ZW/ZWL Non-Clogging Self-Priming Sewage Pump Industrial

ZW/ZWL Non-Clogging Self-Priming Sewage Pump Industrial

ZW/ZWL Non-Clog Self-Priming Sewage Pump

  • Self-priming sewage pump for municipal, industrial & flood control with flow 8–800 m³/h, head 12–80 m, power 2.2–55 kW
  • No foot valve required: Fast self-priming startup after initial fill
  • Large-passage impeller: Handles solids & long fibers without clogging
  • Oil-chamber mechanical seal: Reliable protection for continuous-duty operation
  • Compact easy-access design: Quick maintenance and parts replacement
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Product Overview

ZW / ZWL Non-Clogging Self-Priming Sewage Pump is a horizontal, self-priming centrifugal pump with non-clog impeller design, developed for solid-laden wastewater transfer without external priming systems.

It solves priming difficulties and clogging risks in sewage handling systems where intermittent operation or fluctuating liquid levels occur.

It is suitable for municipal drainage stations, industrial wastewater pits, emergency flood control, and mobile pumping applications.

✔ For solid-content, intermittent-duty, or suction-lift sewage systems, confirm required suction height and particle size before model selection.

Model Designation

ZWZWL Non Clogging Self Priming Sewage Pumptype

Applications

  • Sewage collection pits with fluctuating liquid levels
  • Industrial wastewater transfer containing suspended solids
  • Emergency flood drainage and municipal stormwater removal
  • Construction site dewatering with solid impurities
  •  Agricultural irrigation water with debris content

Engineering Advantages

  •  Integrated self-priming chamber structure enables rapid air-liquid separation and reliable suction lift capability.
  • Semi-open non-clog impeller reduces blockage risk under solid-laden conditions.
  • Short axial structure and rigid shaft support improve operational stability under intermittent duty.
  • Replaceable wear components (seal rings, impeller) facilitate maintenance in sewage environments.
  • Hydraulic design balances suction performance and solid-passing capacity for stable wastewater transfer.
✔ The ZW / ZWL pump integrates self-priming structure and non-clog hydraulic design to ensure reliable sewage handling without auxiliary vacuum systems.

System Components

ZW / ZWL Non-Clogging Self-Priming Sewage Pump mainly includes:

  • Pump casing with self-priming chamber
  • Non-clog impeller
  • Mechanical seal assembly
  • Shaft and bearing support assembly
  • Suction and discharge flanges
  • Base frame and motor coupling system

Technical Specifications

Service Conditions

  • Suitable for sewage or wastewater containing solid particles and fibers within allowable limits.
  • Installation environment should be ventilated and protected against flooding beyond pump capacity.

Operating Conditions

  • Flow rate: 8–800 m³/h
  • Head: 12–80 m
  • Power range: 2.2–55 kW
  • Speed: 1450 / 2900 rpm
  • Liquid temperature: ≤ 60°C
  • Working pressure: ≤ 1.0 MPa (standard), up to 1.6 MPa available on request

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

ZWZWL Non Clogging Self Priming Sewage Pumptypejiegoutu 1

Performance Data

No.
Name
No.
Name
1
Inlet Pipe
9
Impeller
2
Inlet Flange
10
Mechanical Seal
3
Inlet Valve Seat
11
Water Blocking Ring
4
Priming Valve
12
Bearing Seat
5
Outlet Pipe
13
Pump Shaft
6
Pump Body
14
Bearing Cover
7
Air-Liquid Separator Tube
15
Bottom Cover Plate
8
Rear Cover
16
Bolt

Performance Parameters

Model
Flow Rate (m³/h)
Head (m)
Motor Power (kW)
Speed (rpm)
Efficiency (%)
NPSHr (m)
(m3/h)
(M)
(kw)
(r/min)
(%)
(M)
ZWL25-8-15
8
15
2.2
2900
45
2
ZWL32-10-20
10
20
2.2
2900
45
2.5
ZWL40-20-15
20
15
2.2
2900
45
2.5
ZWL40-15-30
15
30
3
2900
48
2.5
ZWL50-10-20
10
20
2.2
2900
45
2.5
ZWL50-20-15
20
15
2.2
2900
45
2.5
ZWL50-18-22
18
22
3
2900
48
2.5
ZWL50-15-30
15
30
3
2900
48
2.5
ZWL65-30-18
30
18
4
2900
45
2.5
ZWL65-20-30
20
30
5.5
2900
45
2.5
ZWL65-25-40
25
40
7.5
2900
50
3
ZWL80-40-16
40
16
4
1450
50
3
ZWL80-65-25
65
25
7.5
2900
50
3
ZWL80-80-35
80
35
15
2900
45
3
ZWL80-50-60
50
60
22
2900
55
3
ZWL80-80-45
80
45
22
2900
55
3
Model
Flow Rate (m³/h)
Head (m)
Motor Power (kW)
Speed (rpm)
Efficiency (%)
NPSHr (m)
(m3/h)
(M)
(kw)
(r/min)
(%)
(M)
ZWL100-80-20
80
20
7.5
1450
53
4
ZWL100-100-15
100
15
7.5
1450
50
4
ZWL100-100-20
100
20
11
1450
53
4
ZWL100-100-30
100
30
22
2900
53
4
ZWL100-80-45
80
45
30
2900
55
4
ZWL100-80-60
80
60
37
290
53
4
ZWL100-80-80
80
80
45
2900
50
4
ZWL125-120-20
120
20
15
1450
55
4.5
ZWL150-200-15
200
15
15
1450
60
5
ZWL150-200-20
200
20
22
1450
60
5
ZWL150-200-28
200
28
30
1450
65
5
ZWL150-400-25
400
25
55
1450
45
5
ZWL150-180-40
180
40
55
1450
65
5
ZWL200-280-12
280
12
22
1450
62
5
ZWL200-300-18
300
18
37
1450
59
5
ZWL200-300-25
300
25
45
1450
55
5
ZWL200-280-28
280
28
55
1450
61
5
ZWL250-400-22
400
22
55
1450
65
5
ZWL300-800-14
800
14
55
1450
61
5

How to Select a Pump Model

  • Determine required suction lift and verify it is within allowable self-priming capability.
  • Confirm maximum particle size and solid concentration in the medium.
  • Select flow and head ensuring duty point falls within stable hydraulic region.
  • Verify installation type (fixed station or mobile unit).
  • Consider standby configuration for critical drainage systems.
✔ For sewage systems with variable liquid levels and solids content, selection must prioritize suction performance and anti-clogging capacity.

Engineering Notes

  • Not suitable for high-viscosity sludge beyond hydraulic design limits.
  • Extended suction pipelines require airtight sealing to maintain priming reliability.
  • Long shutdown periods may require re-priming inspection before restart.
  • Check valve installation is recommended to prevent reverse flow.

Compliance & Quality Assurance

  • Factory hydraulic performance testing
  • Casing hydrostatic pressure test
  • Impeller dynamic balance inspection
  • Shaft alignment and vibration verification
  • Material traceability documentation

Safety Notice

  • Do not operate under dry-running condition
  • Ensure suction system is airtight before startup
  • Disconnect power before maintenance
  • Do not exceed rated discharge pressure

OEM & Customization

This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.

  • Available options include:
  • Motor voltage & frequency
  • Mechanical seal type and configuration
  • Wetted parts material selection
  • Surface coating and corrosion protection

Configuration is determined based on duty point and project specifications.

FAQs

  • Q: Can the pump operate under VFD control?
    A: Yes, within rated hydraulic and suction performance limits.
  • Q: What is the maximum allowable solid size?
    A: Depends on model size and impeller passage; confirm per performance table.
  • Q: What sealing options are available?
    A: Mechanical seal is standard; packing seal optional.
  • Q: What is the allowable suction lift?
    A: Maximum suction lift depends on installation conditions and priming structure.
  • Q: Is it suitable for continuous duty?
    A: Yes, provided solids content remains within design limits.
  • Q: What working pressure is permitted?
    A: Maximum working pressure is 1.6 MPa.