The Flow Rate; Intended Use; Reasonably Expected Improper Use - OBL X9 Series Operating Manual

Operating manual
Multiple pumps are obtained by horizontal alignment of individual reduction gear, in which the endless screw shafts are fitted together
by means of a flexible coupling. Each reduction gear has its own frequency of plunger strokes per minute, depending on the own worm
wheel transmission ratio.
5.5

THE FLOW RATE

X9 pumps flow rate is not continuous but pulsating, generated by the alternating movement of the plunger (which deforms the
diaphragm) and the action of the check valve on the pumphead which determine flow direction (see figure 1). Pump flow rate is
adjustable and increases or decreases in direct proportion to the variation of the plunger stroke.
The theoretical flow rate corresponds exactly to the volume described by the movement of the diaphragm. The graphic representation
of its behaviour is a straight line whose course is proportional to the adjustment system setting.
The actual flow rate is inevitably lower than the theoretical flow rate, due to the volumetric efficiency of the pump. It varies depending
on the type and size of the pump, the nature and viscosity of the liquid to be pumped, working pressure, etc. (see figure 2).
Figure 1
Figure 2
5.6

INTENDED USE

X9 positive return hydraulic diaphragm pumps are destined for dosing liquid fluids (flammable, acids, alkaline, solvents, etc.) at ambient
temperature or heated (see "Ambient and design temperature"), suitable for continuous service (24/24 hours of operation).
They can be used for the following applications:
oil and gas extraction plants;
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chemical, petrochemical and power plants;
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food and agribusiness industries;
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pharmaceutical industries;
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water and wastewater treatment;
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in paper mills, on paper production lines;
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detergents production,
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water treatment plants.
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Any other use is considered "IMPROPER USE" and is not allowed. OBL declines all responsibility for any
damage to persons or property and any kind of machine guarantee shall be considered void.
5.7

REASONABLY EXPECTED IMPROPER USE

It is improper to use the X9 pumps as follows:
for dosing products differing from those established during technical/sales negotiation and defined at time of order
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in a corrosive and stagnant atmosphere and closed in a poorly-ventilated location
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dosing in pressure without a pressure gauge installed on the discharge pipeline (see "Discharge pipeline - Pressure gauge")
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powered by means of an inverter or other electronic equipment unless explicitly ordered for this use
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with a motor faster than the original one (different polarity)
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File: UT-4336 – Rev.0 Copyright © - OBL Metering pumps - All rights reserved
X9 Series metering pumps
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