Having 26 series -312 varieties - over 1000 pump models

Focused on water pump research and development manufacturing for 36 years

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QY-type oil-filled submersible electric pump



classification:

Submersible pump

keyword:

Horizontal Single-Stage Fire Pump

Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

The QY-type oil-immersed submersible pump is a portable shallow-water irrigation and drainage device that integrates the pump and motor into one unit. Its key feature is that the motor is completely filled with mechanical oil, which significantly improves the operating conditions of the mechanical seal and makes it much more difficult for external water to enter the motor interior. The oil efficiently conducts heat away from the motor interior, providing excellent cooling performance and substantially reducing the motor's temperature rise. As a result, the submersible pump’s overload capacity is greatly enhanced. Moreover, in oil-immersed submersible pumps, the bearings operate immersed in oil, ensuring reliable lubrication and cooling. Consequently, the bearing life of these pumps is considerably longer than that of other types of submersible pumps.
 Oil-immersed submersible pump
 
The QY-type oil-immersed submersible pump features a compact structure, is lightweight and easy to move, boasts excellent bearing lubrication conditions, operates with low noise, and has a long service life. Its integral mechanical seal ensures durability, reliability, and safety. The QY submersible pump is widely used by farmers as well as industrial and mining enterprises as a power-driven irrigation and drainage device. It is suitable for various applications including agricultural irrigation and drainage, landscape sprinkler irrigation, fountain water supply, well water lifting, water tower delivery, municipal construction, and water supply and drainage in industrial and mining enterprises.

Product Parameters

QY Model Oil-Filled Submersible Electric Pump Model Parameters

       Model: QY40-38-7.5

       Flow rate: 40 m³/h

       Head: 35 m

       Rotational speed: 2900 rpm

       Rated power: 75 kW

       Suction port diameter: 80 mm

       Discharge diameter: 80 mm

 

Operating Conditions and Features of QY Oil-Immersed Submersible Electric Pumps

       The QY-type submersible pump, often referred to as a submersible electric pump, consists of three main components: the pump, the seal, and the motor. The pump is located at the upper part of the electric pump and features either a centrifugal or axial-flow design. The motor is situated at the lower part of the electric pump and is an oil-filled three-phase asynchronous motor. An integrated mechanical seal housed internally seals the interface between the pump and the motor. At each fixed sealing flange, an "O"-ring made of oil-resistant rubber is used as a static seal.

       Applicable conditions:

       1. The temperature of the conveyed medium is less than +40℃;

       2. The pH of the medium should be between 6.5 and 8.5.

       3. The content of solid impurities in water shall not exceed 0.1%, and the particle size shall be no greater than 0.2 mm.

       4. The electric pump should be operated within an appropriate range near its rated head. The operating head must not fall below 85% of the rated head; otherwise, the thermal protector is likely to activate, causing the electric pump to stop running and affecting normal operation.

       5. The power supply frequency is 50 Hz, and the voltage range should be between 342 V and 420 V. Moreover, the three-phase voltages must be balanced. If the equipment is located far from the power source, the power supply cable needs to be extended; in this case, the cross-sectional area of the power cable must be larger than that of the submersible pump’s cable (i.e., at least 1.5 mm²) to ensure that the voltage remains stable within the range of 342 V to 420 V.

       6. Three-phase electric pumps must not be operated without a phase; please install overcurrent and leakage protection devices.

       Product features:

       Integrated pump and electric motor, compact structure;
       No water diversion required; easy to use.
       Double-end sealing and electrical protection;
       Well-designed and with excellent performance;
       Durable and safe and reliable.

 

Friendly reminder: For the performance parameters of QY-type oil-filled submersible pumps, please click → [Pump Selection] page to view.

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

Image Name

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

Could you help me with the selection?

A

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.

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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