GWP sewage pump with non-clogging design

GWP/GW Series Vertical In-Line Sewage Pump

Model NO. GWP/GW Series Vertical In-Line Sewage Pump

Pump Material: Cast Iron, Stainless Steel

Inlet & Outlet Size: DN25 - DN500

Flow Range: 8 - 2600 m³/h

Head Range: 7 - 60 m

Motor Power: 0.75 - 250 kW

Speed: 740 - 2930 r/min

Voltage: 220V / 380V / 415V / 440V /460V

What is GWP/GW Series Vertical In-Line Sewage Pump？

Engineered for reliable wastewater management, the GWP/GW series operates as a high-efficiency effluent pump built upon the advanced hydraulic design of WQ models. Serving as a crucial component in any modern sewage pump system, this unit features excellent energy savings, anti-winding capabilities, and non-clogging performance to easily handle wastewater containing solid particles and long fibers. Whether integrated into municipal networks or functioning as a heavy-duty septic system pump, it guarantees continuous fluid transfer without clogging risks.

To achieve maximum efficiency, this effluent pump utilizes a single or double-channel impeller with smooth curvature, paired with an advanced mechanical seal assembly. Balanced dynamically alongside an optimized volute casing, the entire sewage pump system runs with minimal vibration and smooth hydraulic passage. Installing this septic system pump into existing pipelines helps maintain stable pressure and prevents blockages during continuous duty.

Product Features

Vertical In-Line Design: Designed as a single-stage, single-suction centrifugal effluent pump with identical inline flanges on the same horizontal centerline. It installs direct-in-line like a valve, saving floor area and simplifying piping layout.
Compact & Coaxial Structure: The motor and sewage pump system hydraulics share a direct coaxial shaft, providing exceptional structural rigidity and compact installation dimensions.
Large Solid Passing Capacity: Built for heavy-duty waste handling, this septic system pump passes long fibers up to 5 times the discharge diameter and solid debris up to 50% of the pump size.
High Efficiency & Quiet Operation: Perfectly matched motor characteristics and optimized flow paths allow this effluent pump to deliver high fluid turnover while reducing ambient operational noise.
Tungsten Carbide Mechanical Seal: Fitted with wear-resistant tungsten carbide seals to ensure the sewage pump system provides over 8,000 hours of safe, uninterrupted service under normal conditions.
Weather-Resistant Outdoor Setup: Equipped with a protective motor fan cover, this septic system pump can operate directly outdoors without requiring a dedicated pump shelter, cutting civil infrastructure costs.
Motor Overload Protection: Stable power consumption within the specified operating head range prevents motor overload across varying flow conditions in the effluent pump.

Applications

Industrial & Commercial Wastewater: Discharge of heavily polluted industrial and commercial wastewater.
Sewage Treatment Plants: Drainage systems for municipal sewage treatment plants.
Residential Areas: Sewage discharge and drainage stations in residential communities.
Civil Air Defense Systems: Drainage stations for underground defense facilities.
Hospitals & Hotels: Sewage discharge for hospitals, hotels, and commercial buildings.
Municipal & Construction: Drainage for municipal engineering and construction sites.
Mining & Exploration: Supporting auxiliary equipment for mining and exploration projects.
Agriculture & Biogas: Rural biogas digesters and farmland irrigation.
Water Plants: Water supply systems for tap water plants.

Operating Conditions

Medium Conditions: Medium temperature ≤ 60°C, liquid density 1.0–1.3 kg/dm³, pH value range 5–9.
Ambient Conditions: Ambient temperature ≤ 40°C, altitude ≤ 1000 m, relative humidity ≤ 95%.
Head Range: The pump must operate within the rated head range to prevent motor overload. If operation across the full head range is required, please specify when ordering.
Motor Current: Operating current must not exceed the rated current of the motor.

Structure

vertical in-line sewage pump explored picture

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

Q1: How does the GWP/GW sewage pump design prevent clogging when handling solid-laden wastewater?

The GWP/GW series features an optimized non-clogging single/double-vane impeller design combined with a wide pump casing flow path. This structure allows solid particles, fibrous matter, and long textiles (up to 3 times the discharge diameter for fibers) to pass smoothly without wrapping around the impeller or choking the hydraulic passage.

Q2: What is the main structural advantage of a vertical in-line sewage pump over submersible pumps in above-ground installations?

As a dry-installed vertical in-line pump, the GWP/GW can be mounted directly into horizontal wastewater pipelines like a valve. It completely eliminates the need for submersible sumps, lifting chains, or guide-rail systems, allowing easy motor access, routine inspection, and mechanical seal servicing without touching submerged sludge.

Q3: How do I select between Cast Iron and Stainless Steel for different sewage and wastewater media?

Cast Iron: Ideal for untreated municipal sewage, residential wastewater, rainwater drainage, and non-corrosive industrial effluents.

Stainless Steel (304/316): Essential for corrosive industrial wastewater, chemical plant drainage, food processing effluents, and acidic or alkaline liquid transfer where corrosion resistance is paramount.

Q4: Is the GWP/GW series self-priming, and what are the mounting requirements for lift-station applications?

No, it is a non-self-priming centrifugal pump. In lift-station or pit drainage applications, the pump must be installed with flooded suction (below the liquid level in the basin) or paired with an external vacuum/priming system to ensure the casing remains full of fluid prior to startup.

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