushed shaft seal
with NEMA motor instead of IEC (but not with shroud)
Extras:
drain valve
pump trolley
Ws+pumps can be supplied with all standard welding unions and
pipe couplings specified in DS/BS/DIN/SMS and ISO and DIN
flanges.
1.4 Identifying the pump model
A nameplate as shown in Fig. 1 is fitted on the extension frame.
Example:
Type Ws+20/15: Indicates pump model, here Ws+20/15
125:
Indicates diameter of impeller.
Serial No.:
The “unique” serial number of the pump.
Order No.:
APV's order number.
Year:
Indicates the year of manufacture.
The vacant field can be used to identify the pump in terms of its
posi tion in the plant.
1. Introduction to the Ws+ programme
Fig.1