DN25-DN200 LW Cast Iron Non-clogging Vertical Sewage Pump

Model NO. PWSLW

Flow Range：5-2600m³/h
Head Range：5-60m
Motor Power：0.75-200kw
Inlet/Outlet Range：DN25-DN200

Quantity

LW Cast Iron Non-clogging Vertical Sewage Pump

The PWS LW Cast Iron Sewage Pump is a non-clogging vertical pump engineered for wastewater containing solids , fibers , and mildly corrosive media. Combining European hydraulic design with localized adaptations, it outperforms traditional Liberty sewage pumps in energy efficiency and maintenance intervals , making it ideal for municipal, industrial, and agricultural applications.

Sewage PumpFeature

Non-Clogging Design

The design of large flow channel anti-clogging hydraulic components, such as single-channel or double-channel impellers, is similar to elbows of the same cross-sectional size, with very good flow properties, effectively reducing the risk of clogging.

Vertical Structure

The pump body is a vertical structure, with the inlet and outlet center lines in a straight line, which can be directly installed anywhere in the pipeline, saving space and facilitating installation and maintenance.

Excellent Material

The flow components are made of cast iron, which has good wear resistance and mechanical stability, can withstand certain impact and extrusion, and are suitable for conveying media containing solid particles.

How It Enhances Sewage Sump Pump Performance

Auto-Level Sensing

Optional float switch or control cabinet enables automatic start/stop based on sump pit levels, eliminating manual monitoring.

Motor Protection

Weatherproof motor cover allows outdoor installation (IP68), ideal for flood-prone sewage sump pump scenarios.

Top-Access Modules

Replace impellers/seals in 30 minutes without disconnecting pipes – 50% faster than Liberty pumps.

Rail Mounting System

Slide pump vertically from sump pits via guide rails, avoiding confined space entry risks.

Non-clogging Vertical Sewage Pump VS Submersible Sewage Pump

Comparison Dimension	Non-clogging Vertical Sewage Pump (Dry Installation)	Submersible Sewage Pump (Wet Installation)
Installation & Space	Installed outside the sump in a dry pit or ground-level pump room. Requires dedicated floor or pump room space (though its vertical design saves more space than horizontal pumps).	Completely submerged underwater at the bottom of the sump (installed via auto-coupling system or suspended). Does not occupy ground space or require a dry pump room.
Sensitivity to Solids / Fibers	Long fibers, rags, or bulky debris in wastewater can clog the suction pipe, valves, or impeller inlet if not screened; relies heavily on front-end strainers/screens or integrated cutters/shredders.	Sensitive to long fibers and debris as well; however, if severe clogging occurs underwater, the entire pump must be lifted out of the pit to be cleared, making maintenance more labor-intensive.
Typical Applications	• Municipal or industrial pump stations requiring dry-pit installation and easy routine inspection. • Industrial wastewater processes demanding long service life and frequent maintenance. • Explosion-proof or hazardous zones requiring clear separation between the motor and liquid.	• Septic tanks, basement drainage sumps, and municipal stormwater/sewage pits. • Confined spaces where building a separate dry pump pit is unfeasible. • Temporary emergency drainage and small-scale decentralized lift stations.

FAQ

Q1: Can this pump run dry or operate continuously?
A: It is designed for continuous duty (S1). However, dry running must be avoided to prevent damage to the mechanical seal. Liquid must be present inside the pump casing during operation.

Q2: Can the suction and discharge flange standards be customized?
A: Yes. We can produce flanges standard with ANSI (150LB), DIN (PN10/PN16), JIS, or BS to seamlessly match your local piping system.

Q3: What shaft seal options are available for this series?
A: Standard pumps feature high-grade double mechanical seals (Silicon Carbide vs Silicon Carbide) for leak-free and wear-resistant performance in severe sewage conditions.

PWS’s Cast Iron Non-clogging Vertical Sewage Pump is engineered for heavy-duty sewage pump applications, combining a corrosion-resistant cast iron housing with a vortex impeller designed to pass solids without clogging—critical for sewage sump pump use in basements, lift stations, or municipal systems. Key technical specs include optimized flow rates, discharge head, and submersible motor efficiency, ensuring reliable performance even in abrasive or debris-laden wastewater. This design balances durability, energy savings, and compliance with industry standards, delivering a robust solution for residential, commercial, and industrial sewage management.

No.	Model	Caliber (mm)	Flow Rate (m³/h)	Head (m)	Speed (r/min)	Power (kW)	Efficiency (%)
1	25LW7-8-0.55	25	7	8	2900	0.55	45
2	25LW8-25-1.1	25	8	25	2900	1.1	45
3	32LW8-12-0.75	32	8	12	2900	0.75	48
4	40LW12-15-1.5	40	12	15	2900	1.5	48
5	50LW20-7-0.75	50	20	7	2900	0.75	62
6	50LW10-10-0.75	50	10	10	2900	0.75	54
7	50LW20-15-1.5	50	20	15	2900	1.5	51
8	50LW15-30-2.2	50	15	30	2900	2.2	51
9	50LW17-25-3	50	17	25	2900	3	53
10	50LW25-12-5.5	50	25	12	2900	5.5	49
11	65LW25-15-2.2	65	25	15	2900	2.2	52
12	65LW127-3	65	37	13	2900	3	60
13	65LW25-30-4	65	25	30	2900	4	58
14	80LW40-7-2.2	80	40	7	2900	2.2	50
15	80LW15-15-7.5	80	80	15	1450	7.5	45
16	80LW100-32-18.5	80	100	32	2900	18.5	65
17	80LW40-15-4	80	40	15	2900	4	57
18	80LW65-25-7.5	80	65	25	2900	7.5	56
19	100LW80-20-4	100	80	20	1450	4	62
20	100LW100-35-18.5	100	100	35	2800	18.5	67
21	100LW65-15-5.5	100	65	15	1450	5.5	59
22	100LW100-15-7.5	100	100	15	1450	7.5	70
23	100LW85-20-7.5	100	85	20	1450	7.5	71
24	100LW50-30-11	100	100	20	1450	11	61
25	150LW145-9-7.5	150	145	9	1450	7.5	68
26	150LW200-10-15	150	200	10	1450	15	44
27	150LW180-15-15	150	180	15	1450	15	67
28	150LW180-20-18.5	150	180	20	1450	18.5	74
29	150LW150-26-18.5	150	150	26	1450	18.5	72
30	150LW100-35-22	150	100	35	1450	22	69
31	150LW200-30-37	150	200	30	1450	37	65
32	150LW150-35-37	150	150	35	1450	37	63
33	200LW300-7-11	200	300	7	980	11	75
34	200LW250-11-15	200	250	11	1450	15	72
35	200LW250-15-18.5	200	250	15	1450	18.5	72
36	200LW400-10-22	200	400	10	1450	22	73
37	200LW300-15-22	200	300	15	1450	22	71
38	200LW400-13-30	200	400	13	1450	30	76
39	200LW250-22-30	200	250	22	1450	30	71
40	200LW300-25-37	200	300	25	1450	37	73
41	200LW250-35-45	200	250	35	1450	45	69
42	200LW400-30-55	200	400	30	1450	55	72
43	250LW600-9-30	250	600	9	980	30	78
44	250LW600-12-37	250	600	12	1450	37	76
45	250LW600-15-45	250	600	15	1450	45	71
46	250LW600-20-55	250	600	20	1450	55	73
47	250LW600-25-75	250	600	25	1450	75	71
48	300LW600-12-45	300	600	12	980	45	74
49	300LW460-15-45	300	460	15	1450	45	66
50	300LW400-20-45	300	400	20	1450	45	64
51	300LW600-20-55	300	600	20	1450	55	73
52	300LW800-20-75	300	800	20	1450	75	75
53	300LW950-20-90	300	950	20	1450	90	76
54	300LW950-24-110	300	950	24	1450	110	76
55	350LW1100-10-45	350	1100	10	980	45	85
56	350LW1140-13-75	350	1140	13	980	75	84
57	350LW1200-15-90	350	1200	15	980	90	81
58	350LW1130-18-90	350	1130	18	980	90	83
59	350LW1250-19.5-110	350	1250	19.5	740	110	83
60	350LW1500-20.5-132	350	1500	20.5	740	132	82
61	350LW1500-26-160	350	1500	26	740	160	83
62	400LW1000-9.5-75	400	1000	9.5	740	75	85
63	400LW1690-12-90	400	1690	12	980	90	85
64	400LW2000-13.5-110	400	2000	13.5	980	110	85
65	400LW1700-22-160	400	1700	22	740	160	83.5
66	400LW2000-18.4-160	400	2000	18.4	980	160	85
67	400LW1950-23-185	400	1950	23	980	185	85
68	400LW1980-26-220	400	1980	26	980	220	83
69	400LW1800-32-250	400	1800	32	740	250	82
70	450LW2300-9.5-90	450	2300	9.5	740	90	85
71	450LW2250-11-110	450	2250	11	740	110	85
72	450LW2260-14-132	450	2260	14	740	132	85
73	450LW2200-20-185	450	2200	20	740	185	83
74	450LW2300-25-250	450	2300	25	740	250	83
75	450LW2300-29-280	450	2300	29	740	280	83
76	450LW2100-36-315	450	2100	36	740	315	83
77	500LW2490-10-110	500	2490	10	740	110	85
78	500LW2500-16-160	500	2500	16	740	160	85
79	500LW2490-18.5-185	500	2490	18.5	740	185	85
80	500LW2500-12-132	500	2500	12	740	132	85
81	500LW2400-22-220	500	2400	22	740	220	85
82	500LW2650-24-250	500	2650	24	740	250	85
83	500LW2400-28-280	500	2400	28	740	280	85

PWS’s Cast Iron Non-clogging Vertical Sewage Pump integrates robust components tailored for efficient sewage pump operation in residential, commercial, or municipal systems.. For sewage sump pump applications in basement sumps or lift stations, the pump features a wear-resistant mechanical seal, stainless steel shaft, and IP68-rated motor to ensure longevity under prolonged immersion and abrasive conditions. Additional elements like a non-return check valve and heavy-duty mounting base enhance operational reliability, making this pump ideal for demanding wastewater management tasks.

No. Part Name

1 Motor

2 Extension Shaft

3 Bearing Housing

4 Pump Cover

5 Oil Seal

6 Impeller

7 Impeller Nut

8 Base

9 Bearing Gland

10 Bearing

11 Mechanical Seal Seat

12 Mechanical Seal

13 Key

14 Casing Wear Ring

15 Pump Casing

Proper installation of PWS’s Cast Iron Non-clogging Vertical Sewage Pump is critical to ensuring reliable performance in sewage pump applications, particularly for sewage sump pump systems handling basement drainage, lift stations, or municipal wastewater. Designed to withstand debris-laden and abrasive environments, this pump requires precise alignment, secure piping, and submersion depth calibration to prevent clogging and maximize operational efficiency.

PWS’s Cast Iron Non-clogging Vertical Sewage Pump performance curves provide critical insights for optimizing sewage pump operation in residential, commercial, or municipal systems—particularly for sewage sump pump applications requiring efficient handling of solids-laden wastewater. These curves illustrate the relationship between flow rate and head enabling engineers to select the ideal pump model for basement lift stations, treatment plants, or industrial drainage systems.

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