Information On The Suction-Side Installation - ProMinent delta General Operating Instructions

Legend for all hydraulic diagrams

3.3 Information on the suction-side installation

Bends
P_MAZ_0027_SW
Fig. 4
Length of suction line
P_MAZ_0057_SW
Fig. 5
Height difference, suction side
P_MAZ_002_SW
Fig. 6
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Always use bends to curve lines - never angles.
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Maintain the suction line as short as possible.
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The height h (see diagram) may only be smaller than or equal to the
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suction lift of the pump P divided by the density rho of the feed chem‐
ical:
h (in m)≤ P (in mWS) / rho (in g/cm
The height h - see diagram - and the cross-section of the suction line
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must be dimensioned in such a way that the negative pressure cre‐
h
ated during the suction process cannot reach the vapour pressure of
the feed chemical being metered (cavitation!).
That is displayed in extreme cases by the dropping of the fluid level or
by an incomplete reciprocal stroke.
Explanation Icon
Metering pump
Injection valve
Settable back pressure
valve
(also used as a relief
valve)
Multifunctional valve
Shut-off valve
Solenoid valve
Ball retaining valve
Installation, hydraulic
Explanation
Foot valve with filter
meshes
Filter insert
Hopper with float valve
Level switch
Manometer
Filling device
Siphon device
3
)
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