DN25-DN300 Split-Type Stainless Steel Self-Priming Sewage Pump

Model NO. PWSZW

Flow Range: 3.2–1200 m³/h
Head Range: 10–75 m
Motor Power: 1.5 kW to 110 kW
Inlet/Outlet Range: DN25-DN300
Structure: Split-type axial backflow external mixing structure, featuring a pump casing, impeller, mechanical seal, and bearing seat assembly for rapid disassembly and maintenance.
Material: Stainless steel (PH 2–13 corrosion resistance) / cast iron (default), with medium temperature tolerance ≤80°C (customizable up to 200°C).
Torque: High-torque motors are matched to the model to ensure stable conveyance of large particles and fibrous impurities.
Application: Specifically designed for municipal, chemical, and other highly corrosive sewage environments. Features anti-clogging design, rapid self-priming (5-minute startup), 65% operational efficiency, energy savings, and long-term durability.

Quantity

PWS Split-Type Stainless Steel Self-Priming Sewage Pump

PWS launched the split - type stainless steel self priming transfer pump is crafted from premium stainless steel for durability and corrosion resistance. It excels as a robust solution for sewage handling, boasting powerful self - priming performance, making it an ideal self priming transfer pump and self priming water pumps for sewage, and also serving effectively as a lift pump for sewage in tough conditions.

Self-priming performance

Self-priming height: Up to 5 meters.

Self-priming time: 5 minutes at maximum suction condition (5 meters).

No bottom valve required: Unique axial reflux external mixing design enables quick startup by simply priming with water.

Durability & Adaptability

Temperature range:

Medium temperature: ≤80℃(standard), which can be customized to 200℃;ambient temperature: ≤50℃.

Seal life: Mechanical seal exceeds 3600 hours under normal operating conditions.

Anti-Clogging Design

Solid handling capacity: Allows passage of solid particles up to 40% of the pump diameter (e.g., ZW100 model accommodates 40 mm particles).

Fiber resistance: Capable of processing long fibrous impurities up to 1.5 times the pump diameter.

Application Scenarios

Industries: Municipal sewage, chemical processing, paper mills, food processing, aquaculture.

Suitable media: Wastewater containing suspended solids, slurries, corrosive liquids, and fibrous mixtures.

Self-priming Sewage Pump VS Self-priming clean water Pump

Comparison Feature	Self-primingSewage Pump	Self-priming Clean Water Pump
Applicable Medium	Sewage, wastewater, and fluids containing solid particles, fibers, or suspended solids.	Clean water or liquids with physical and chemical properties similar to clean water (free of impurities).
Impeller Structure	Typically uses semi-open, open, or vortex impellers with wide channels to prevent clogging.	Usually uses closed impellers designed for higher hydraulic efficiency and head pressure.
Solid-Handling Capacity	High capacity to pass solid particles and fibers without easily clogging or jamming.	Narrow flow channels that are highly sensitive to impurities, which can cause blockages or wear.
Design & Maintenance	Features a larger casing and often includes a clean-out port or wear-resistant mechanical seals for easy debris removal.	Compact design without specialized clean-out ports, optimized strictly for clean fluid handling.

Q1: What industries and applications is the PWS Split-Type Stainless Steel Self-Priming Sewage Pump suitable for?

A: It is widely used in municipal sewage, chemical processing, paper mills, food processing, and aquaculture.

Q2: What types of liquids or media can the PWS Split-Type Stainless Steel Self-Priming Sewage Pump handle?

A: It is suitable for wastewater containing suspended solids, slurries, corrosive liquids, and fibrous mixtures.

Q3: How does the PWS Split-Type Stainless Steel Self-Priming Sewage Pump differ from a standard self-priming clean water pump?

A: Unlike clean water pumps (which use closed impellers and narrow flow channels for clear liquids), this sewage pump uses semi-open, open, or vortex impellers with wide channels to handle solid particles and fibers without clogging.

The Split-Type Stainless Steel Self-Priming Sewage Pump is a highly efficient self-priming transfer pump designed specifically for challenging sewage handling applications. As a self-priming water pump, it excels in automatically re-priming itself under lift conditions, eliminating the need for external auxiliary devices to evacuate air from the suction line. This feature makes it an ideal lift pump for sewage, capable of lifting fluid from a level below the pump and ensuring continuous, uninterrupted operation. The pump's stainless steel construction provides exceptional corrosion resistance, ensuring long service life even in harsh environments. It is widely used in municipal sewage discharge, industrial wastewater treatment, construction site drainage, and residential sewage systems, among other applications. With its reliable self-priming performance, strong sewage discharge capacity, and durable construction, this pump offers a cost-effective and efficient solution for all your sewage transfer needs.

Model meaning

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Model	Inlet/Outlet Dia. (mm)	Flow Rate (m³/h)	Head (m)	Power (kW)	Speed (r/min)	Suction Lift (m)
25ZW(L)8-15	25/25	8	15	1.5-2	2900	5
32ZW(L)10-20	32/25	10	20	2.2-2	2900	5
32ZW(L)9-30	32/25	9	30	3-2	2900	5
40ZW(L)20-15	40/32	20	15	2.2-2	2900	5
40ZW(L)10-20	40/32	10	20	2.2-2	2900	5
40ZW(L)15-30	40/32	15	30	3-2	2900	5
50ZW(L)10-20	50/40	10	20	2.2-2	2900	5
50ZW(L)20-15	50/40	20	15	2.2-2	2900	5
50ZW(L)18-22	50/40	18	22	3-2	2900	5
50ZW(L)15-30	50/40	15	30	3-2	2900	5
50ZW(L)20-35	50/40	20	35	5.5-2	2900	5
50ZW(L)20-40	50/40	20	40	7.5-2	2900	5
50ZW(L)20-50	50/40	20	50	11-2	2900	5
65ZW(L)30-18	65/65	30	18	4-2	2900	5
65ZW(L)30-18D	65/65	30	18	4-4	1450	5
65ZW(L)25-30	65/65	25	30	5.5-2	2900	5
65ZW(L)25-40	65/65	25	40	7.5-2	2900	5
65ZW(L)25-50	65/65	25	50	11-2	2900	5
65ZW(L)40-25	65/65	40	25	7.5-2	2900	5
65ZW(L)65-25	65/65	65	25	7.5-2	2900	5
80ZW(L)40-16	80/65	40	16	4-2	2900	5
80ZW(L)40-16D	80/65	40	16	4-4	1450	5
80ZW(L)50-15	80/65	50	15	5.5-2	2900	5
80ZW(L)65-25	80/65	65	25	7.5-2	2900	5
80ZW(L)50-30	80/65	50	30	11-2	2900	5
80ZW(L)80-35	80/65	80	35	15-2	2900	5
80ZW(L)40-50	80/65	40	50	18.5-2	2900	5
80ZW(L)50-60	80/65	50	60	22-2	2900	5
100ZW(L)80-20	100/80	80	20	7.5-4	1450	5
100ZW(L)100-15	100/80	100	15	7.5-4	1450	5
100ZW(L)100-20	100/80	100	20	11-4	1450	5
100ZW(L)100-30	100/80	100	30	22-2	2900	5
100ZW(L)80-45	100/80	80	45	30-2	2900	5
100ZW(L)80-60	100/80	80	60	37-2	2900	5
100ZW(L)80-80	100/80	80	80	45-2	2900	5
125ZW(L)120-20	125/125	120	20	15-4	1450	5
150ZW(L)180-14	150/125	180	14	15-4	1450	5
150ZW(L)150-20	150/125	150	20	15-4	1450	5
150ZW(L)180-20	150/125	180	20	18.5-4	1450	5
150ZW(L)180-30	150/125	180	30	30-4	1450	5
150ZW(L)180-35	150/125	180	35	37-4	1450	5
150ZW(L)180-38	150/125	180	38	45-4	1450	5
150ZW(L)180-45	150/125	180	45	55-4	1450	5
200ZW(L)280-14	200/150	280	14	22-4	1450	5
200ZW(L)280-20	200/150	280	20	37-4	1450	5
200ZW(L)280-25	200/150	280	25	45-4	1450	5
200ZW(L)280-28	200/150	280	28	55-4	1450	5
250ZW(L)420-14	250/200	420	14	45-4	1450	5
250ZW(L)420-20	250/200	420	20	55-4	1450	5
300ZW(L)800-14	300/250	800	14	55-4	1450	5
300ZW(L)800-20	300/250	800	20	75-4	1450	5

Complete Performance Curves & Dimensions Table: For full technical specifications, detailed performance curves, and precise dimensional drawings of all models, please download the complete product manual.

The Split-Type Stainless Steel Self-Priming Sewage Pump is designed for quick and efficient installation in demanding wastewater applications. As a heavy-duty self priming transfer pump, its innovative split-type casing allows for easy maintenance access without disturbing pipeline connections.

Key installation features of this self priming water pumps system include:

Automatic priming capability for reliable dry-start operation

Corrosion-resistant stainless steel construction ideal for harsh sewage environments

Flexible installation options including wet-well or dry-pit configurations

The pump's unique air-water separation chamber ensures fast priming, while its robust self priming water pumps design maintains high efficiency when handling contaminated fluids with fibrous materials or abrasive particles.

Installation instructions

1. The weight of the pipeline should not be added to the pump during installation, and there should be their respective supporting bodies, so as not to deform the pump and affect the operating performance and life.

2. The pump and the motor are of integral structure, it is very convenient to install them without the need to find the right one.

3. The ground bolts must be tightened during installation to avoid the effect of vibration on the performance of the pump during starting.

4. Before installing the pump, the pump flow channel should be carefully checked for hard materials (such as stones, iron particles, etc.) that may affect the operation of the pump, so as to avoid damaging the impeller and the pump body when the pump is running.

5. For the convenience of maintenance and safety, install a regulating valve on each of the import and export pipelines of the pump and a pressure gauge near the outlet of the pump to ensure that the pump operates within the rated head and flow rate to ensure the normal operation of the pump and increase the service life of the pump.

6. pump for suction occasions, should be equipped with a bottom valve, and the inlet pipeline should not have too many bends, while there shall be no water leakage, air leakage.

7. Discharge piping such as backstop valve should be installed outside the gate valve.

8. After installation, the impeller should have no friction sound or jamming phenomenon when the pump shaft is moved, otherwise, the pump should be disassembled to check the reason.

9. The installation of the pump is divided into hard coupling and flexible coupling installation.

PWS’s Split - Type Stainless Steel Self - Priming Sewage Pump stands out as a top - tier solution. As a lift pump for sewage, it has to perform under varying operational conditions, such as different flow rates and head requirements. To truly understand and optimize its performance, the pump curve graph is an indispensable tool. This graphical representation offers a comprehensive view of how the pump behaves across a range of scenarios, illustrating the relationship between flow rate, head, power consumption, and efficiency. By analyzing the pump curve of this stainless steel self - priming sewage pump, engineers and operators can make informed decisions about its selection, installation, and operation, ensuring that it meets the specific demands of sewage transfer applications efficiently and reliably.

Reference Product Model: 80ZW80-35

Medium: Clean water

Rated Voltage: 380V

Inlet Diameter: 80mm

Outlet Diameter: 80mm

Rated Power: 15kW

Water Temperature: 20.0 C

Outlet Gauge Distance: 1.00

Motor Efficiency: 93.3%

The Split Type Stainless Steel Self Priming Sewage Pump is a high-performance self priming transfer pump, with its core components made of high-quality stainless steel precision manufacturing to ensure long-term reliable operation under harsh working conditions. Each component of this self priming water pump has been carefully designed and rigorously tested, enabling it to efficiently handle various complex media such as solid particles and fibers. It is particularly suitable for harsh environments such as municipal drainage and industrial wastewater treatment. The split structure design is more convenient for daily maintenance and component replacement.

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WENZHOU PUMP WISE FLUID EQUIPMENT CO., LTD.

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Sales Manager：+39 389 949 9067

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

winnie@pumppioneer.com

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