Changsha Zhonglian Pump Industry Co., Ltd.

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Having 26 series -312 varieties - over 1000 pump models

Focused on water pump research and development manufacturing for 36 years

Free training for operation and maintenance personnel/free installation guidance/free provision of installation drawings

Self-balancing multistage pump

Multistage pump

Coal Mine Safety Certified Multi-stage Pump

Vertical multistage pump

Integrated pump station

Vacuum pump

Fire pump

Constant-pressure water supply equipment

Other pumps

Genuine accessories

PW Horizontal Sewage Pump

Traffic: 36–180 m³/h

Head: 8.5-48.5m

Power: 4-30kw

Efficiency: 20%-55%

Rotational speed: 960-2950r/min

Shaft power: 2.47-92kw

Price: 4,900–51,500

The PW and PWF horizontal sewage discharge pumps are single-stage, single-suction, cantilever centrifugal sewage pumps. The pump’s suction port is oriented horizontally along the shaft axis, while the discharge port can be configured either horizontally or vertically as required. The pump primarily consists of components such as the pump cover, pump casing, impeller, shaft seal, shaft, and bearing bracket. The shaft seal adopts a novel double-end-face mechanical seal design. The pump and motor are mounted on a common baseplate and driven directly by the motor via an elastic coupling. This pump features high efficiency and significant energy savings.

Hotline:

+86 0731-88632200

classification：

Wastewater pump

keyword：

Horizontal Single-Stage Fire Pump

Product consultation

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

　　The PW and PWF horizontal sewage discharge pumps are single-stage, single-suction, cantilever centrifugal sewage pumps. The pump’s suction port is oriented horizontally along the axis, while the discharge port can be configured either horizontally or vertically as required. The pump primarily consists of components such as the pump cover, pump casing, impeller, shaft seal, shaft, and bearing bracket. The shaft seal adopts a novel double-end-face mechanical sealing structure. The pump and motor are mounted on a common baseplate and driven directly by the motor via an elastic coupling. This pump boasts advantages including high efficiency, significant energy savings, smooth operation, reliable performance, and convenient maintenance.

Horizontal sewage discharge pump

　　All of our sewage pumps are designed and optimized using computer-aided methods. Our company boasts strong technical expertise, extensive manufacturing experience, and sophisticated testing facilities, ensuring the consistent reliability of our product quality. (Materials: cast iron, stainless steel)

Product Parameters

Technical Parameters and Model Designations for PW Horizontal Sewage Pump:

　　Flow rate: 36–180 m³/h;

　　Head: 8.5–48.5 m;

　　Motor power: 4-30 kW;

　　Rotational speed: 960–2950 rpm;

　　Caliber: φ65–φ100;

　　Medium temperature: ≤100℃.

Meaning of PW Horizontal Sewage Pump Model

Application scope of PW horizontal sewage discharge pumps:

　　1. The PW horizontal sewage pump is designed to handle sewage, wastewater containing suspended solid particles, long-fiber materials, and domestic wastewater. The pump body is made of high-quality cast iron, and the medium temperature does not exceed 100℃.

　　2. The PWF horizontal sewage pump is capable of conveying wastewater containing acidic, alkaline, or other corrosive substances. It is widely used in industries such as chemical engineering, petroleum, light industry, food processing, pharmaceuticals, brewing, environmental protection, and wastewater treatment. The pump body and all flow-through components are made of 304 stainless steel, and the medium temperature should not exceed 100℃.

Structural Diagram and Description of the PW Horizontal Sewage Pump:

Structural Diagram of the PW Horizontal Sewage Pump

　　1 Pump cover, 2 Pump body, 3 Impeller, 4 Shaft seal housing, 5 Shaft seal box, 6 Gasket, 7 Bushing (not included in 4PW), 8 Oil seal, 9 Bushing, 10 Oil level indicator, 11 Bearing housing, 12 Bearing cover, 13 Flat key, 14 Elastic ring, 15 Shaft, 16 Nut, 17 Washer, 18 Seal ring

　　This horizontal sewage pump mainly consists of the following components: pump cover (1), pump body (2), impeller (3), shaft (15), shaft seal housing (4), bearing housing (11), and coupling assembly, as shown in Figure 1: Structural Diagram.

　　The pump outlet can be oriented vertically upward or horizontally. This pump is directly driven by an elastic coupling (or, if required, can be equipped with belt drive instead).

　　The impeller has only two curved blades, resulting in a wide flow passage that can accommodate typical suspended particles.

　　The impeller has four secondary blades on its back side to balance the axial thrust. During manufacturing, the impeller undergoes static balancing tests.

　　The pump rotates clockwise when viewed from the drive end.

　　The bearings in the bearing housing are lubricated with thin oil. The oil level is indicated by the oil gauge, and the oil level should be at the normal oil level line.

　　This pump’s shaft seal uses an oil seal, offering excellent sealing performance and convenient replacement.

　　The sealing ring is made of cast iron and is fixed to the pump cover; it can be replaced with a spare part once worn out.

　　The clearance f between the pump cover and the impeller inlet end, and the assembly clearance T between the sealing ring and the impeller.

Wastewater discharge pump start-up, shutdown, and operation:

　　1. Start

　　1) Check whether the bearing housing is properly lubricated and whether the oil level is within the normal range indicated by the oil level mark.

　　2) Check whether the motor’s rotation direction matches the pump’s rotation direction.

　　3) Close the discharge outlet gate valve and the pressure gauge cock, and at the same time, fill the pump’s suction pipe with water through the screw hole on the upper part of the pump body.

　　4) Start the motor and open the pressure gauge cock.

　　5) Once the pump reaches its normal operating speed and the pressure gauge indicates the corresponding pressure, open the vacuum gauge cock and gradually open the gate valve on the drain line to the desired extent.

　　2. Stop

　　1) First, slowly close the gate valve on the outlet pipeline, then disconnect the power supply.

　　2) During freezing seasons, after shutting down the pump, open the square screw plug at the bottom of the pump body to drain any accumulated water, thus preventing it from freezing and cracking.

　　3) If the device is not used for an extended period, all components should be disassembled, thoroughly cleaned, and coated with rust-preventive oil on moving surfaces before being stored properly.

　　3. Operation

　　1) During pump operation, it is essential to closely monitor the instruments, bearing temperature, packing leakage, as well as the pump’s vibration and any unusual noises. If any abnormalities are detected, they should be addressed promptly.

　　2) The maximum temperature of the bearing must not exceed 75℃.

　　3) The bearing oil level should be maintained at the normal oil level mark; it must not be too high or too low. If the oil level is too low, add oil promptly.

　　4) If the clearance between the sealing ring and the impeller exceeds the following specified values, the sealing ring should be replaced with a new one.

　　When the diameter of the suction port is ≤100mm, the total clearance in the diameter direction shall be ≥1.5mm.

　　When the diameter of the suction port exceeds 100 mm, the total clearance in the diameter direction shall be ≥ 2 mm.

Wastewater discharge pump assembly and disassembly:

　　First, check whether each component and part has any defects that might affect assembly. Only after cleaning them thoroughly can you proceed with assembly.

　　1. Prepare the paper gasket, wire plug, and pipe plug, and install each one onto its corresponding component.

　　2. Install the sealing ring, shaft seal housing, oil level indicator and oil hole cover, and felt pack respectively into the pump cover, bearing housing, bearing box, and bearing cover.

　　3. First, install the bearings onto both ends of the shaft, then insert them together into the bearing housing, and finally fit the bearing end covers.

　　4. Sequentially install the bearing housing, bearing (no 4PW), oil seal ring and washer, impeller, gasket, and impeller nut, and tighten them securely. Then, assemble the pump body and pump cover.

　　Disassembly and assembly must be performed in the reverse order.

Precautions for Sewage Drainage Pumps:

　　1) Support brackets shall be provided for the pump’s inlet and outlet pipes; the pump body itself must not be used as a support.

　　2) A gate valve shall be installed on the outlet pipeline;

　　A general debris screen should be installed at the inlet of the pump suction line to prevent large stones and other objects from being sucked into the pump and damaging the impeller blades.

Friendly reminder: For performance parameters, please refer directly to the pump selection page.

Why choose us?

Changsha Zhonghlian Pump Industry Co., Ltd. was founded in 1989 and was independently established after the restructuring of Changsha Water Pump Factory. It is a comprehensive national high-tech enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Equity Exchange on December 31, 2019, with the abbreviation "Zhonghlian Pump Industry" and the equity code: 600275HN. It is currently a key backbone enterprise in China's centrifugal pump industry and one of the major professional manufacturers of multi-stage pumps in the country. The headquarters is located in Changsha City, Hunan Province, a historical and cultural city in China.

41000 m²

Square meters of land area

100 %

100% factory pass rate

41000 m²

Square meters of land area

100 %

100% factory pass rate

What is your typical delivery time?

Models in stock can be shipped the next day at the latest. All others are custom-made, with lead times generally ranging from 7 to 90 days depending on the product size and project specifics. Please contact our sales manager for details: 0731-88632200 。

Do you have centrifugal pumps in stock?

Centrifugal pumps come in numerous models and configurations. Except for a small number of high-volume, standard models that are in stock, the vast majority are not stocked and are customized products. We need to select a pump based on your site's flow rate, head, media temperature, pH value, and installation conditions, etc., to determine the pump model and configuration before we can submit an order to the factory for production.

What information should I provide when requesting a quote?

Generally, to obtain an accurate quotation, we recommend providing us with the following information: pump flow rate, head, on-site operating voltage and frequency, temperature, pH value, and solid particle content of the fluid being conveyed, and on-site installation conditions (horizontal or vertical installation), etc.

If you are not sure, don't worry, our business managers will assist you in determining this.

What products do you mainly produce?

Zhonglian Pump Industry manufactures various large industrial centrifugal pumps. Main products include: self-balancing multi-stage pumps, multi-stage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condensate pumps, etc.

Could you help me with the selection?

Certainly! If the water pump model is not selected accurately, there will be big problems. If you choose a smaller one, it won't meet your needs; if you choose a larger one, it will waste electricity and fuel, increasing your costs.

Why is it so slow to get a price quote?

Because centrifugal pumps are non-standard customized products with many models, the price range is also very large. Even for the same model, the price difference is also very large due to different materials and configurations. Taking the most common water pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clarify the relevant information to give you an accurate price. Normally, if you provide relatively comprehensive information, we can quote within 5 minutes.

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+86 0731-88632200

Export Trade/Technical Support:

+86 153-4831-2290

Head Office Email:

zoomlian@yeah.net

No. 210, Huanbao Zhong Road, Yuhua District, Changsha City, Hunan Province, Leowoju Wisdom Valley Building B, 8th Floor

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Self-balancing multistage pump

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Coal Mine Safety Certified Multi-stage Pump

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Constant-pressure water supply equipment

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