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

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IH Horizontal Single-Stage Single-Suction Stainless Steel Chemical Pump

IH Horizontal Single-Stage Single-Suction Stainless Steel Chemical Pump

Traffic: 3.4–1080 m³/h

Head: 3-200m

Power: 0.55-160kw

Efficiency: 16%–85%

Pump weight: 44-160kg

Cavitation margin: 2.0-6.0m

Price: 0.39–6.78 ten thousand

The IH-type stainless steel chemical centrifugal pump is a horizontal, single-stage, single-suction, cantilevered corrosion-resistant chemical centrifugal pump. It was jointly designed and developed by the technical staff of Changsha Zhonglian Pump Industry Co., Ltd., a leading manufacturer of corrosion-resistant chemical pumps, in collaboration with domestic pump experts, using an outstanding hydraulic model developed in China.

Hotline:

+86 0731-88632200

classification：

Chemical pump

keyword：

Horizontal Single-Stage Fire Pump

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

　　The IH-type stainless steel chemical centrifugal pump is a horizontal, single-stage, single-suction, cantilevered corrosion-resistant chemical centrifugal pump. Its marked rated performance points and dimensions comply with the international standard ISO 2858-1975(E). This pump serves as an energy-saving replacement and upgrade for the F-type corrosion-resistant pumps. Designed in accordance with the performance specifications, technical requirements, and testing methods for energy-efficient pumps, this series of chemical centrifugal pumps is one of the energy-saving pump products promoted in China. It was jointly developed by the technical staff of Changsha Zhonglian Pump Industry Co., Ltd., a leading manufacturer of corrosion-resistant chemical pumps, and domestic pump experts who selected an outstanding hydraulic model from China. The pump is suitable for conveying clean water and liquids with physical and chemical properties similar to water, provided that these liquids do not contain solid particles. It is widely used in industrial, agricultural, and municipal drainage systems, as well as fire-fighting water supply applications. The pump is designed to handle corrosive media or media with physical and chemical properties similar to water at temperatures ranging from 20°C to 105°C.

Performance Range and Model Designations of IH Horizontal Single-Stage Single-Suction Stainless Steel Chemical Centrifugal Pumps

● Flow rate Q: 3.4–1080 m³/h	● Rotational speed n: 980, 2900, 1450 r/min	● Import diameter: 50–200 mm
● Head H: 3–200 m	● Rated power: 0.55–160 kW	● Maximum working pressure: 1.6 MPa

The IH-type chemical pump has 29 basic models, of which 22 are dual-speed (2900 and 1450 rpm). After undergoing diameter modifications through A- and B-type impeller designs, the number of specifications reaches 112.

　　Note: In addition to the materials listed in the table above, the manufacturer may also select materials suitable for producing this series of chemical pumps according to the user’s requirements. The selected materials and their corresponding designations shall, in principle, comply with GB 2100-80. For materials for which the national standards have not yet specified designations, it is permissible to adopt internationally or domestically recognized material designations (such as those stipulated by industry or factory standards).

　　Model Description: IH50-32-125A

　　IH – Single-stage, single-suction chemical pump

　　50 – The pump suction inlet diameter is 50 mm.

　　32 – The pump outlet diameter is 32 mm.

　　125 – The nominal diameter of the impeller is 125 mm.

　　A – Change in the impeller outer diameter

Product Features of IH Horizontal Single-Stage Single-Suction Stainless Steel Chemical Centrifugal Pump

　　IH chemical pumps feature a reasonably designed hydraulic performance layout, high reliability, compact size, light weight, excellent cavitation resistance, low power consumption, convenient operation and maintenance, and high efficiency. The IH single-stage chemical pump has a horizontal structure, and its structural design can basically meet the requirements of all pipeline installations.

　　The IH chemical pump is designed to handle media with temperatures ranging from -20℃ to 105℃. When required, it can be equipped with a double-end-face seal cooling system, enabling it to convey media at temperatures from 20℃ to +280℃. This pump is suitable for use in industries such as chemical processing, petroleum, metallurgy, power generation, papermaking, food processing, pharmaceuticals, environmental protection, wastewater treatment, and synthetic fibers, where it can transport various corrosive or non-contaminating media similar to water.

Structural Description of the IH Horizontal Single-Stage Single-Suction Stainless Steel Chemical Centrifugal Pump

Structural diagram of IH-type chemical centrifugal pump

　　The impeller cover of the IH chemical centrifugal pump is secured to the intermediate support via a locating flange. The pump cover is then clamped in place between the pump body and the intermediate support by means of a mating flange connection. The pump features axial suction and radial discharge, and it is supported on feet, allowing direct mounting onto a base. The suspension assembly is fixed to the intermediate support via a locating flange and is supported on the base by suspension brackets. To facilitate disassembly, an extended coupling has been designed, enabling maintenance without having to remove the inlet and outlet piping, as well as the pump body and motor. By simply removing the middle coupling component, the rotor assembly can be extracted for inspection and maintenance. This is a structurally standardized design commonly used worldwide.

　　Rotation direction of the IH chemical centrifugal pump: The pump is directly driven by an electric motor via an extended coupling. When viewed from the motor end, it rotates in a clockwise direction.

　　Gland Seal: The pump cover is equipped with a gland chamber that uses a soft packing seal. A water supply at a certain pressure can be introduced into the gland chamber for sealing cooling, lubrication, and cleaning purposes.

　　Mechanical seals: There are two types—single-face mechanical seals and double-face mechanical seals. A certain pressure of water is introduced into the sealing chamber to flush and lubricate the friction surfaces at both ends, while also serving a cooling function.

　　The IH-type stainless steel chemical centrifugal pump employs either packing seals or mechanical seals, which can be selected by the user according to specific requirements. Additionally, as needed, seal types with sealing cavity dimensions and other structural features compliant with ISO 3069 standards may also be adopted—for example, mechanical seals equipped with bellows and auxiliary impeller seals, among others.

IH Type Stainless Steel Chemical Centrifugal Pump Instructions for Use

　　1. Preparations Before Starting

　　(1) Before starting up, the pump and the site must be thoroughly cleaned.

　　(2) Check whether the lubricant level inside the bracket is appropriate (the oil level should be about 2 mm above the centerline of the oil-level gauge) and ensure that the oil-level gauge is in good condition.

　　(3) Before connecting the coupling, check the rotation direction of the prime mover. After confirming that it matches the pump’s rotation-direction arrow, connect the coupling properly.

　　(4) After installing the mechanical seal, packing, and coupling, you should be able to turn the pump shaft smoothly by hand without any rubbing or scraping. Also, make sure to install the coupling’s protective guard properly.

　　(5) When the pump is used in suction mode, it should be primed or evacuated before starting. When the pump is used in backflow mode, it should be completely filled with the liquid being conveyed before starting; after removing all air from the pump, close the gate valve on the discharge pipe.

　　(6) Before starting, check whether the foundation bolts are loose, whether the gland is skewed, and whether the lubricating oil and cooling water supplies are adequate.

　　2. Start-up

　　(1) Close the inlet and outlet pressure (or vacuum) gauges and the discharge valve. (If a bypass line is present, close it as well.) Start the motor—preferably by jogging it first to confirm that the pump is rotating in the correct direction before starting full operation. Then, open the inlet and outlet pressure (or vacuum) gauges. Once the pump reaches its normal speed and the gauges indicate the corresponding pressure, slowly open the discharge valve and adjust it to the desired operating conditions. Under the condition that the discharge pipeline is closed, the pump must not run continuously for more than 3 minutes.

　　(2) During the startup process, continuously monitor the power reading of the prime mover and the vibration condition of the pump. The vibration amplitude should not exceed 0.06 millimeters; the measurement point is the bearing housing.

　　(3) Sealing condition: Mechanical seals should show no leakage or overheating, and packed gland seals should exhibit a continuous dripping flow.

　　3. Run

　　(1) Regularly check the temperature rise of the pump and motor (the bearing temperature rise should not exceed 75℃) as well as the oil level in the oil gauge. (Generally, the lubricating oil should be completely replaced every 1,500 hours of operation.)

　　(2) Do not use the suction valve to regulate flow, as this could lead to cavitation.

　　(3) The pump should not be operated continuously at a flow rate lower than 30% of the design flow rate. If continuous operation under such conditions is unavoidable, a bypass pipe should be installed at the pump outlet to discharge the excess flow.

　　(4) Pay attention to whether there are any unusual noises during pump operation. If you detect any abnormal conditions, promptly eliminate the cause or stop the pump for inspection.

　　4. Stop

　　(1) Slowly close the gate valve on the discharge pipeline (if the pump is used in backflow conditions, also close the gate valve on the suction pipeline), and turn off the switches for all instruments.

　　(2) Disconnect the power supply

　　(3) If external liquid supply is used for sealing, the external liquid supply valve must also be closed.

　　(4) If the ambient temperature falls below the liquid’s freezing point, drain all the liquid from the pump to prevent it from freezing and cracking.

　　(5) If the pump is to be left idle for an extended period, in addition to draining all corrosive liquids from the pump, all components should be disassembled and thoroughly cleaned—especially the sealing chamber. Ideally, the pump should be removed, cleaned, and then reassembled. Besides applying oil for rust prevention and sealing the pump’s inlet and outlet ports, it’s also important to conduct regular inspections.

IH Type Stainless Steel Chemical Centrifugal Pump Mechanical Seal Maintenance

　　1. Since mechanical seals are generally designed for use in clean media free of suspended particles, newly installed piping systems and liquid storage tanks should be thoroughly flushed to prevent solid impurities from entering the sealing faces of the mechanical seal and causing it to fail.

　　2. In media prone to crystallization, when using mechanical seals, pay attention to frequent flushing. Before restarting the equipment after a shutdown, be sure to thoroughly clean any crystals that have formed on the mechanical seal.

　　3. When disassembling the mechanical seal, proceed with care and avoid using hand hammers or metal tools to strike it, as this could damage the sealing surfaces of the moving and stationary rings.

　　4. If dirt cannot be removed during disassembly, try to clean it off and rinse thoroughly before proceeding with the disassembly, so as to avoid damaging the sealing components.

　　5. Before installing the mechanical seal, check all sealing components for any signs of failure or damage. If any are found, they should be repaired or replaced.

　　6. The mating friction sealing surfaces of the rotating ring and the stationary ring must be carefully inspected, and no defects—such as even the slightest scratches or dents—are permitted. All component parts, including the pump body, impeller, and seal chamber, must be thoroughly cleaned before assembly. In particular, the end faces of both the rotating and stationary rings should be meticulously wiped clean with a clean, soft cloth or cotton gauze, and then coated with a layer of clean grease or machine oil.

　　7. During assembly, be sure to eliminate any deviations. When tightening screws, apply even pressure to avoid misalignment and prevent sealing failure.

　　8. Adjust the compression of the spring correctly. After the pump is installed, when you manually turn the rotor, you should feel that the sealing spring has a certain amount of compression yet still rotates smoothly and freely without any sensation of tightness or binding. If it feels too tight or impossible to turn, you should loosen the spring slightly.

　　9. For mechanical seals equipped with external flushing, before starting the pump, first turn on the flushing liquid to ensure that the seal chamber is completely filled with sealing fluid. When stopping the pump, first shut down the pump and then close the seal flushing liquid.

Product Parameters

Technical Parameter Table for IH Type Stainless Steel Chemical Centrifugal Pumps

Model	Traffic	Head height	Efficiency	Shaft power	Rotational speed	Motor power
Model	(m³/h)	(m)	(%)	(kw)	(rpm)	(kW)
IH50-32-125(2900)	12.5	20	51	1.34	2900	2.2
IH50-32-125A(2900)	11.3	16.4	50	1.01	2900	1.1
IH50-32-160(2900)	12.5	32	46	2.37	2900	3
IH50-32-160A(2900)	11.3	26.4	44	1.85	2900	0.75
IH50-32-200(2900)	12.5	50	39	4.37	2900	5.5
IH50-32-200A(2900)	11.3	41	38	3.32	2900	4
IH50-32-250(2900)	12.5	80	33	8.26	2900	11
IH50-32-250A(2900)	11.7	70	32	6.97	2900	11
IH50-32-250B(2900)	11	62	30	6.19	2900	5.5
IH50-32-125(1450)	6.3	5	45	0.19	1450	0.55
IH50-32-160(1450)	6.3	8	40	0.34	1450	0.75
IH50-32-200(1450)	6.3	12.5	33	0.65	1450	1.1
IH50-32-250(1450)	6.3	20	27	1.27	1450	2.2
IH50-32-125A(1450)	5.7	4.1	43	0.15	1450	0.55
IH50-32-160A(1450)	5.7	6.6	37.1	0.28	1450	0.75
IH50-32-200A(1450)	5.7	10.3	31	0.52	1450	1.1
IH50-32-250A(1450)	5.9	17.5	25	1.13	1450	1.5
IH65-40-200(2900)	25	50	52	6.55	2900	11
IH65-40-200A(2900)	22.7	41	50	5.07	2900	5.5
IH65-40-250(2900)	25	80	46	11.85	2900	15
IH65-40-250A(2900)	23.4	74.8	45	10.6	2900	15
IH65-40-250B(2900)	22	61.8	44	8.42	2900	15
IH65-40-315(2900)	25	125	39	21.83	2900	3
IH65-40-315A(2900)	23.4	109.5	38	18.37	2900	18.5
IH65-40-315B(2900)	22	96.5	37	15.64	2900	15
IH65-40-200(1450)	12.5	12.5	46	0.93	1450	1.5
IH65-40-250(1450)	12.5	20	39	1.75	1450	3
IH65-40-315(1450)	12.5	32	33	3.3	1450	5.5
IH65-40-200A(1450)	11.3	10.3	44	0.72	1450	1.1
IH65-40-250A(1450)	11.7	17.5	37.9	1.47	1450	2.2
IH65-40-315A(1450)	11.7	28	33	2.71	1450	4
IH65-50-125(2900)	25	20	62	2.2	2900

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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