Instruction Handbook KL
Chapter 1
BA KL V11 en 10/2014 page 1-4
1.7 Operating Restrictions
The progressing cavity pump is a positive displacement pump, which is theoretically capable of
building up an infinitely high pressure. In the event of a pressure line being closed, pressure built up
in this way can reach a multiple of permissible plant pressure values. This may cause serious
damage to plant components and involve a risk of personal injury.
Do not operate against closed shutoff devices!
There is a risk of fracture as well as personal injury!
Secure the pump by means of approved safety devices (excess pressure protection)!
KL 100 – pump with reinforced bearing is only allowed for normal flow direction. (Counter-
clockwise direction). If a clockwise rotation should be required, then only with a maximum
pressure of 1 bars.
Do not use a non-operative pump as a shutoff device! With a shutdown drive unit, any one-sided
pressurisation of the pump may cause to rotate independently. Damage to the pump cannot be
excluded in such cases.
The continuous application of alternating loads on the pump (e.g. motor/generator operation or
right/left-handed rotation) reduces the service life of the pump and the gear unit as a result of
heavy loading of the rotating parts and of the seal and must be avoided.
Comply with all statutory regulations applying to the delivery of dangerous media.
Medium contamination by foreign matter (metal parts, stones, etc.) may cause damage to the
pump elements! Take suitable action to ensure that no foreign matter or particles likely to cause
damage can ingress into the pump!
Comply with all statutory regulations applying to the delivery and storage of hazardous
substances, all local construction supervisory regulations, and any resulting conditions and
restrictions for the operation of eccentric screw pumps (requirements regarding dry-run
protection, drive unit equipment etc.
1.8 Special Safety Notes for Hopper Pumps / open able housings
For taking up the flow medium, the hopper in hopper pumps is open at the top. The hopper pump
has been designed to be fitted into a machine or plant and must not be operated without appropriate
protective devices on the hopper.
Pumps, which are for cleaning purposes designed with an open able housing, must not be used
without appropriate protective devices either.
Pumps that will be driven by a plug-in shaft or quick change units must be only driven in left-hand
direction. The contrariwise direction of rotation will drive out the rotor and plug-in shaft.
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