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

Mid-open diesel engine pump unit

Flow rate: 72–10,800 m³/h

Head: 10–253 m

Power: 11–2240 kW

Efficiency: 69%-90%

Pump weight: 110–25,600 kg

Cavitation margin: 1.79–10.3 m

Price: 202,000–2 million

The S-type split-case pump driven by a diesel engine, compared with other pumps of the same type, features a long service life, high efficiency, a reasonably designed structure, low operating costs, and convenient installation and maintenance. It is an ideal pump for use in fire protection, air conditioning, chemical processing, water treatment, and other industries.

Hotline:

+86 0731-88632200

classification：

Diesel engine 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 S-type split-case diesel-driven pump unit is an emergency water supply and drainage device powered by a diesel engine, driving a new high-performance, double-suction, split-case centrifugal pump. It is primarily suitable for applications involving liquid transportation in municipal water plants, air-conditioning circulating water systems, heating network systems, building water supply, irrigation, drainage pumping stations, power plants, industrial water supply systems, fire protection systems, shipbuilding, mine water supply and drainage, and other similar scenarios. Compared with other pumps of the same type, the S-type split-case pump boasts advantages such as long service life, high efficiency, reasonable structural design, low operating costs, and ease of installation and maintenance. It is an ideal pump choice for industries including fire protection, air conditioning, chemical processing, water treatment, and others.

Product Parameters

　　The design pressure of the pump body for medium-capacity diesel engine-driven pumps from Zhongkai is 1.6 MPa and 2.0 MPa. To meet the diverse requirements of users worldwide, the inlet and outlet flanges of the pump body can be selected according to standards such as ANSI, PN, and IS. Both the inlet and outlet flanges of the pump body are located on the lower pump casing, allowing the rotor to be removed without disassembling the system piping, thus facilitating maintenance. Some pump bodies feature a dual-flow channel design, which helps reduce radial forces and thereby extends the service life of both mechanical seals and bearings.

　　The hydraulic design of the impeller for the medium-flow diesel engine-driven pump at Zhongkai employs advanced CFD technology, thereby enhancing the hydraulic efficiency of the S pump. The impeller undergoes dynamic balancing to ensure smooth operation of the S pump. The shaft features a relatively thick diameter and a shorter bearing span, which reduces shaft deflection and extends the service life of both the mechanical seal and the bearings.

　　The shaft sleeve for the Zhongkai diesel engine pump can be made from a variety of different materials to prevent corrosion and wear of the shaft. The shaft sleeve is replaceable. A replaceable wear ring is installed between the pump body and the impeller to protect both components from wear. This wear ring is easy to replace, resulting in low maintenance costs while ensuring proper operating clearances and high operational efficiency. The pump can be fitted with either packing seals or mechanical seals, and the sealing device can be replaced without removing the pump cover.

　　The unique bearing housing design of the mid-open-type pump unit allows the bearings to be lubricated either with grease or thin oil. The bearings are designed for a service life of over 100,000 hours and can also accommodate double-row thrust bearings and sealed bearings.

　　Depending on the user’s specific requirements, the materials for S-type split-case pumps can include copper, cast iron, ductile iron, 316 stainless steel, 416 stainless steel, duplex steel, Hastelloy, Monel alloy, titanium alloy, and Alloy 20, among others. S-type pumps are available in two installation configurations: horizontal and vertical. Vertical installation helps reduce the footprint of the pump.

Performance Range of Mid-Open-Type High-Flow Diesel Engine Pump Units

　　Pump inlet diameter DN: 100–1400 mm

　　Flow rate Q: Up to 10,800 m³/h

　　Head H: Up to 253 m

　　Working pressure P: Up to 2.5 MPa

　　Operating temperature T: Up to 135°C

Structural Description of the Mid-Open-Type High-Flow Diesel Engine Pump Unit

　　The S and SH series mid-split diesel pump is a single-stage, double-suction, volute-type centrifugal pump with an axially split pump casing. Both the suction inlet and discharge outlet are located below the pump shaft axis and are oriented horizontally. The main components of the pump include the pump body, pump cover, impeller, shaft, double-suction sealing ring, and others. On the water inlet and outlet flanges, there are threaded holes for installing vacuum gauges and pressure gauges; at the bottom of the inlet and outlet flanges, there are drain pipe threaded holes. The flanges are manufactured according to GB standards, but can also be produced in accordance with ISO, DIN, BS, or ANSI standards. After passing balance testing, the impeller is fixed onto the shaft using a sleeve and a sleeve nut; its axial position can be adjusted via the sleeve nut. The axial forces acting on the impeller are balanced due to the symmetrical arrangement of its blades. The pump shaft is supported by two sets of rolling bearings mounted at both ends of the pump body. The bearings are lubricated with grease. The pump body is equipped with a double-suction sealing ring that is easy to remove and replace. The pump is directly driven by an electric motor through an elastic pin coupling or a metal disc coupling. The prime mover can also be an internal combustion engine or a gas turbine. The shaft seal can be either a packing seal or a mechanical seal. Cooling and flushing water for the shaft seal can enter the seal chamber either through grooves on the open face of the pump cover or via an externally connected cooling water pipe. During maintenance, there is no need to disassemble the inlet and outlet pipes or the electric motor, making repairs convenient. According to user requirements, the pump’s structural dimensions can be modified.

　　Rotation Direction: When viewed from the motor end, the pump shaft rotates clockwise (i.e., the pump inlet is on the right side). According to user requirements, the rotation direction can be reversed to counterclockwise. A pump with reversed rotation is indicated by adding the letter F to the end of the pump model number.

　　Material of Pump Components: Unless the user specifies special requirements, the main components of a single-stage double-suction centrifugal pump (mid-section open pump)—including the pump body, pump cover, impeller, double-suction sealing ring, and shaft sleeve—are made of gray cast iron; the shaft is made of 45 carbon steel. According to the user’s needs, the shaft may also be made of materials such as 2Cr13 or 40Cr. Other major flow-path components can be made of materials including ductile iron, cast steel, bronze, and stainless steel.

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.

Chemical diesel engine pump unit

Pipeline diesel engine pump unit

Chemical diesel engine pump unit

Pipeline diesel engine pump unit

+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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Hot Products

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

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