DN50-DN200 QW Stainless Steel Submersible Sewage Pump

Model NO. PWSQW

Flow Range：5~400 m³/h
Head Range：7-60m
Motor Power：0.75~110 kW
Inlet/Outlet Range：DN50-DN200
Diving Depth：≤10 m

Quantity

PWS Stainless Steel Submersible Sewage Pump

The PWS Stainless Steel Submersible Sewage Pump is a robust, corrosion-resistant pumping solution designed for efficient handling of wastewater containing solids, fibers, and sludge. Engineered with premium stainless steel (e.g., 304/316L), it excels in harsh environments, offering durability and longevity in municipal, industrial, and residential applications. Unlike conventional pumps, its submersible design eliminates the need for above-ground infrastructure, saving space and installation costs. With features like large-passage impellers to prevent clogging and intelligent protection systems for safe operation, it rivals specialized ejector pumps for sewage, including models like the Liberty Sewage Ejector Pump, in reliability and performance. Ideal for basements, sewage treatment plants, and demanding drainage tasks, this pump ensures seamless, low-maintenance wastewater management.

Why Choose Submersible Sewage Pump for Your Project

Compact Structure and Easy Installation

The motor and pump share the same shaft, with a compact structure and small volume, and can directly work underwater without the need to build a pump room, reducing project costs. The dual rail automatic coupling installation system makes installation and maintenance more convenient.

High Reliability and Long Lifespan

The stainless steel material and wear-resistant sealing design ensure long-term stable operation of the equipment in harsh environments, with a service life of over 10 years. The mechanical seal adopts a dual channel series seal, made of hard and wear-resistant tungsten carbide or silicon carbide, effectively preventing leakage and reducing maintenance requirements.

Low Maintenance Cost and Convenient Operation

The automatic coupling installation system simplifies the installation and maintenance process, eliminating the need for personnel to enter the sewage pit and reducing manual intervention and safety risks. Reliable sealing reduces the risk of leakage, avoids equipment damage and environmental pollution caused by leaks, and further lowers maintenance costs

What Are the Key Features of Submersible Pump

Corrosion Resistant Materials and Efficient Sealing

Made of stainless steel (such as 304, 316, 316L), it has excellent corrosion resistance and is particularly suitable for acidic, alkaline, or saline wastewater environments. The mechanical seal adopts a dual channel series design, made of hard and wear-resistant tungsten carbide or silicon carbide, to ensure sealing reliability, prevent leakage, and extend equipment service life.

Anti Clogging and Efficient Hydraulic Design

Anti clogging hydraulic components in large flow channels can reduce the risk of entanglement and blockage. The impeller adopts a single or double channel structure to further enhance the passing capacity and is suitable for high solid content wastewater.

Intelligent Protection and Convenient Installation

Built in overheat protector to prevent motor damage caused by overheating. Optional fully automatic safety protection control cabinet, real-time monitoring of faults such as water leakage, electric leakage, overload, and overheating. The dual rail automatic coupling installation system simplifies the installation and maintenance process, eliminating the need for personnel to enter the sewage pit.

Submersible Sewage Pump Vs Sewage Pump

Comparison Dimension	Submersible Sewage Pump	Standard / Dry-Mounted Pump
1. Installation & Space	Fully Submerged Installation: Installed directly at the bottom of the wet well, requiring no dedicated dry pump room and saving valuable floor space.	Must be installed in a dry surface room; requires high civil construction costs and a larger footprint.
2. Flooding & Safety	High Sealing (IP68): The motor is hermetically sealed, allowing it to operate normally even if completely flooded, with no risk of motor burnout from water ingress.	Vulnerable to flooding; if the dry room accidentally floods, the motor is easily damaged.
3. Noise & Cooling	Quiet Operation: Utilizes the surrounding water and pit walls for natural sound insulation and cooling, resulting in very low noise and vibration.	Relies on an external motor cooling fan and may require extra vibration isolation and acoustic measures.
4. Maintenance Access	Lifting Required for Service: Technicians must hoist the pump out of the wastewater using guide rails and lifting chains, meaning maintenance involves contact with wastewater.	Clean Dry Maintenance: Located in a dry environment, allowing technicians to service the equipment without contacting sewage.

FAQ

Q1: What grade of stainless steel is used for this pump?

A: We offer SS304, SS316, and SS316L options to suit different levels of corrosive media, chemical wastewater, or seawater applications.

Q2: What length of power cable is supplied as standard?

A: Standard cable length is 7 meters. Custom cable lengths can be provided based on your site requirements.

Q3: Can this pump be installed with an auto-coupling system?

A: Yes. It supports both portable hose connection installation and automatic coupling system installation for easy lifting and maintenance.

The QW Stainless Steel Submersible Sewage Pump delivers superior wastewater handling with direct submersion capability. It eliminates complex piping and pressurized systems required by traditional ejector pumps for sewage, while outperforming Liberty sewage ejector pump models in corrosion resistance. As a heavy-duty submersible sewage pump, it handles challenging solids without clogging.

No	Model	Diameter (mm)	Flow (m³/h)	Head (m)	Speed (r/min)	Power (kW)	Efficiency (%)	Weight (kg)	Pump Electrical Control Cabinet	Auto Coupling	Operating Head Range
1	25WQ8-22-1.1	25	8	22	2825	1.1	38.1	42	QZD-1.1	GAK-25	10-22
2	32WQ12-15-1.1	32	12	15	2825	1.1	40	42	QZD-1.1	GAK-32	8-15
3	40WQ15-15-1.5	40	15	15	2840	1.5	45.1	52	QZD-1.5	GAK-50	6-15
4	40WQ15-30-2.2	40	15	30	2840	2.2	48	55	QZD-2.2	GAK-50	15-30
5	50WQ20-7-0.75	50	20	7	1390	0.75	54	50	QZD-0.75	GAK-50	3-7
6	50WQ10-10-0.75	50	10	10	1390	0.75	56	50	QZD-0.75	GAK-50	4-10
7	50WQ12-15-1.5	50	12	15	2840	1.5	55	55	QZD-1.5	GAK-50	6-15
8	50WQ15-15-1.5	50	15	15	2840	1.5	55	55	QZD-1.5	GAK-50	6-15
9	50WQ18-15-1.5	50	18	15	2840	1.5	55	55	QZD-1.5	GAK-50	6-15
10	50WQ20-15-1.5	50	20	15	2840	1.5	55	55	QZD-1.5	GAK-50	6-15
11	50WQ25-10-1.5	50	25	10	2840	1.5	55	55	QZD-1.5	GAK-50	4-10
12	50WQ15-22-2.2	50	15	22	2840	2.2	56	60	QZD-2.2	GAK-50	10-22
13	50WQ15-25-2.2	50	15	25	2840	2.2	56	60	QZD-2.2	GAK-50	10-25
14	50WQ20-15-2.2	50	20	15	2840	2.2	56	60	QZD-2.2	GAK-50	6-15
15	50WQ27-15-2.2	50	27	15	2840	2.2	56	60	QZD-2.2	GAK-50	6-15
16	50WQ42-9-2.2	50	42	9	2900	2.2	56	60	QZD-2.2	GAK-50	4-9
17	50WQ18-30-3	50	18	30	2880	3	58	70	QZD-3	GAK-50	15-30
18	50WQ25-22-4	50	25	22	2900	4	58	80	QZD-4	GAK-50	10-22
19	50WQ25-32-5.5	50	25	32	2900	5.5	53	100	QZD-5.5	GAK-50	17-32
20	50WQ20-40-7.5	50	20	40	2900	7.5	55	110	QZD-7.5	GAK-50	20-40
21	50WQ30-30-7.5	50	30	30	2900	7.5	56	110	QZD-7.5	GAK-50	15-30
22	65WQ20-15-2.2	65	20	15	2840	2.2	53	60	QZD-2.2	GAK-65	6-15
23	65WQ25-15-2.2	65	25	15	2840	2.2	52	60	QZD-2.2	GAK-65	6-15
24	65WQ40-10-2.2	65	40	10	2900	2.2	53	60	QZD-2.2	GAK-65	4-10
25	65WQ37-13-3	65	37	13	2880	3	55	70	QZD-3	GAK-65	6-13
26	65WQ25-27-4	65	25	27	2890	4	57	85	QZD-4	GAK-65	12-27
27	65WQ25-30-4	65	25	30	2890	4	58	85	QZD-4	GAK-65	15-30
28	65WQ40-15-4	65	40	15	2890	4	56	85	QZD-4	GAK-65	6-15
29	65WQ15-50-7.5	65	15	50	2900	7.5	57	110	QZD-7.5	GAK-65	35-50
30	65WQ30-40-7.5	65	30	40	2900	7.5	56	110	QZD-7.5	GAK-65	20-40
31	65WQ35-50-11	65	35	50	2930	11	60	200	JJ1-11	GAK-65	35-50
32	65WQ35-60-15	65	35	60	2930	15	63	230	JJ1-15	GAK-65	40-60
33	80WQ40-7-2.2	80	40	7	1420	2.2	52	75	QZD-2.2	GAK-80	3-7
34	80WQ43-13-3	80	43	13	2880	3	50	85	QZD-3	GAK-80	5-13
35	80WQ50-10-3	80	50	10	2880	3	50	85	QZD-3	GAK-80	4-10
36	80WQ40-15-4	80	40	15	2890	4	57	90	QZD-4	GAK-80	6-15
37	80WQ60-13-4	80	60	13	2890	4	56	90	QZD-4	GAK-80	6-13
38	80WQ45-22-5.5	80	45	22	2900	5.5	56	125	QZD-5.5	GAK-80	10-22
39	80WQ50-18-5.5	80	50	18	2900	5.5	55	125	QZD-5.5	GAK-80	8-18
40	80WQ50-25-7.5	80	50	25	2900	7.5	56	135	QZD-7.5	GAK-80	10-25
41	80WQ65-25-7.5	80	65	25	2900	7.5	56	135	QZD-7.5	GAK-80	12-25
42	100WQ80-10-4	100	80	10	1440	4	62	130	QZD-4	GAK-100	4-10
43	100WQ30-22-5.5	100	30	22	1440	5.5	64	155	QZD-5.5	GAK-100	10-22
44	100WQ65-15-5.5	100	65	15	1440	5.5	65	155	QZD-5.5	GAK-100	6-15
45	100WQ110-10-5.5	100	110	10	1440	5.5	66	155	QZD-5.5	GAK-100	5-10
46	100WQ80-15-7.5	100	80	15	1440	7.5	68	175	QZD-7.5	GAK-100	6-15
47	100WQ100-15-7.5	100	100	15	1440	7.5	67	170	QZD-7.5	GAK-100	8-15
48	100WQ85-20-7.5	100	85	20	1440	7.5	68	170	QZD-7.5	GAK-100	10-20
49	100WQ100-25-11	100	100	25	1460	11	65	270	JJ1-11	GAK-100	10-25
50	100WQ100-30-15	100	100	30	1460	15	66	300	JJ1-15	GAK-100	12-30
51	100WQ100-35-18.5	100	100	35	1470	18.5	65	380	JJ1-18.5	GAK-100	15-35
52	125WQ130-15-11	125	130	15	1460	11	62	380	JJ1-11	GAK-125	7-15
53	125WQ130-20-15	125	130	20	1460	15	63	300	JJ1-15	GAK-125	10-20
54	150WQ145-9-7.5	150	145	9	1440	7.5	63	180	QZD-7.5	GAK-150	4-9
55	150WQ180-15-15	150	180	15	1470	15	65	280	JJ1-15	GAK-150	5-15
56	150WQ180-20-18.5	150	180	20	1470	18.5	75	400	JJ1-18.5	GAK-150	8-20
57	150WQ180-25-22	150	180	25	1470	22	76	430	JJ1-22	GAK-150	12-25
58	150WQ130-30-22	150	130	30	1470	22	75	450	JJ1-22	GAK-150	15-30
59	150WQ180-30-30	150	180	30	1470	30	73	500	JJ1-30	GAK-150	15-30
60	150WQ200-30-37	150	200	30	1480	37	70	600	JJ1-37	GAK-150	15-30
.61	150WQ160-45-37	150	160	45	1450	37	65	650	JJ1-37	GAK-150	20-45
62	200WQ300-7-11	200	300	7	970	11	73	450	JJ1-11	GAK-200	15-30
63	200WQ250-11-15	200	250	11	970	15	74	400	JJ1-15	GAK-200	4-11
64	200WQ400-10-22	200	400	10	1470	22	76	450	JJ1-22	GAK-200	5-10
65	200WQ400-13-30	200	400	13	1470	30	73	650	JJ1-30	GAK-200	6-13
66	200WQ250-15-18.5	200	250	15	1470	18.5	72	500	JJ1-18.5	GAK-200	7-15
67	200WQ350-15-22	200	350	15	1470	22	73	550	JJ1-22	GAK-200	8-15
68	200WQ250-22-30	200	250	22	1470	30	71	800	JJ1-30	GAK-200	12-22
69	200WQ350-25-37	200	350	25	1480	37	75	850	JJ1-37	GAK-200	10-25
70	200WQ380-28-45	200	380	28	1450	45	70	920	JJ1-45	GAK-200	13-28
71	200WQ400-30-55	200	400	30	1480	55	70	1000	JJ1-55	GAK-200	13-30
72	200WQ350-40-75	200	350	40	1450	75	68	1000	JJ1-75	GAK-200	20-40
73	250WQ600-9-30	250	600	9	980	30	74	850	JJ1-30	GAK-250	3-9
74	250WQ600-12-37	250	600	12	1480	37	78	850	JJ1-37	GAK-250	5-12
75	250WQ600-15-45	250	600	15	1480	45	75	950	JJ1-45	GAK-250	6-15
76	250WQ600-20-55	250	600	20	1480	55	73	1300	JJ1-55	GAK-250	8-20
77	250WQ600-25-75	250	600	25	1480	75	73	1500	JJ1-75	GAK-250	12-25
78	300WQ800-12-45	300	800	12	1480	45	76	1500	JJ1-45	GAK-300	5-12
79	300WQ500-15-45	300	500	15	980	45	70	1500	JJ1-45	GAK-300	7-15
80	300WQ800-15-55	300	800	15	980	55	73	1550	JJ1-55	GAK-300	8-15
81	300WQ600-20-55	300	600	20	980	55	75	1550	JJ1-55	GAK-300	10-20
82	300WQ800-20-75	300	800	20	980	75	78	1600	JJ1-75	GAK-300	12-20
83	300WQ950-20-90	300	950	20	980	90	80	1700	JJ1-90	GAK-300	11-20
84	300WQ1000-25-110	300	1000	25	980	110	82	2000	JJ1-110	GAK-300	12-25
85	300WQ800-32-110	300	800	32	1450	110	76	2000	JJ1-110	GAK-300	16-32
86	350WQ1100-10-55	350	1100	10	980	55	84.5	1380	JJ1-55	GAK-350	4-10
87	350WQ1500-15-90	350	1500	15	980	90	82.5	2000	JJ1-90	GAK-350	6-15
88	350WQ1200-18-90	350	1200	18	980	90	83.1	2000	JJ1-90	GAK-350	8-18
89	350WQ1100-28-132	350	1100	28	740	132	83.2	2520	JJ1-132	GAK-350	15-25
90	350WQ1000-36-160	350	1000	36	740	160	78.5	2880	JJ1-160	GAK-350	20-36
91	400WQ1500-10-75	400	1500	10	980	75	82.1	1750	JJ1-75	GAK-400	3-10
92	400WQ2200-9-110	400	2200	9	980	110	80	2100	JJ1-110	GAK-400	3-9
93	400WQ2000-15-132	400	2000	15	740	132	85.5	2520	JJ1-132	GAK-400	6-15
94	400WQ1700-22-160	400	1700	22	740	160	82.1	2880	JJ1-160	GAK-400	10-22
95	400WQ1500-26-160	400	1500	26	740	160	83.5	2880	JJ1-160	GAK-400	12-36
96	400WQ1700-30-200	400	1700	30	740	200	83.5	3850	JJ1-200	GAK-400	15-30
97	400WQ1800-32-250	400	1800	32	740	250	82.1	4690	JJ1-250	GAK-400	17-32
98	400WQ1760-7.5-55	400	1760	7.5	580	55	82.3	2000	JJ1-55	GAK-400	4-7.5
99	500WQ2500-10-110	500	2500	10	740	110	82	2100	JJ1-110	GAK-500	2-10
100	500WQ2600-15-160	500	2600	15	740	160	83	2280	JJ1-160	GAK-500	4-15
101	500WQ3000-15-200	500	3000	15	740	200	82	2250	JJ1-200	GAK-500	8-15
102	500WQ2400-22-220	500	2400	22	740	220	84	2350	JJ1-220	GAK-500	8-22
103	500WQ4000-15-250	500	4000	15	980	250	84	2650	JJ1-250	GAK-500	8-15
104	500WQ2600-24-250	500	2600	24	740	250	82	2650	JJ1-250	GAK-500	10-24
105	500WQ3000-24-280	500	3000	24	740	280	82	2750	JJ1-280	GAK-500	10-24

Designed for simplified deployment, PWS sewage ejector pumps and submersible units follow industry-best practices.

1. Automatie coupling device system
Suitable for long-term fixed use occasions, with quick installation, testing, maintenance and other advantages. The system uses a special base, fixed at the bottom of the sewage pit, and the outflow pipe connected to the top of the pool to install a good supporting block, with a guide bar so that the two are connected to the pump and a specific bracket connected to the base along the guide bar down to reach the base, and its automatic coupling, sealing, and lifting is automatically disengaged.

2. Mobile installation system
It is supported by the bracket, connected to the water hose can work, this way is mainly used in emergency or maintenance construction needs.

Reference Model :100QW60-20-11

The hydrodynamic performance of our submersible sewage pumps is validated through ISO-certified testing.Comparative curves between standard submersible models and pressurized ejector pump configurations help users select optimal solutions for lift stations or forced main system

Reference Product Model：200WQ300 -32-45
Pump Type：Submersible pump
Rated Voltage：380V
Inlet Diameter：/
Outlet Diameter：200mm
Rated Power：45kW
Water Temp：15.0℃
Discharge Gauge Distance：2.00
Motor Efficiency：90%

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Contact PUMP WISE

We Usually Respond Within 24 Hours Between Monday-Friday

WENZHOU PUMP WISE FLUID EQUIPMENT CO., LTD.

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Sewage Pump

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Sales Manager：+39 389 949 9067

Sales Representative：+39 344 7395079
Sales Manager WhatsApp：+86 19518108981

winnie@pumppioneer.com

NO. 8, NORTH ROAD, PUMP AND VALVE INDUSTRIAL ZONE, DONGOU HETIAN INDUSTRIAL ZONE

Motor & Electronic Control

IBAN: LU814080000047209734

Account Holder Name: PUMP WISE FLUID EQUIPMENT CO., LTD

Currency of Receipt: EUR GBP PLN

Bank Name: Banking Circle S.A.

Bank Location: Luxembourg

Bank Address: 2 Boulevard de la Foire L-1528 Luxembourg Luxembourg

Account Type: checking

Swift Code: BCIRLULL (BCIRLULLXXX, if 11 characters are required)