English (GB)
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Recheck the coupling clearance and tighten the set
screws on the couplings.
Tightening torques
5. Product introduction
5.1 Applications
Grundfos LSV vertical split-case pumps are typically
used in these applications:
• circulation in heating- and air-conditioning
systems, water condensing and boiler feed
systems
• liquid transfer and pressure boosting in various
industrial systems
• water distribution and water treatment in public
water systems.
5.2 Pumped liquids
The pumps are suitable for pumping clean, thin,
non-aggressive liquids, not containing solid particles
or fibres. Do not pump liquids that will attack the
pump materials chemically.
When pumping liquids with a density and/or viscosity
higher than that of water, the head and flow will be
reduced. Alternatively, use motors with
correspondingly higher outputs.
The stuffing box packing rings or mechanical shaft
seal O-rings chosen must be suitable for the liquid to
be pumped.
Special stuffing box packing rings or shaft seal
O-rings may be required if you use the pump for
pumping treated water:
• at temperatures above 80 °C.
• containing additives to prevent system corrosion,
calcareous deposits, etc. (this may be the case in
heating and ventilating systems).
When pumping liquids other than water, select an
appropriate stuffing box or shaft seal. For further
information, contact Grundfos.
Description Dimensions
Tightening torque
[Nm]
Hexagon
socket set
screws
M6 10 ± 2
M8 12 ± 2.4
M10 23 ± 4.6
M12 40 ± 8
M16 80 ± 16
M20 120 ± 24
M24 120 ± 24
WARNING
Crushing hazard
Death or serious personal injury
- To protect persons from rotating
machine parts, always install coupling
guards after the installation is complete
and before starting the pump.
CAUTION
Hot liquid
Minor or moderate personal injury
- Do not exceed the maximum operating
temperature stated on the nameplate.
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