Product Overview

QW / WQ Submersible Sewage Pump is a submersible single-stage centrifugal pump designed for wastewater and sewage transfer containing suspended solids and soft particles.

It resolves clogging, surface pump priming limitations, and unstable drainage issues in submerged and pit-type sewage systems.

It is suitable for municipal sewage treatment plants, basement drainage pits, industrial wastewater tanks, flood control pumping stations, and building sewage lifting applications.

✔ Confirm flow rate, head, installation depth, and solid particle size before model selection to ensure hydraulic stability and non-clog operation.

Model Designation

WQQW Submersible Sewage Pump type 2

Applications

Typical Operating Conditions

• Submerged installation in wastewater collection pits

• Municipal sewage transfer pumping stations

• Industrial effluent discharge tanks

• Flood control and emergency drainage systems

• Building basement drainage systems

Engineering Advantages

• Submersible motor-pump integrated design eliminates suction limitations

• Large-channel non-clog impeller enhances solid handling capability

• Double mechanical seal configuration improves sealing reliability

• Oil chamber seal protection reduces leakage risk

• Compact submerged installation reduces footprint and piping complexity

✔ Designed for continuous submerged operation in sewage systems requiring stable discharge and solid passage reliability.

System Components

QW / WQ Submersible Sewage Pump：
The QW / WQ Submersible Sewage Pump mainly consists of:

• Pump casing
• Non-clog impeller
• Pump shaft
• Double mechanical seal assembly
• Oil chamber
• Bearing assembly
• Submersible motor
• Cable sealing system

Technical Specifications

Service Conditions

• Medium: Wastewater with suspended solids

• Solid particle size within hydraulic passage limits

• Submerged installation depth within rated limits

Operating Conditions

Flow rate: 7 – 2650 m³/h
Head: 7 – 60 m
Power range: 0.55 – 250 kW
Speed: 740 rpm /980 rpm /1450 rpm / 2900 rpm
Liquid temperature: ≤ 40°C
Working pressure: ≤ 0.6 MPa

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

WQQW Submersible Sewage Pump typejiegou 1

Performance Data

Serial No.	Name	Serial No.	Name	Serial No.	Name	Serial No.	Name
1	Shaft sleeve	6	Upper shaft seat	11	Oil-water probe	16	Impeller bolt
2	Motor wiring	7	Motor casing	12	Oil chamber	17	Impeller
3	Terminal box	8	Stator	13	Mechanical seal	18	Seal ring
4	Motor cover	9	Shaft (rotor)	14	Rear cover plate	19	Chassis
5	Bearing	10	Bearing	15	Pump body

Installation Diagram

Performance Parameters

Item No.	Diameter	Flow Rate	Head	Speed	Power	Efficiency	A	B	C	D	H	Auto-Coupling Device
Item No.	mm	(m3/h)	(M)	(r/min)	(kw)	(%)	A	B	C	D	H	Auto-Coupling Device
25-7-8-0.55	25	7	8	2900	0.55	45	120	360	225	210	540
25-8-22-1.1	25	8	22	2900	1.1	45	120	360	225	210	540
32-8-12-0.75	32	8	12	2900	0.75	48	120	360	225	210	540
32-12-15-1.1	32	12	15	2900	1.1	45	120	360	225	210	540
40-15-15-1.5	40	15	15	2900	1.5	48	120	360	225	210	540
40-15-30-2.2	40	15	30	2900	2.2	54	120	360	225	210	540
50-20-7-0.75	50	20	7	2900	0.75	51	145	440	275	185	520	GAK-50
50-10-10-0.75	50	10	10	2900	0.75	52	120	250	230	185	520	GAK-50
50-20-15-1.5	50	20	15	290	1.5	53	120	250	230	210	564	GAK-50
50-15-25-2.2	50	15	25	2900	2.2	54	145	410	245	205	550	GAK-50
50-18-30-3	50	18	30	2900	3	55	155	420	250	260	660	GAK-50
50-40-15-4	50	40	15	2900	4	55	140	457	264	310	730	GAK-50
50-25-32-5.5	50	25	32	2900	5.5	55	165	480	285	310	770	GAK-50
50-20-40-7.5	50	50	20	2900	7.5	58	175	480	285	310	770	GAK-50
65-25-15-2.2	65	25	15	2900	2.2	50	145	450	280	205	570	GAK-65
65-37-13-3	65	37	13	2900	3	57	165	475	305	260	652	GAK-65
65-25-30-4	65	25	30	2900	4	61	170	505	300	325	710	GAK-65
65-30-40-7.5	65	30	40	2900	7.5	56						GAK-65
65-35-50-11	65	35	50	2900	11	45	165	460	300	350	920	GAK-65
65-35-60-15	65	35	60	2900	15	65	165	460	300	350	920	GAK-65
80-40-7-2.2	80	40	7	1450	2.2	59	165	510	330	260	640	GAK-80
80-43-13-3	80	43	13	2900	3	70	165	540	330	325	652	GAK-80
80-40-15-4	80	40	15	2900	4	61	180	565	330	325	775	GAK-80
80-60-13-5.5	80	60	13	2900	5.5	67	165	565	330	325	775	GAK-80
80-65-25-7.5	80	65	25	2900	7.5	63	180	656	330	325	775	GAK-80
Item No.	Diameter	Flow Rate	Head	Speed	Power	Efficiency	A	B	C	D	H	Auto-Coupling Device
Item No.	mm	(m3/h)	(M)	(r/min)	(kw)	(%)	A	B	C	D	H	Auto-Coupling Device
100-80-10-4	100	100	10	1450	4	65	220	700	430	420	800	GAK-100
100-100-15-7.5	100	100	15	1450	7.5	68	225	690	420	420	825	GAK-100
100-80-20-7.5	100	80	20	1450	7.5	65	225	690	420	420	825	GAK-100
100-100-25-11	100	100	25	1450	11	70	225	690	450	520	940	GAK-100
100-100-30-15	100	100	30	1450	15	65						GAK-100
100-100-35-18.5	100	100	35	1450	18.5	68	225	680	410	420	970	GAK-100
125-130-15-11	125	130	15	1450	11	72						GAK-125
125-130-20-15	125	130	20	1450	15	75						GAK-125
150-145-9-7.5	150	145	9	1450	7.5	76	225	800	510	420	795	GAK-150
150-180-15-15	150	180	15	1450	15	69	275	950	610	520	1060	GAK-150
150-180-20-18.5	150	180	20	1450	18.5	72	250	925	858	520	1060	GAK-150
150-180-25-22	150	180	25	1450	22	78	260	925	585	520	1060	GAK-150
150-130-30-22	150	130	30	1450	22	78	260	925	585	520	1060	GAK-150
150-180-30-30	150	180	30	1450	30	78						GAK-150
150-200-30-37	150	200	30	1450	37	73	275	1025	650	520	1320	GAK-150
200-300-7-11	200	300	7	980	11	66	290	990	610	520	1150	GAK-200
200-250-11-15	200	250	11	1450	15	64	270	970	600	520	1120	GAK-200
200-250-15-18.5	200	250	15	1450	18.5	73	290	1130	715	520	1130	GAK-200
200-400-10-22	200	400	10	1450	22	75	275	1120	710	520	1130	GAK-200
200-400-13-30	200	400	13	14501	30	76	275	1120	710	520	1320	GAK-200
200-300-15-22	200	300	15	1450	22	76	275	1120	710	520	1130	GAK-200
200-250-22-30	200	250	22	1450	30	71	275	1120	710	520	1290	GAK-200
200-350-25-37	200	350	25	1450	37	71	325	1080	680	520	1370	GAK-200
200-400-30-45	200	400	30	1450	45	74	330	1250	780	520	1370	GAK-200
Item No.	Diameter	Flow Rate	Head	Speed	Power	Efficiency	A	B	C	D	H	Auto-Coupling Device
Item No.	mm	(m3/h)	(M)	(r/min)	(kw)	(%)	A	B	C	D	H	Auto-Coupling Device
250-600-9-30	250	600	9	980	30	78	440	1100	700	520	1660	GAK-250
250-600-12-37	250	600	12	1450	37	76	440	1100	700	520	1660	GAK-250
250-600-15-45	250	600	15	1450	45	73	440	1100	700	520	1660	GAK-250
250-600-20-55	250	600	20	1450	55	73	440	1100	700	520	1700	GAK-250
250-600-25-75	250	600	25	1450	75	71	440	1100	700	520	1750	GAK-250
300-800-12-45	300	800	12	980	45	74	470	1305	850	650	1845	GAK-300
300-480-15-45	300	480	15	1450	45	66	470	1305	850	650	1845	GAK-300
300-800-15-55	300	800	15	1450	55	73	470	1305	850	650	2060	GAK-300
300-600-20-55	300	600	20	1450	55	73	470	1305	850	650	2060	GAK-300
300-800-20-75	300	800	20	1450	75	75	470	1305	850	650	2120	GAK-300
300-950-20-90	300	950	20	1450	90	76	470	1305	850	650	2120	GAK-300
300-1000-25-110	300	1000	25	1450	110	76	500	1350	875	650	2220	GAK-300
300-1100-10-55	300	1100	10	1450	55	73						GAK-300
350-1500-15-90	350	1500	15	740	90	87	630	1533	1280	700	2190	GAK-350
350-1200-18-90	350	1200	18	980	90	85	500	900	500	750	2190	GAK-350
350-1100-28-132	350	1100	28	980	132	84	700	1616	1363	700	2480	GAK-350
350-1000-36-160	350	1000	36	980	160	84	700	1666	1413	700	2590	GAK-350
400-1760-7.5-55	400	1760	7.5	980	55	83						GAK-400
400-1500-10-75	400	1500	10	980	75	86	600	1650	1365	780	2000	GAK-400
400-2000-13-110	400	2000	13	980	110	84	600	1650	1365	780	2280	GAK-400
400-2000-15-132	400	2000	15	980	132	83						GAK-400
400-1700-22-160	400	1700	22	980	160	83	630	1670	1380	780	2600	GAK-400
400-1500-26-160	400	1500	26	980	160	84	630	1670	1380	780	2600	GAK-400
Item No.	Diameter	Flow Rate	Head	Speed	Power	Efficiency	A	B	C	D	H	Auto-Coupling Device
Item No.	mm	(m3/h)	(M)	(r/min)	(kw)	(%)	A	B	C	D	H	Auto-Coupling Device
400-1800-32-250	400	1800	32	980	250	82	670	1730	1440	780	2850	GAK-400
500-2500-10-110	500	2500	10	740	110	85	900	2218	1875	900	2250	GAK-500
500-2600-15-160	500	2600	15	740	160	84	955	1968	1625	900	2450	GAK-500
500-2400-22-220	500	2400	22	740	220	85	900	2218	1875	900	2520	GAK-500
500-2650-24-250	500	2650	24	740	250	85	1017	2198	2395	900	3000	GAK-500

How to Select a Pump Model

• Determine required flow rate and total dynamic head including pipe losses

• Evaluate maximum solid particle size and concentration

• Confirm installation depth and cable length requirements

• Select appropriate speed for stability or compact configuration

• Verify discharge flange size and connection standard

✔ Proper selection ensures submerged stability, seal protection reliability, and long-term drainage performance.

Engineering Notes

• Not suitable for highly abrasive mineral slurry

• Continuous dry exposure of motor is prohibited

• Excessive fibrous content may require cutter-type configuration

• Pump must operate within rated hydraulic performance range

• Seal oil chamber integrity must be periodically inspected

Compliance & Quality Assurance

• Factory hydraulic performance testing

• Motor insulation resistance verification

• Seal leakage inspection

• Rotor dynamic balance testing

• Casing hydrostatic pressure testing

• Optional third-party inspection available

Safety Notice

• Do not operate under dry-running condition

• Ensure proper grounding before energizing

• Do not exceed rated discharge pressure

• Disconnect power before maintenance

OEM & Customization

This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.

Available options include:

• Motor voltage & frequency
• Impeller material selection
• Mechanical seal configuration
• Cable length customization
• Anti-corrosion coating

Configuration is determined based on duty point and project specifications.

FAQs

Q: Can the pump operate under VFD control?
A: Yes, provided motor cooling and load remain within rated limits.

Q: What is the maximum allowable solid particle size?
A: It depends on the impeller passage design and model specification.

Q: What sealing configuration is used?
A: Double mechanical seal with oil chamber protection.

Q: What is the maximum liquid temperature?
A: ≤ 40°C for standard configuration.

Q: What rotational speeds are available?
A: 1450 rpm and 2900 rpm.

Q: Is it suitable for continuous submerged operation?
A: Yes, it is designed for continuous submerged duty.

Q: What is the maximum working pressure?
A: ≤ 0.6 MPa.

QW/WQ Submersible Sewage Pump, Non-Clogging