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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
SY-type oil transfer double-suction mid-open pump
Flow rate: 88–8,000 m³/h
Head: 12–1500 m
Power: 22-132 kW
Efficiency: 68%-86%
Pump weight: 150–831 kg
Cavitation margin: 2.0–6.6 m
Price: 19,500–299,000
The SY-type double-suction, mid-open centrifugal oil pump is a horizontal, single-stage, double-suction, mid-open pipeline centrifugal oil pump. Developed by Zhonglian Pump Industry—a manufacturer of double-suction, mid-open pumps—this product leverages the company’s technological strengths in aerospace liquid propulsion and integrates advanced domestic and international technologies and experience. It features large flow rates and a comprehensive range of model specifications, making it suitable for conveying petroleum products such as crude oil, gasoline, and diesel with temperatures not exceeding 100°C, as well as other media that are free of impurities and non-corrosive.
Hotline:
Middle-open pump
Horizontal Single-Stage Fire Pump
Product Overview
The SY-type double-suction, mid-split centrifugal pump for oil transfer is a horizontal, single-stage, double-suction, mid-split pipeline centrifugal pump. Developed by Zhonglian Pump Industry—a manufacturer of double-suction, mid-split pumps—this product leverages the company’s technological advantages in aerospace liquid propulsion and integrates advanced domestic and international technologies and experience. Its design and manufacturing process complies with the requirements of API610-2004, “Centrifugal Pumps for Petroleum, Heavy Chemical, and Natural Gas Industries.”
SY-type oil transfer double-suction Middle-open pump It is primarily suitable for conveying petroleum products such as crude oil, gasoline, and diesel with temperatures not exceeding 100℃, as well as other media that are free of impurities and non-corrosive. It is widely used in mid-open centrifugal pumps for oil transportation in refineries, the chemical industry, and the petrochemical industry. It is also suitable for mid-open centrifugal pumps used in power plants, steel mills, seawater desalination systems, fire protection systems, and oilfield water injection systems.
SY Model Oil Transfer Double-Suction Split-Casing Centrifugal Pump — Model Description
Model: 200SY95
200 - Outlet diameter
SY—Single-stage, double-suction oil transfer pump with double-suction and mid-open design
95 - Head
Features of SY-Type Oil-Transfer Double-Suction Split-Casing Centrifugal Pump Units
SY-type oil transfer double-suction Middle-open pump The pump is designed in accordance with the API 610, Tenth Edition, BB1 or BB3 structural configuration. The pump’s suction and discharge ports are located on the same casing (lower pump body) and arranged horizontally on opposite sides of the casing. When opening the cover for maintenance, there is no need to remove the inlet and outlet pipelines, making repairs straightforward.
Ø Explosion-proof design of the unit
All oil transfer pumps, regardless of their specifications, feature explosion-proof designs—from pump structural components and motors, to couplings, auxiliary pipelines, and monitoring instruments, as well as the skid-mounted base—enabling them to operate safely in hazardous environments classified as Zone 2, Group T4.
The materials for the double-suction, mid-open oil pump shall be selected from Table S-6 in Appendix H of API Standard 610, 10th Edition, which are suitable for conveying flammable and explosive media. The motor shall be an explosion-proof motor/non-sparking motor with explosion-proof rating ExdⅡBT4/ExnⅡBT4, protection class IP55, insulation class F, and junction box protection class IP55. The coupling guard is made of 316L stainless steel plate, and the skid-mounted common base is welded from steel, meeting the explosion-proof requirements specified in API Standard 610, 10th Edition, for the conveyance of flammable and explosive media.
The unit is equipped with grounding wires for the motor, base, and other components, and static-charge bypass cables are installed between flanges. All electrical components, including electrical instruments and explosion-proof enclosures, are selected from products with an explosion-proof rating of ExdⅡBT4 or higher. All cables are routed through explosion-proof flexible conduits.
The above-mentioned measures can ensure the explosion-proof safety of the unit's operation.
Ø Reliability of the unit
By means of a rational layout and design of the pump structure, as well as appropriate process measures, we ensure the operational reliability of the pump unit and meet the environmental protection requirements for the pump.
By leveraging the self-balancing capability of the impeller itself and its rational distribution, the axial force is reduced. Moreover, through the special design of the volute flow passages and the optimized arrangement of flow passages at each stage, the radial forces acting on the rotor are minimized. As a result, the thrust bearings and radial bearings can operate under relatively low and stable load conditions, leading to minimal temperature rise in both types of bearings, low lubricant oil temperatures within the bearing housing, and excellent lubrication and cooling performance—thus establishing a positive feedback loop that ensures reliable bearing operation and extended bearing life. The reduced axial and radial loads also decrease overall vibration and noise levels of the unit, further enhancing its operational reliability. Additionally, the lower bearing loads translate into reduced power consumption by the bearings themselves, thereby improving the overall efficiency of the unit and lowering the operating costs of the pump station.
Through measures such as the rational design of the rotor, precise calculation and verification of critical speeds, and the application of G2.5 dynamic balancing standards to rotating components, the rotor operates with stable performance and low vibration, thereby ensuring the pump’s reliability and operational stability. Meanwhile, by conducting vibration modal analysis and carefully staggering the vibration frequencies of the pump casing, rotor, and base, we can guarantee the pump’s operational stability and significantly reduce noise during operation, thus meeting the pump’s environmental protection requirements.
Ø Key Features
The overall structure adopts the API610 BB1 type, which is an axial horizontal split, base-mounted single-stage double-suction pump. Its main features are:
A. With a horizontal split design, maintenance only requires opening the pump cover—there’s no need to loosen the pump’s inlet and outlet pipelines.
B. No shaft sleeve; the impeller is secured to the shaft using a retaining ring.
C. Modular mechanical seal, easy to disassemble and assemble;
D. Equipped with wear-resistant rings on the impeller and pump casing to extend the service life of both the impeller and the pump casing.
E. The coupling length is sufficient to allow replacement of the mechanical seal and bearings without moving the pump and motor.
F. High cavitation resistance.
SY-type single-stage double-suction mid-open pump structural type
The “SY” type oil transfer pump with a split-case design is installed horizontally. Both the suction port and the discharge port are located below the pump shaft’s centerline. The pump casing of this split-case pump features a horizontal split, allowing maintenance without the need to disconnect the inlet and outlet pipelines. The shaft seal is a soft packing seal; it can also be replaced with a mechanical seal.
Rotation direction: When viewed from the motor end toward the pump, the “SY” type pump rotates counterclockwise, with the suction port on the left and the discharge port on the right. When the pump rotates clockwise, the suction port is on the right and the discharge port is on the left.
Material of main components: All flow-path components of the pump are made of cast iron.
Pump complete set scope: The complete set includes split-case pumps, motors, baseplates, couplings, and inlet/outlet short pipes, among other components.
Product Parameters
Parameter Range of SY-Type Oil-Transfer Double-Suction Split-Casing Centrifugal Pump
Flow rate (Q): 88 ~ 8000 m³/h
Head (H): 12–1500 m
Rotational speed (N): 2980 rpm and 1480 rpm
Working pressure (P): 0~20 MPa
Operating temperature (T): -45℃ ~ 80℃
Performance Parameter Table for SY-Type Oil-Transfer Double-Suction Split-Casing Centrifugal Pump
| Model | Traffic | Head height | Efficiency | Shaft power | Rotational speed | Motor power (kw) |
| (m³/h) | (m) | (%) | (kw) | (rpm) | ||
| 150SY50 | 160 | 50 | 79 | 27.6 | 2950 | 37 |
| 150SY78 | 160 | 78 | 74 | 46 | 2950 | 55 |
| 150SY100 | 160 | 100 | 73 | 59.7 | 2950 | 75 |
| 200SY42 | 280 | 42 | 85 | 37.7 | 2950 | 55 |
| 200SY63 | 280 | 63 | 81 | 59.3 | 2950 | 75 |
| 200SY95 | 280 | 95 | 77 | 94.1 | 2950 | 110 |
| 250SY14 | 485 | 14 | 85 | 21.8 | 1480 | 30 |
| 250SY24 | 485 | 24 | 86 | 36.9 | 1480 | 45 |
| 250SY39 | 485 | 39 | 83 | 62.1 | 1480 | 75 |
| 250SY65 | 485 | 65 | 79 | 108.7 | 1480 | 132 |
| 300SY12 | 790 | 12 | 83 | 31.1 | 1480 | 37 |
| 300SY19 | 790 | 19 | 84.5 | 48.4 | 1480 | 75 |
| 300SY32 | 790 | 32 | 87 | 79.2 | 1480 | 110 |
| 300SY58 | 790 | 58 | 84 | 148.6 | 1480 | 185 |
| 300SY90 | 790 | 90 | 77 | 251.6 | 1480 | 315 |
| 350SY16 | 1260 | 16 | 86 | 63.9 | 1480 | 75 |
| 350SY26 | 1260 | 26 | 88 | 101.4 | 1480 | 132 |
| 350SY44 | 1260 | 44 | 85 | 177.7 | 1480 | 220 |
| 350SY75 | 1260 | 75 | 85 | 303 | 1480 | 400 |
| 350SY125 | 1260 | 125 | 79 | 543.3 | 1480 | 710 |
| 400SY40 | 1080 | 40 | 84 | 140.1 | 970 | 185 |
| 400SY90 | 1620 | 90 | 86 | 462 | 1480 | 560 |
| 500SY13 | 2020 | 13 | 83 | 86.2 | 970 | 110 |
| 500SY22 | 2020 | 22 | 84 | 144.2 | 970 | 250 |
| 500SY35 | 2020 | 35 | 88 | 218.9 | 970 | 280 |
| 500SY59 | 2020 | 59 | 83 | 391.3 | 970 | 500 |
| 500SY98 | 2020 | 98 | 80 | 674.3 | 970 | 900 |
| 600SY22 | 3170 | 22 | 88 | 216 | 970 | 280 |
| 600SY32 | 3170 | 32 | 88 | 314.1 | 970 | 400 |
| 600SY47 | 3170 | 47 | 88 | 461.4 | 970 | 560 |
| 600SY75 | 3170 | 75 | 85 | 762.2 | 970 | 900 |
| 600SY100 | 3170 | 100 | 85 | 1016.3 | 970 | 1250 |
| 800SY22 | 5500 | 22 | 89 | 370.5 | 730 | 450 |
| 800SY32 | 5500 | 32 | 89 | 538.9 | 730 | 710 |
| 800SY47 | 5500 | 47 | 90 | 782.7 | 730 | 1000 |
| 800SY61 | 4400 | 49 | 87 | 675.3 | 585 | 900 |
| 800SY76 | 5500 | 76 | 88 | 1294.4 | 730 | 1600 |
| 900SY23 | 8280 | 23 | 86 | 603.4 | 730 | 710 |
| 1000SY36 | 9900 | 36 | 88 | 1103.6 | 495 | 1400 |
| 1200SY22 | 9600 | 22 | 87 | 661.5 | 500 | 800 |
| 1200SY32 | 10800 | 32 | 87 | 1082.5 | 600 | 1400 |
| 1200SY39 | 9000 | 39 | 88 | 1086.9 | 500 | 1400 |
| 1200SY56 | 10800 | 56 | 88 | 1872.8 | 600 | 2240 |
| 1200SY72 | 10224 | 72 | 89 | 2253.9 | 746 | 2800 |
Friendly reminder: Click on the specific model series above to view more detailed specifications and performance curves, among other information.
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.
Square meters of land area
100% factory pass rate
Square meters of land area
100% factory pass rate
Q
What is your typical delivery time?
A
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 。
Q
Do you have centrifugal pumps in stock?
A
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.
Q
What information should I provide when requesting a quote?
A
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.
Q
What products do you mainly produce?
A
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.
Q
Why is it so slow to get a price quote?
A
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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