DN25-DN200 GW Type Cast Iron Pipe Sewage Pump

Model NO. PWSGW

Flow Range：5-3000m³/h
Head Range：5~45m
Motor Power：0.75-250kw
Inlet/Outlet Range：DN25-DN200

Quantity

GW Type Cast Iron Pipe Sewage Pump

The PWS GW cast iron sewage pump is specifically designed for transporting wastewater containing solids, fibers, and granular debris. Compared to ejector pumps for sewage that rely on Venturi principles, this sewage pump employs physical cutting and optimized flow channel technology to address critical challenges:

Product Features

Non-Clogging Design
The GW Type Cast Iron Pipe Sewage Pump features a single-channel impeller, enabling it to efficiently pass solids and fibrous materials.,significantly reducing clogging risks compared to traditional Sewage Pumping systems. This design surpasses the capabilities of Ejector pumps for sewage, which often struggle with fibrous materials due to their reliance on high-pressure fluid dynamics.
Vertical and Compact Structure
The pump's vertical design with coaxial inlet and outlet flanges allows direct installation into pipelines, similar to a valve. This compact structure saves space and simplifies maintenance, making it more versatile than Ejector pumps for sewage, which typically require additional plumbing configurations.

Product Advantage

High Efficiency and Energy Savings
Equipped with a well-matched motor and advanced hydraulic model, the GW pump operates efficiently with low noise and significant energy savings. This efficiency outperforms many conventional Sewage Pumping solutions, which may consume more power due to less optimized designs.

Durable and Reliable Mechanical Seal
The mechanical seal is made of hard, corrosion-resistant tungsten carbide, ensuring durability and enabling the pump to run continuously for over 8,000 hours without failure. This reliability is a key advantage over Ejector pumps for sewage, which often have shorter service lives due to wear from abrasive materials.

Feature / Parameter	Vertical In-Line Centrifugal Pump	Vertical Multi-Stage Centrifugal Pump
Number of Impellers	Typically single impeller.	Multiple impellers stacked in series on a vertical shaft.
Head (Pressure) Capability	Low to Medium head. Best suited for systems with lower pressure drops or shorter vertical lifting requirements.	High head & High pressure. Excellent for boosting pressure across high-rise buildings, reverse osmosis, or long-distance piping.
Flow Rate Capacity	Can handle medium to high flow rates depending on the casing and motor size.	Generally designed for low to medium flow rates at high pressures.
Physical Footprint	Extremely compact. Designed to mount directly inline with piping ("pipe-mounted"), saving valuable floor space.	Small footprint vertically, but taller than single-stage pumps. Requires a solid floor foundation or baseplate.

FAQ

1. Can the GW type sewage pump be installed directly into the pipeline?

Answer: Yes. The GW type features an in-line design with suction and discharge ports on the same axis, allowing it to be mounted directly into the piping system like a valve, saving valuable floor space.

2. What types of media is this pump mainly used to transport?

Answer: It is mainly used for conveying wastewater containing solid particles, fibrous impurities, and mildly corrosive industrial liquids. Its cast iron construction provides excellent mechanical strength and wear resistance.

3. What is the main difference between a GW sewage pump and a standard clean water centrifugal pump?

Answer: The main difference lies in the impeller design and anti-clogging capability. Clean water pumps have narrow flow passages that easily clog, whereas the GW sewage pump utilizes a wide-passage or special non-clog impeller to easily pass solids and fibers.

PWS’s Cast Iron Pipe Sewage Pump is engineered for robust sewage pumping in demanding environments, combining heavy-duty cast iron construction with advanced hydraulics to handle solids, sludge, and corrosive wastewater. Key technical parameters are optimized for ejector pumps for sewage in residential sumps, municipal lift stations, or industrial treatment systems.

No.	Model	Caliber (mm)	Flow Rate (m³/h)	Head (m)	Power (kW)	Speed (r/min)	Efficiency (%)
1	25GW8-22-1.1	25	8	22	1.1	2825	38.5
2	32GW12-15-1.1	32	12	15	1.1	2825	40
3	40GW15-15-1.5	40	15	15	1.5	2840	45.1
4	40GW15-30-2.2	40	15	30	2.2	2840	48
5	50GW20-7-0.75	50	20	7	0.75	1390	54
6	50GW10-10-0.75	50	10	10	0.75	1390	56
7	50GW20-15-1.5	50	20	15	1.5	2840	55
8	50GW15-25-2.2	50	15	25	2.2	2840	56
9	50GW18-30-3	50	18	30	3	2880	58
10	50GW25-32-5.5	50	25	32	5.5	2900	53
11	50GW20-40-7.5	50	20	40	7.5	2900	55
12	65GW25-15-2.2	65	25	15	2.2	2840	52
13	65GW37-13-3	65	37	13	3	2880	55
14	65GW25-30-4	65	25	30	4	2890	58
15	65GW30-40-7.5	65	30	40	7.5	2900	56
16	65GW35-50-11	65	35	50	11	2930	60
17	65GW35-60-15	65	35	60	15	2930	63
18	80GW40-7-2.2	80	40	7	2.2	1420	52
19	80GW43-13-3	80	43	13	3	2880	50
20	80GW40-15-4	80	40	15	4	2890	57
21	80GW65-25-7.5	80	65	25	7.5	2900	56
22	100GW80-10-4	100	80	10	4	1440	62
23	100GW110-10-5.5	100	110	10	5.5	1440	66
24	100GW100-15-7.5	100	100	15	7.5	1440	67
25	100GW85-20-7.5	100	85	20	7.5	1440	68
26	100GW100-25-11	100	100	25	11	1460	65
27	100GW100-30-15	100	100	30	15	1460	66
28	100GW100-35-18.5	100	100	35	18.5	1470	65
29	125GW130-15-11	125	130	15	11	1460	62
30	125GW130-20-15	125	130	20	15	1460	63
31	150GW145-9-7.5	150	145	9	7.5	1440	63
32	150GW180-15-15	150	180	15	15	1460	65
33	150GW180-20-18.5	150	180	20	18.5	1470	75
34	150GW180-25-22	150	180	25	22	1470	76
35	150GW130-30-22	150	130	30	22	1470	75
36	150GW180-30-30	150	180	30	30	1470	73
37	150GW200-30-37	150	200	30	37	1480	70
38	200GW300-7-11	200	300	7	11	970	73
39	200GW250-11-15	200	250	11	15	970	74
40	200GW400-10-22	200	400	10	22	1470	76
41	200GW450-13-30	200	450	13	30	1470	73
42	200GW250-15-18.5	200	250	15	18.5	1470	72
43	200GW300-15-22	200	300	15	22	1470	73
44	200GW250-22-30	200	250	22	30	1470	71
45	200GW350-25-37	200	350	25	37	1980	75
46	200GW400-30-45	200	400	30	45	1480	70
47	250GW600-9-30	250	600	9	30	980	74
48	250GW600-12-37	250	600	12	37	1480	78
49	250GW600-15-45	250	600	15	45	1480	75
50	250GW600-20-55	250	600	20	55	1480	73
51	250GW600-25-75	250	600	25	75	1480	73
52	300GW600-12-45	300	600	12	45	900	76
53	300GW500-15-45	300	500	15	45	980	70
54	300GW800-15-55	300	800	15	55	980	73
55	300GW600-20-55	300	600	20	55	980	75
56	300GW800-20-75	300	800	20	75	980	78
57	300GW950-20-90	300	950	20	90	980	80
58	300GW1000-25-110	300	1000	25	110	980	82
59	350GW1100-10-55	350	1100	10	55	980	84.5
60	350GW1500-15-90	350	1500	15	90	980	82.5
61	350GW1200-18-90	350	1200	18	90	980	83.1
62	350GW1100-28-132	350	1100	28	132	740	83.2
63	350GW1000-36-160	350	1000	36	160	740	78.5
64	400GW1500-10-75	400	1500	10	75	980	82.1
65	400GW2000-15-132	400	2000	15	132	740	85.5
66	400GW1700-22-160	400	1700	22	160	740	82.1
67	400GW1500-26-160	400	1500	26	160	740	83.5
68	400GW1700-30-200	400	1700	30	200	740	83.5
69	400GW1800-32-250	400	1800	32	250	740	82.1
70	500GW2500-10-110	500	2500	10	110	740	82
71	500GW2600-15-160	500	2600	15	160	740	83
72	500GW2400-22-220	500	2400	22	220	740	84
73	500GW2600-24-250	500	2600	24	250	740	82

Proper installation of PWS’s Cast Iron Pipe Sewage Pump is critical to ensuring reliable sewage pumping performance in residential, municipal, or industrial systems. Designed for submersion in harsh wastewater environments, these pumps—including ejector pumps for sewage in basement sumps or low-lift applications—require precise alignment, secure piping connections, and corrosion-resistant anchoring to withstand debris, abrasion, and prolonged immersion. This guide provides to optimize installation, balancing factors like submersion depth, discharge angle, and motor protection to maximize operational efficiency and longevity, even in demanding sewage handling scenarios.

GW type series non–clogging single stage pipeline sewage pump is imported and imported on thesame horizontal line, and the specifications are the same, vertical structure, small floor area, motor and pump coaxial, with the installation chassis, easy to install and stable, impeller using single (double) channel, with good performance through.

Products Drawing

Reference Model：GW80-50-10-3

The performance curves of PWS’s Cast Iron Pipe Sewage Pump provide critical data for optimizing sewage pumping operations, mapping flow rates, head pressure, and motor efficiency across debris-laden or high-solids applications. For ejector pumps for sewage in basement sumps or low-lift scenarios, these curves reveal steady efficiency gains at shallow depths and minimal clogging risks.

Reference Product Model: 65GW30-18
Medium: Clear Water
Rated Voltage: 380V
Inlet Diameter: 0.10m
Outlet Diameter: 0.10m
Rated Power: 3kW-2
Water Temperature: 11.0°C
Outlet Gauge Distance: 0.30
Motor Efficiency: 92.4%

PWS’s Cast Iron Pipe Sewage Pump is engineered with durable components optimized for sewage pumping in harsh environments, combining corrosion-resistant cast iron casings with specialized hydraulic parts to handle solids, sludge, and abrasive wastewater. Key components include a vortex impeller designed to minimize clogging in ejector pumps for sewage (ideal for residential sumps or low-lift systems), a wear-resistant mechanical seal to prevent leakage under prolonged immersion, and a submersible motor with thermal overload protection to ensure reliability in demanding sewage handling tasks. Additional features like stainless steel fasteners and non-clog check valves further enhance durability, making these pumps suitable for municipal sewers, industrial treatment plants, or basement drainage systems.

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