Operating manual
AQUA S.p.A.
ENGLISH
Page 10
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Without a safety valve immediately installed after the discharge valve and in any case before than any other accessory;
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Dosing different product than specifically indicated;
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In corrosive and stagnate atmosphere enclosed in not enough ventilated area;
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Pressure dosing without manometer installed (see Discharge pipe- Manometer)
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Powered by inverter or other electric devices (if not specifically requested for this use)
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With motor faster than original (different poles)
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In potentially explosive areas (if not specifically requested for this use)
FORBI DDEN USE
It has to consider forbidden use PDM pumps in mining plants or under water.
Furthermore it is forbidden:
To use the pumps without Safety devices or with the same tampered or out of order
To Use STANDARD version pumps in ATEX areas!
To use PDM pumps in ATEX version in 0/20
– 1/21 explosive zones!
FLOWRAT E ADJ USTMENT SYSTEM
PDM
pumps flow rate adjustment is continuous and regular and can be modified with pump working or steady. However it’s easier to adjust when the
pump is working, especially for pumps with large plunger diameter.
MANUAL ADJUSTMENT WITH KNOB AND LINEAR VERNIER
Standard version of PDM metering pumps are supplied with manual micrometric adjustment. Thanks to this adjustment is possible to manage the
flow rate in a very precise way with a fixed stroke progress of 1 mm each turn. This means that if the pump stroke is 4mm, you will be able to complete
the entire stroke in 4 complete rounds from 0 to 100% that can be divided in parts thanks to numbers on the knob.
TECHNICAL DATA
