QWP Non-Clogging Stainless Steel Submersible Sewage Pump view

Non-Clogging Stainless Steel Submersible Sewage Pump view

QWP Series Non-Clogging Stainless Steel Submersible Sewage Pump

Model NO. QWP Series Non-Clogging Stainless Steel Submersible Sewage Pump

Pump material: Cast Iron, Stainless Steel, Duplex Steel

Inlet & Outlet Size: DN25 - DN500

Flow Range: 8 - 3000 m³/h

Head Range: 7 - 60 m

Motor Power: 0.75 - 280 kW

Speed: 580-2900 r/min

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

What is QWP Series Non-Clogging Stainless Steel Submersible Sewage Pump？

The QW series is a submersible sewage pump designed for efficient, non-clogging wastewater and solid handling. Featuring an advanced single or double-channel impeller with optimized volute geometry, it allows large solids and long fibrous materials to pass smoothly without blockage or winding. Engineered with dual mechanical seals and dynamically balanced components, the pump offers high hydraulic efficiency, low vibration, and maximum operational stability. It is an ideal choice for municipal sewage, industrial wastewater treatment, building basements, mining dewatering, and commercial drainage systems.

Non-Clogging Hydraulic Design: Single or double-channel smooth-passage impeller design prevents clogging and winding when handling solids and fibrous waste.
Low Vibration & Smooth Operation: Dynamically and statically balanced impellers ensure minimal vibration, low noise, and extended mechanical seal life.
Automated & Smart Control Options: Supports auto-coupling installation systems and float switch level controls for effortless setup and unattended operation.
Material & Motor Options: Optional 304/316 SS casing and explosion-proof motors available for harsh environments or hazardous fluids.

Key Features & Advantages

Non-Clogging Casing & Impeller Design: Large-passage hydraulic structure easily passes long fibers up to 5x the discharge diameter and solid particles up to 50% of the outlet size.
High Efficiency & Low Energy Consumption: Optimized hydraulic-motor pairing delivers higher flow rates while significantly lowering operating electricity costs.
Durable Tandem Double Mechanical Seal: Tungsten carbide wear-resistant mechanical seals ensure over 8,000 hours of continuous, trouble-free operation under standard conditions.
Cost-Saving Submersible Setup: Compact structure requires no pump house—works directly submerged to drastically cut civil engineering and installation expenses.
Early Oil-Chamber Water Ingress Alert: Built-in oil-water sensor detects seal failure early and triggers protective signals to prevent motor damage.
Smart Safety Control Protection: Optional fully automated control panel guards against leakage, current overload, phase loss, and over-temperature.
Quick Auto-Coupling Servicing: Dual-guide auto-coupling system allows rapid installation and maintenance without technicians ever entering the sewage pit.
Automated Level Control Option: Optional float switch automatically starts or stops the pump based on water level changes for zero-maintenance operation.
Full-Head Overload Protection: Carefully rated to run smoothly across the full head curve without risk of motor overload or burnout.
Dry-Running Capability: Optional external cooling jacket system enables safe operation even under un-submerged (dry pit) conditions.
Versatile Mounting Options: Available in fixed auto-coupling installation or portable hose-connected setups to suit various job sites.

Applications

Industrial Wastewater: Factory and commercial heavy-duty effluent discharge.
Municipal Works: Wastewater treatment plants and urban lift stations.
Residential & Commercial Facilities: Sewage pumping stations for residential areas, hotels, and hospitals.
Underground Infrastructure: Dewatering for civil defense shelters, basements, and construction sites.
Mining & Heavy Industry: Auxiliary drainage systems for mining, exploration, and quarries.
Agriculture & Water Supply: Biogas slurry transfer, agricultural irrigation, and water treatment plant intakes.

Operating Conditions & Limits

Fluid Temperature:≤60℃
Fluid Density: 1.0 - 1.3 ×10^3 kg/ m³
pH Range: 5 to 9
Submersion Depth: Motors without internal circulation cooling jackets must remain at least 50% submerged during operation.
Duty Limits: Must operate within the specified rated head range to prevent overload. (Note: If full-head range operation is required, please specify upon ordering for custom factory setup).
Current Limit: Operating current must not exceed the motor's rated current.

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

Q1: What grade of stainless steel (304, 316, or Duplex) should be specified for aggressive industrial wastewater?

SS304: Suitable for mild chemical runoff, food processing wastewater, and general acidic/alkaline washdown.

SS316: Standard choice for medium corrosive industrial fluids, pharmaceutical discharge, and environments with moderate chloride concentration.

Duplex Steel: Required for highly severe corrosive fluids, marine/saltwater pits, and high-temperature chemical sumps where pitting corrosion resistance is critical.

Q2: How does the QWP design manage heat dissipation and motor protection under continuous submerged duty?

The motor is directly cooled by the surrounding liquid medium. To prevent dry-burn or liquid entry, it integrates IP68 sealing protection, built-in thermal overload sensors in the windings, and an oil-filled seal chamber with dual mechanical seals. Not recommended for low-water-level (semi-submerged) operating conditions.

Q3: What installation options (Portable vs. Auto-Coupling System) are supported for pit management?

Portable Stand Mounting: Ideal for temporary drainage, mobile emergency relief, or shallow sumps using flexible hose connections.

Auto-Coupling System (GAK): Preferred for permanent wet-well stations. Allows the pump to slide down dual guide rails and automatically seat on the discharge elbow, enabling quick maintenance retrieval without sending technicians into hazardous confined spaces.

Q4: How does the hydraulic passage reduce clogging risks from solids and stringy rags in municipal sumps?

Equipped with a precision-cast, large-passage non-clogging impeller (single or double vane), the hydraulic profile minimizes localized eddy currents. Large solids and fibrous debris are rapidly accelerated through the casing without catching on internal ribs or shaft shoulders, ensuring uninterrupted operation in raw sewage pits.

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