ZW Self-Priming Sewage Pump

ZW50-20-35 Self-Priming Sewage Pump, 20 m³/h at 35 m

Name: ZW50-20-35 Self-Priming Sewage Pump, 20 m³/h at 35 m
Brand: Haquan
SKU: ZW50-20-35

Model: ZW50-20-35

ZW50-20-35 lifts 20 m³/h to 35 m on 5.5 kW. Footprint and base bolt details for planning the foundation.

Specifications

Flow Rate	20m³/h
Head	35m
Power	5.5kW
Inlet / Outlet Diameter	50 / 40mm
Material	Cast iron (standard); stainless steel on request

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Product Overview

ZW50-20-35 is the strongest of the DN50 models: 20 m³/h at 35 m head on 5.5 kW. With a bigger motor than its neighbours it also has its own base, so here are the points that matter for the foundation.

Overall length 980 mm; base width 390 mm between bolt centres and 450 mm overall.
Shaft centre height 238 mm above the base.
Four Ø18 mm anchor bolt holes.
Weight 150 kg, so plan a hoist or two people with lifting gear.

The catalogue asks for a level foundation. Set the base level, grout it, and only then connect the pipes, supported independently so the pump carries no pipe load.

If 35 m is more than you need, ZW40-20-15 and ZW50-20-12 give the same flow on 2.2 kW.

Technical data

Item	ZW50-20-35
Flow	20 m³/h
Head	35 m
Motor power	5.5 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	DN50 / DN40
Weight	150 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.