IV – Applica ions
IV.1 – Chemical compa ibili y
Wetted parts are manufactured from PT E and P A and are suitable for pumping even the most
corrosive concentrated chemicals: H
2
SO
4
, HNO
3
, H , H
3
PO
4
, HCl, NH
4
OH, KOH, NaOH, CH
3
COOH,
TMAH, H
2
O
2
...
The viscosity of the liquids must be less 50 cPo
Very abrasive liquids and liquids that crystallize, are not recommended.
Please call SGPPL if you require information on chemical compatibility.
IV.2 – Tempera ure range
The pump can handle liquids from 41 ° to 180 ° (5 °C to 82 °C).
When the fluid temperature is greater than 140 ° (60 °C) you must check from time to time that the
delivery/suction manifold nuts are fully tight.
or special applications call SGPPL or your local distributor.
IV.3 – Cleaning
The plastic design of the MDP 50 pump wetted parts allows the use of any cleaning materials.
When flushing the pump, it is better to adjust it for maximum flow per stroke.
IV.4 – Single s roke adjus men
To adjust the stroke, please proceed as follows:
1) Check fluid connections,
2) Prime the pumps until the fluid line is full (no more air bubbles visible in suction and discharge
line). It is recommended to adjust the stem to the maximum stroke.
3) Check the delivered volume of liquid with a calibrated beaker, test tube or a precision balance to
calculate the single stroke.
4) If unit stroke is not as required, screw on the adjustable stem to reduce the stroke, or unscrew it to
increase the volume.
5) Repeat the stroke until you get the required volume of liquid per shot.
6) When the adjustment is achieved lock the position of the adjustable stem with the lock nut.
Now, your pump is ready to run.
CAUTION: if you modify air pressure and/or air flow rate after adjustment, this will affect the stroke
volume.
Once you have reached the required stroke, the stroke volume is repeatable to +/- 1%.
Nevertheless, we recommend checking the stroke volume regularly, especially if external conditions
are varying (backpressure, suction head, temperature, fluid...)
IV.5 – Limi a ions of use
To ob ain he bes resul s from your pump, you should no :
• Opera e he pump ou side pressure ranges
• Res ric suc ion side (valves, fil ers...),
• Connec he pump inle wi h liquid under pressure,
• Exceed he maximum or minimum empera ure limi s,
• Pump oo viscous or abrasive liquids,
• Try o adjus he uni s roke beyond he specified range
• Exceed he pumping speed
• Forge o respec connec ion specifica ions (see encl. diagrams).