Self-Priming Sewage Pump – No Additional Water Supply Device

The self-priming sewage pump is a uniquely designed pump that can automatically draw in liquids and transport them after starting, without the need for additional water supply devices. Its main features include rapid self-priming, easy operation, and compact structure. Self-priming sewage pumps are widely used in agricultural irrigation, municipal drainage, industrial water supply, and household water supply, suitable for handling various media such as clear water, wastewater, and chemical liquids. With advantages such as anti-blocking, corrosion resistance, and ease of maintenance, self-priming sewage pumps have become an ideal choice for transporting various liquids.

Self-Priming Sewage Pump

Specification
Video

Specification

ZW Self-Priming Non-Clogging Sewage Pump
ZWⅡ High-Efficiency Self-Priming Sewage Pump

ZW Self-Priming Non-Clogging Sewage Pump

The ZW series self-priming non-clogging sewage pump integrates self-priming and non-clogging sewage discharge capabilities, utilizing an axial recirculation external mixing design. Through the unique design of the pump body and impeller flow channel, it not only functions like a general self-priming clean water pump without the need for a bottom valve and priming water but also efficiently handles liquids containing large solid particles and long-fiber impurities. This pump features a simple structure, good self-priming performance, strong sewage discharge capability, high efficiency and energy saving, and convenient use and maintenance. It is widely applicable in municipal sewage projects, river pond aquaculture, light industry, paper making, textiles, food processing, chemical industry, power generation, fiber, pulp, and other chemical media involving mixed suspensions, making it an ideal pump for handling impurities.

Performance Parameters

Read MoreRead Less

Table 1: ZW Self-Priming Non-Clogging Sewage Pump Performance parameters
Type	Inlet Diameter (mm)	Outlet Diameter (mm)	Flow Rate (m³/h)	Head (m)	Power (kw)	Speed (r/min)	Net Positive Suction Head (m)	Efficiency (%)	Self-priming Height (m)	Pressure Control Range (MPa)	Weight (kg)
ZW25-8-15	25	25	8	15	2.2	2900	3.5	35	4.5	0.1–0.18	75
ZW32-5-20	32	32	5	20	2.2	2900	3.5	35	4.5	0.15–0.22	75
ZW32-10-20	32	32	10	20	2.2	2900	3.5	38	4.5	0.15–0.22	75
ZW32-9-30	32	32	9	30	3	2900	3.5	48	5	0.24–0.32	90
ZW 40-10-20	40	32	10	20	2.2	2900	3.5	38	5	0.15–0.22	75
ZW40-20-12	40	32	20	12	2.2	2900	3.5	45	5	0.1–0.18	75
ZW40-15-26	40	32	15	26	3	2900	3.5	48	5	0.24–0.32	90
ZW50-10-20	50	40	10	20	2.2	2900	3.5	38	5	0.15–0.22	75
ZW50-20-15	50	40	20	15	2.2	2900	3.5	42	5	0.1–0.18	75
ZW50-15-27	50	40	15	27	3	2900	3.5	48	5	0.24–0.32	90
ZW50-20-35	50	40	20	35	5.5	2900	3.5	48	5	0.28–0.37	130
ZW65-30-18	65	65	30	18	4	1450	3.5	43	5	0.12–0.20	170
ZW65-25-30	65	65	25	30	5.5	2900	3.8	48	5	0.24–0.32	150
ZW65-25-40	65	65	25	40	7.5	2900	3.8	45	5	0.32–0.42	170
ZW65-40-25	65	65	40	25	7.5	2900	3.8	45	5	0.18–0.27	180
ZW80-40-16	80	65	40	16	4	1450	3.8	54	5	0.1–0.18	170
ZW80-40-25	80	65	40	25	7.5	2900	3.8	45	5	0.18–0.27	180
ZW80-25-40	80	65	25	40	7.5	2900	3.8	45	5	0.32–0.42	180
ZW80-65-25	80	65	65	25	11	2900	3.8	50	5	0.18–0.27	230
ZW80-80-35	80	65	80	35	15	2900	3.8	57	5	0.28–0.37	240
ZW80-40-50	80	65	40	50	18.5	2900	3.8	40	5	0.42–0.52	280
ZW80-50-60	80	65	50	60	22	2900	3.8	42	5	0.53–0.61	300
ZW100-100-15	100	80	100	15	7.5	1450	4	62	5	0.1–0.16	270
ZW100-80-20	100	80	80	20	11	1450	4	55	5	0.13–0.21	290
ZW100-100-20	100	80	100	20	11	1450	4	55	5	0.13–0.21	290
ZW100-100-30	100	80	100	30	22	2900	4	51	4.5	0.24–0.32	300
ZW100-100-30	100	80	100	30	22	1450	4	45	5	0.24–0.32	500
ZW100-80-45	100	80	80	45	30	2900	4	40	4.5	0.38–0.46	420
ZW100-80-60	100	80	80	60	37	2900	4	40	5	0.54–0.62	450
ZW100-80-80	100	80	80	80	45	2900	4	45	5	0.74–0.81	540
ZW125-120-20	125	125	120	20	15	1450	4.5	50	5	0.13–0.21	355
ZW150-180-14	150	125	180	14	15	1450	5	59	5	0.08–0.16	355
ZW150-180-20	150	125	180	20	22	1450	5	50	5	0.13–0.21	450
ZW150-180-30	150	125	180	30	37	1450	5	55	5	0.24–0.32	620
ZW150-180-40	150	125	180	40	55	1450	5	46	5	0.32–0.41	1000
ZW150-180-50	150	125	180	50	75	1450	5	45	5	0.45–0.52	1200
ZW200-280-14	200	150	280	14	22	1450	5	55	5	0.08–0.16	600
ZW200-280-20	200	150	280	20	37	1450	5	56	5	0.13–0.21	750
ZW200-300-25	200	150	300	25	45	1450	5	57	5	0.18–0.27	780
ZW200-280-28	200	150	280	28	55	1450	4.8	63	5	0.22–0.3	1000
ZW250-420-20	250	200	420	20	55	1450	6	50	4.5	0.13–0.21	1150
ZW300-800-14	300	250	800	14	55	1450	6	50	4.5	0.07–0.12	1400
ZW350-1200-14	350	300	1200	14	110	1450	6	60	4	0.10–0.15	2600

Usage Range

Ambient temperature ≤ 50 °C, medium temperature ≤ 80 °C, special requirements can reach 200 °C
The medium's pH value of 6–9 is suitable for cast iron material, while 1–14 is for stainless steel 304 or 316L
The medium density should not exceed 1240 kg/m³.
The self-priming height must not exceed the specified value of the pump, and the total length of the suction pipe should ideally be ≤ 10 m.
The diameter of suspended particles that can be passed through is 60% of the pump diameter, and the fiber length is 5 times the pump diameter.

ZWⅡ High-Efficiency Self-Priming Sewage Pump

The ZWⅡ series second-generation high-efficiency self-priming sewage pump isa novel product jointly designed by our company and Zhejiang University of Technology. It was developed after extensive research into similar technologies at home and abroad. After optimizing and redesigning the pump body and impeller, the efficiency is generally improved by more than 10% compared to the ZW self-priming sewage pump, ensuring stable operation and reliable performance, truly achieving high efficiency and energy saving. It is also suitable for municipal sewage engineering, pond aquaculture, light industry, paper making, textile, food, chemical engineering, electric power, fiber, slurry, and mixed suspension chemical media.

A high-efficiency self-priming sewage pump

Performance Parameters

Read MoreRead Less

Table 2: ZWⅡ High-Efficiency Self-Priming Sewage Pump parameters
Type	Inlet Diameter (mm)	Outlet Diameter (mm)	Flow Rate (m³/h)	Head (m)	Power (kw)	Speed (r/min)	Net Positive Suction Head (m)	Efficiency (%)	Self-priming Height (m)	Pressure Control Range (MPa)	Weight (kg)
ZWⅡ25-8-15	25	25	8	15	1.1	2900	40	3.5	4.5	0.10–0.18	80
ZWⅡ32-10-10	32	32	10	10	1.1	2900	40	3.5	4.5	0.07–0.12	80
ZWⅡ32-10-20	32	32	10	20	1.5	2900	48	3.5	4.5	0.15–0.22	85
ZWⅡ32-10-30	32	32	10	30	2.2	2900	48	3.5	5	0.24–0.32	90
ZWⅡ40-15-15	40	32	15	15	1.5	2900	50	3.5	4.5	0.10–0.18	90
ZWⅡ40-15-20	40	32	15	20	2.2	2900	50	3.5	5	0.15–0.22	90
ZWⅡ40-15-30	40	32	15	30	3	2900	50	3.5	5	0.25–0.32	120
ZWⅡ40-15-40	40	32	15	40	4	2900	45	3.5	5	0.35–0.42	150
ZWⅡ50-20-15	50	40	20	15	2.2	2900	50	3.5	4.5	0.10–0.18	95
ZWⅡ50-20-20	50	40	20	20	3	2900	50	3.5	4.5	0.15–0.22	100
ZWⅡ50-20-30	50	40	20	30	4	2900	50	3.5	5	0.25–0.32	145
ZWⅡ50-20-40	50	40	20	40	5.5	2900	50	3.5	4.5	0.35–0.42	170
ZWⅡ50-20-50	50	40	20	50	7.5	2900	50	3.5	5	0.45–0.52	175
ZWⅡ65-30-20	65	65	30	20	4	2900	55	3.5	5	0.15–0.22	160
ZWⅡ65-30-30	65	65	30	30	5.5	2900	55	3.5	4.5	0.25–0.32	190
ZWⅡ65-30-40	65	65	30	40	7.5	2900	50	3.5	5	0.35–0.42	195
ZWⅡ65-30-50	65	65	30	50	11	2900	50	3.5	5	0.45–0.52	260
ZWⅡ80-40-20	80	65	40	20	5.5	2900	60	3.5	5	0.15–0.22	180
ZWⅡ80-40-25	80	65	40	25	5.5	2900	60	3.5	5	0.20–0.27	185
ZWⅡ80-40-30	80	65	40	30	7.5	2900	60	3.5	5	0.25–0.32	190
ZWⅡ80-40-50	80	65	40	50	15	2900	55	3.5	5	0.45–0.52	275
ZWⅡ80-65-25	80	65	65	25	11	2900	60	3.8	5	0.20–0.27	260
ZWⅡ80-65-40	80	65	65	40	15	2900	60	3.8	5	0.35–0.43	275
ZWⅡ80-65-50	80	65	65	50	22	2900	55	3.8	5	0.45–0.52	350
ZWⅡ80-65-60	80	65	65	60	30	2900	55	3.8	5	0.55–0.62	415
ZWⅡ100-80-20	100	80	80	20	11	2900	60	4.5	5	0.15–0.22	280
ZWⅡ100-80-50	100	80	80	50	22	2900	60	4.5	5	0.45–0.52	365
ZWⅡ100-80-60	100	80	80	60	30	2900	60	4.5	5	0.55–0.62	425
ZWⅡ100-80-80	100	80	80	80	37	2900	60	4.5	5	0.75–0.83	460
ZWⅡ100-100-15	100	80	100	15	7.5	2900	65	5.5	4.5	0.10–0.18	230
ZWⅡ100-100-20	100	80	100	20	11	2900	65	5.5	4.5	0.15–0.22	280
ZWⅡ100-100-30	100	80	100	30	15	2900	65	5.5	4.5	0.25–0.32	290
ZWⅡ100-100-50	100	80	100	50	30	2900	60	5.5	4.5	0.45–0.52	450
ZWⅡ125-120-20	125	125	120	20	15	1450	65	5	5	0.15–0.22	450
ZWⅡ150-160-25	150	125	160	25	22	1450	65	5	5	0.20–0.28	530
ZWⅡ150-200-15	150	125	200	15	15	1450	65	5	4.5	0.10–0.18	495
ZWⅡ150-200-20	150	125	200	20	22	1450	65	5	4.5	0.15–0.22	570
ZWⅡ150-200-30	150	125	200	30	30	1450	65	5	5	0.25–0.32	630
ZWⅡ150-200-40	150	125	200	40	45	1450	65	5	4.5	0.35–0.43	930
ZWⅡ150-200-50	150	125	200	50	55	1450	65	5	4.5	0.45–0.53	1020
ZWⅡ200-300-15	200	150	300	15	22	1450	65	5	5	0.10–0.18	595
ZWⅡ200-300-20	200	150	300	20	30	1450	65	5	4.5	0.15–0.23	690
ZWⅡ200-300-25	200	150	300	25	37	1450	65	5	4.5	0.20–0.28	780
ZWⅡ200-300-30	200	150	300	30	45	1450	65	5	5	0.25–0.32	800
ZWⅡ200-300-50	200	150	300	50	90	1450	60	5	4.5	0.45–0.525	1440
ZWⅡ250-400-20	250	200	400	20	45	1450	65	5.5	4	0.15–0.22	1315
ZWⅡ250-600-30	250	200	600	30	90	1450	65	5.5	4	0.25–0.33	1650
ZWⅡ300-800-15	300	250	800	15	75	1450	65	5.5	4	0.10–0.18	1800
ZWⅡ300-1000-20	300	250	1000	20	110	1450	65	5.5	4	0.15–0.55	2450
ZWⅡ350-1200-15	350	300	1200	15	90	1450	65	5.5	4	0.10–0.18	2500

Usage Range

Ambient temperature ≤ 50 °C, medium temperature ≤ 80 °C. Special requirements can reach 200 °C (custom mechanical seal external flushing water cooling required).
Medium density does not exceed 1240 kg/m³.
Medium pH value for cast iron material is 6–9, for stainless steel it is 2–13.
Self-priming height must not exceed the specified value (4–5 m), total length of the suction pipe should be ≤ 10 m (water temperature 20 °C, standard atmospheric pressure).
The diameter of suspended particles that can be passed through is 60% of the pump diameter, and the fiber length is 5 times the pump diameter
When the medium temperature is high, the self-priming height and suction pipe length need to be reduced.

Videos

Downloads

Here are product catalogue and data sheet for your reference. more information just contact us.