QW/WQ Submersible Sewage Pump, Non-Clogging

Product Overview

The QW/WQ Series Non-Clogging Submersible Sewage Pump is designed for high solid content and fibrous media. With an optimized hydraulic design, it integrates high-efficiency pumping, anti-clogging capabilities, and reliable operation into a compact structure. The pump features a single-channel or double-channel impeller, allowing it to efficiently handle solid particles and long fiber materials. It is suitable for municipal sewage treatment, industrial wastewater discharge, and agricultural irrigation applications.

Model Designation

Key Features

• Single-channel or double-channel impeller design, improving the ability to handle solid particles and long fibers, reducing the risk of clogging.

• Mechanical seals with abrasion-resistant hard alloy friction pairs, ensuring long-term continuous operation and reliable sealing performance.

• Compact structure with low noise, small footprint, easy maintenance, and convenient component replacement.

• Optional automatic control system for start/stop operations based on liquid level changes, reducing manual intervention.

• Multiple installation options available, allowing installation and maintenance without entering the sewage pit.

• Operates safely within the design performance range, ensuring the motor is not overloaded.

Engineering Summary

The QW/WQ Series Non-Clogging Submersible Sewage Pump adopts an optimized hydraulic design, with a single or double-channel impeller and high-efficiency cutting system, ensuring reliable handling of wastewater with solid particles and long fibers. The pump’s hydraulic components, including the impeller and casing, have been designed for durability, and the pump performs well in a wide range of applications. It is ideal for industrial, municipal, and construction drainage systems, offering long-term reliability and low maintenance.

Typical Applications

The QW/WQ Series Non-Clogging Submersible Sewage Pump is suitable for:

• Industrial and commercial wastewater discharge systems

• Residential sewage lifting stations

• Municipal sewage treatment plant discharge systems

• Civil defense and emergency drainage systems

• Sewage discharge in hospitals, hotels, and public buildings

• Municipal engineering and construction site drainage

• Auxiliary dewatering in mining operations

• Rural biogas pits and agricultural irrigation

It is designed for pumping sewage, wastewater with solid particles, sludge, wood chips, starch, minerals, and other suspended solids, as well as clean water or mildly corrosive liquids.

System & Operation

Components & Supply

• Single or double-channel impeller design, improving the ability to handle solid particles and long fibers.

• High abrasion-resistance mechanical seals with hard alloy friction pairs, ensuring long-lasting and reliable sealing performance.

• Compact structure with low noise, small footprint, and easy maintenance, facilitating quick component replacement.

• Optional fully automatic control panel for start/stop operation based on liquid level changes, reducing the need for manual intervention.

Technical Specifications

Operating Conditions

• Liquid Temperature:
  • Standard Pump: ≤ 40°C
  • Hot Water Pump: ≤ 80°C (special applications can meet up to 120°C)

• Ambient Temperature: ≤ +40°C

• Maximum Working Pressure: 10 bar

• Maximum Allowable Inlet Pressure: Limited by system working pressure

• Fluid Requirements:
  • Clean, low-viscosity, non-flammable, sulfur-free liquids, free from solid particles or fibers
  • Suitable for pumping mineral water, softened water, purified water, light oils, and mild chemical fluids
  • If the liquid’s density or viscosity exceeds that of water, a higher-rated motor should be selected
  • The pump’s suitability for specific liquids depends on factors such as chloride content, pH, temperature, and solvent/oil content

Service Conditions

• Installation Altitude: Must not exceed 1000 meters; for higher elevation applications, specify at the time of order for proper configuration.

• The pump must not be used in flammable or explosive environments, nor should it handle combustible liquids.

• Installation should be in a well-ventilated, dry, and vibration-free location.

• Maximum ambient temperature should not exceed +40°C.

Protection Functions

• The motor should be equipped with overload protection, phase failure protection, and overheat protection devices to prevent damage under abnormal conditions.

• Dry-run protection is recommended to prevent mechanical seal failure in case of insufficient water supply.

• Pressure switches or variable frequency drives (VFDs) should be used to maintain safe pressure ranges.

• Check valves and anti-backflow devices must be installed to prevent damage caused by reverse flow after shutdown.

Selection Criteria

• Select the pump model and number of stages based on required flow rate and head.

• Choose appropriate wetted materials (e.g., SS304, SS316L) based on fluid temperature, pH, and chloride content.

• Select sealing structure (mechanical seal or packing seal) based on the fluid’s corrosive properties.

• Ensure installation space and piping layout compatibility with the horizontal configuration.

• If the pumped liquid has higher viscosity or density than water, a higher-rated motor should be selected to meet the required shaft power.

Installation & Dimensions

Outline Drawing

 

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
	mm	(m3/h)	(M)	(r/min)	(kw)	(%)
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
	mm	(m3/h)	(M)	(r/min)	(kw)	(%)
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
	mm	(m3/h)	(M)	(r/min)	(kw)	(%)
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
	mm	(m3/h)	(M)	(r/min)	(kw)	(%)
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

Operating Manual

Usage Precautions

1. Do not use the pump in environments with flammable or explosive media, and do not pump flammable liquids.

2. Avoid impact or compression of the power cable, and never use the cable as a lifting rope.

3. Do not pull the cable during pump operation to avoid damaging the cable, which may lead to electrical accidents or compromise cable sealing and the insulation performance of the motor wiring compartment.

4. When using fixed automatic coupling installation, use a lifting chain and hook to lift the pump, ensuring to lift and lower gently.

5. When placing the pump into water, it should be lifted vertically. Do not place it horizontally or allow it to sink into sludge.

6. Install a flow control valve on the discharge pipeline to prevent excessive flow, which could overload the motor.

OEM & Custom

We provide OEM/ODM customization for global clients. Options include stainless steel versions, explosion-proof motors, extended cables, control panels, auto-coupling sets, and custom voltage/frequency configurations. Pumps can be tailored for municipal, mining, marine, or industrial wastewater systems, ensuring efficiency and long-term reliability.

FAQs

1. Q: What’s the main difference between QW and WQ types?
2. A: QW is a movable installation type, while WQ is fixed with automatic guide rail coupling for easier maintenance.
3. Q: Can the pump handle solid or fibrous waste?
4. A: Yes, the impeller design allows passage of solids up to 80 mm depending on model, preventing clogging.
5. Q: What materials are available?
6. A: Standard models use cast iron; optional stainless steel or duplex materials are available for corrosive media.
7. Q: What voltages and frequencies are supported?
8. A: Standard voltages 380 V/50 Hz; custom 220 V, 415 V, or 60 Hz versions are available upon request.
9. Q: How is maintenance performed?
10. A: Pumps use modular designs with quick-release seals and auto-coupling for easy inspection and part replacement.
11. Q: Do you provide control panels or float switches?
12. A: Yes, intelligent control cabinets and float switches can be supplied with the pump system.
13. Q: What export markets do you serve?
14. A: Our pumps are exported to Southeast Asia, Africa, South America, and the Middle East, meeting ISO and CE standards.