Xylem WTS - Manual (Page 8)

Operating instructions
WTS 102/3-en 6
Speed, Pressure, Temperature
Suitable safety measures must be taken at the plant to ensure that the speed, pressure and
temperature of the pump do not exceed the limit values given. In addition, the pump must be
protected against pressure surges such as can be caused by switching off the plant quickly (e.g. by
non-return valve on the pressure side, flywheel, air vessel).
Protection against running dry
WTS-Pumps in Industrial design with mediumly lubricated slide bearings may not run dry under
any circumstances as this could damage the bearings.
If necessary provide for monitoring devices (e.g. Flow Switch for pure water lubrication) to ensure
a continual flow of lubricant.
Back flow
There is no back stop for the pumping medium fitted in the pump itself. If flow back from the
pressure line into the collecting shaft has to be avoided a suitable non-return valve or something
similar should be attached to the pressure joints.
2. Description
2.1 Model
Block-free non-chokable pump, rod design with drive above the shaft cover.
Design
Open vortex impeller therefore absolutely free flow through the pump casing. Shaft with two or
more bearings, maintenance-free deep groove ball bearing on the drive side. Rod bearings with
bronze bearing bushes and running sleeve of stainless steel. Bearing lubrication through the
pumping medium (if pumping media are pure and non-abrasive) or alternatively through pure
water or grease (if pumping medium is very dirty). Pressure pipe joints are drawn high by the
covering plate.
Please see the Appendix for the sectional drawings and index of parts as well as a scale drawing.
The pump specification shows the characteristic curve, installation length, materials, lubrication
type and motor output.
Example of a Type Specification:
452 WTS 20 E 1104
Shaft pump: Model WTS, installation depth 1,900 mm, hydraulic data according to characteristic
curve 5, industrial design with pure water lubricated sliding bearings, impeller rated diameter 20
cm, standard sealing, cast iron pump components, Motor 11 kW, 4-pole (approx. 1,450 min
-1
).