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ZW32-9-30 Self-Priming Sewage Pump, 30 m Head on 3 kW — ZW Self-Priming Sewage Pump
ZW Self-Priming Sewage Pump

ZW32-9-30 Self-Priming Sewage Pump, 30 m Head on 3 kW

Model: ZW32-9-30

ZW32-9-30 lifts 9 m³/h to 30 m on 3 kW with DN32 flanges. A worked example of checking suction lift before you buy.

Specifications
Flow Rate9m³/h
Head30m
Power3kW
Inlet / Outlet Diameter32 / 32mm
MaterialCast iron (standard); stainless steel on request
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Product Overview

ZW32-9-30 is the high-head option in the DN32 group: 9 m³/h at 30 m on a 3 kW motor. Because it sits above the liquid, the suction side needs as much attention as the discharge.

Check the suction side first

The catalogue gives a self-priming height of 5.5 m for this model and asks for a suction pipe no longer than 10 m. Take a pit where the lowest liquid level is 3.5 m below the pump centre and the suction pipe is 6 m long with one bend. The vertical lift is well inside 5.5 m and the pipe is short, so the pump will prime and run normally.

If the liquid could fall to 6 m below the pump, move the pump lower or choose a submersible sewage pump instead. Self-priming pumps cannot pull liquid beyond their rated lift.

Then the discharge

Add the height from the pump to the outlet point and the pipe losses. If the total is near 30 m, this model fits. Our head calculator helps with the pipe losses.

If your suction line is bigger than DN32, ask for a larger suction port. A wider inlet also helps priming on a long or lifted suction line.

Technical data

Item ZW32-9-30
Flow 9 m³/h
Head 30 m
Motor power 3 kW
Speed 2900 r/min
Efficiency 48 %
NPSHr 2.5 m
Self-priming height 5.5 m
Self-priming time 3 min per 5 m
Suction / discharge DN32 / DN32
Weight 120 kg

Installation dimensions (mm)

The pump, coupling and motor are mounted on a common base. L is the overall length; L1 to L4 are base lengths; a and f locate the outlet; B1 and B2 are the base widths; H is the shaft centre height; h1 and h2 are the heights of the suction and discharge flanges; h3 is the base thickness.

L L1 L2 L3 L4 a f B1 B2 H h1 h2 h3 Base bolts
ZW32-9-30 890 710 130 450 240 260 510 310 370 238 410 630 24 4×Ø18

Flange dimensions (mm)

Flange DN Outer dia. D Bolt circle Raised face Thickness b Face height f Bolts n×d
Suction 32 120 90 70 14 2 4×Ø14
Discharge 32 120 90 70 14 2 4×Ø14

Typical Applications

  • sewage transfer to higher tanks
  • long discharge lines
  • basement and pit drainage

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