Product Application
Adopting a multi-stage impeller structure, this series of electric pumps features high head and wide application range. It is an indispensable water delivery equipment for farmland irrigation and drainage, sprinkler irrigation, garden watering, well water lifting, water tower water supply, aquaculture water supply and drainage, and other scenarios.
Operating Conditions
- Liquid medium temperature ≤ +40°C
- pH value of the medium: 6.5 ~ 8.5
- Volume ratio of solid impurities ≤0.1%, particle size ≤0.2mm
- Power frequency: 50Hz; Voltage: single-phase AC 220V, three-phase AC 380V; allowable voltage fluctuation: ±10% of rated value
- Maximum submergence depth: ≤5m
The oil-filled submersible electric pump (hereinafter referred to as the pump) consists of three components: pump body, electric motor and sealing assembly.
The pump section is located at the upper part of the unit, adopting multi-stage centrifugal impellers and radial diffuser vane structure.
The motor is mounted at the lower part of the pump, available as single-phase or three-phase asynchronous motor.
Mechanical seal is installed between pump and motor. O-ring rubber gaskets are applied for static sealing at all fixed spigot joints.
The power cable adopts epoxy-sealed cable plug design for easy replacement.
| No. | Model | Rated Flow (m³/h) | Rated Head (m) | Rated Power (kW) | Rated Voltage (V) | Rated Current (A) | Synchronous Speed (r/min) | Matched Inner Dia. (mm) | Head Range (m) | Overall Dimension (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | QDY3-30/2-0.75K2 | 3 | 30 | 0.75 | 220 | 6.9 | 3000 | 25 | 5–33 | 185×630 |
| 2 | QDY3-45/3-1.1K2 | 3 | 45 | 1.1 | 220 | 9.0 | 3000 | 25 | 5–47 | 185×680 |
| 3 | QDY6-32/3-1.1K2 | 6 | 32 | 1.1 | 220 | 9.0 | 3000 | 38 | 10–45 | 185×650 |
| 4 | QDY15-21/3-1.5K2 | 15 | 21 | 1.5 | 220 | 11.8 | 3000 | 64 | 10–36 | 185×685 |
| 5 | QDY3-82/5-1.8K2 | 3 | 82 | 1.8 | 220 | 13.9 | 3000 | 25 | 30–88 | 185×790 |
| 6 | QDY12-36/4-1.8K2 | 12 | 36 | 1.8 | 220 | 13.9 | 3000 | 51 | 5–50 | 185×760 |
| 7 | QDY3-96/6-2.2K2 | 3 | 96 | 2.2 | 220 | 16.9 | 3000 | 25 | 30–104 | 185×835 |
| 8 | QDY15-35/4-2.2K2 | 15 | 35 | 2.2 | 220 | 16.9 | 3000 | 64 | 5–50 | 185×810 |
| 9 | QY3-30/2-0.75K2 | 3 | 30 | 0.75 | 380 | 2.1 | 3000 | 25 | 5–33 | 185×575 |
| 10 | QY3-45/3-1.1K2 | 3 | 45 | 1.1 | 380 | 2.9 | 3000 | 25 | 5–47 | 185×630 |
| 11 | QY6-32/3-1.1K2 | 6 | 32 | 1.1 | 380 | 2.9 | 3000 | 38 | 10–47 | 185×600 |
| 12 | QY3-55/4-1.5K2 | 3 | 55 | 1.5 | 380 | 3.8 | 3000 | 25 | 5–65 | 185×665 |
| 13 | QY15-21/3-1.5K2 | 15 | 21 | 1.5 | 380 | 3.8 | 3000 | 64 | 10–36 | 185×625 |
| 14 | QY3-82/5-1.8K2 | 3 | 82 | 1.8 | 380 | 4.5 | 3000 | 25 | 30–88 | 185×720 |
| 15 | QY12-36/4-1.8K2 | 12 | 36 | 1.8 | 380 | 4.5 | 3000 | 51 | 5–50 | 185×690 |
| 16 | QY3-96/6-2.2K2 | 3 | 96 | 2.2 | 380 | 5.4 | 3000 | 25 | 30–104 | 185×770 |
| 17 | QY15-35/4-2.2K2 | 15 | 35 | 2.2 | 380 | 5.4 | 3000 | 64 | 5–50 | 185×750 |
| 18 | QY3-112/7-3K2 | 3 | 112 | 3 | 380 | 7.2 | 3000 | 25 | 30–120 | 185×820 |
| 19 | QY20-36/2-3K1 | 20 | 36 | 3 | 380 | 7.8 | 3000 | 64 | 30–40 | 250×685 |
I. Main Features
The oil-filled submersible pump is an integrated submersible water supply device with an oil-filled motor. Compact and lightweight, it combines pump and motor into one unit, requiring no dedicated pump house. It starts working once submerged in water.
- Reliable sealing and excellent waterproof performance The motor chamber is filled with special insulating cooling oil, which cools the motor and reduces temperature rise while blocking moisture to prevent water ingress and electric leakage. Equipped with precision mechanical seals and multi-layer rubber sealing components, it delivers good water and sand resistance, resisting water penetration during long-term underwater operation.
- Stable operation and low noise Operating underwater, the pump produces little airborne noise with low vibration. The oil provides good lubrication and heat dissipation for continuous long-running operation and prevents overheating, offering better durability than ordinary dry-type submersible pumps.
- High head and stable water delivery Designed with multi-stage impellers, it generates high outlet pressure and large head with steady water flow. It works well under variable water levels and maintains a wide efficient operating range without fluctuating discharge.
- Corrosion resistance and long service life The pump body is made of high-quality metal. Matched with oil-resistant and anti-aging sealing parts, it can handle clean water with minor fine impurities. It resists rust, aging and abrasion, suitable for long-term outdoor, field and deep well applications.
- Simple installation and easy operation No complicated piping or fixing structures are required. It can be vertically lowered directly into wells, tanks or rivers. It is portable and easy to maintain for both temporary and permanent water supply projects.
II. Application Scenarios
- Agricultural irrigation Field watering, vegetable plot irrigation, orchard water supply and large farm drainage & irrigation, ideal for field water intake without fixed pump houses.
- Deep well water intake & domestic water supply Rural deep well pumping, domestic water boosting, water tower filling and rooftop water replenishment with strong water pressure.
- Aquaculture Water exchange, water replenishment and water circulation for fish and shrimp ponds. It adapts well to water bodies and supports continuous underwater running.
- Construction and mining water supply & drainage Pumping accumulated water at construction sites, foundation pit drainage, shallow water intake and drainage in mines, featuring strong continuous operation capacity.
- Landscape and garden water supply Park fountains, green irrigation and river water replenishment with quiet operation.
- Light industry fluid transfer Suitable for clean water, low-concentration syrup and non-corrosive clean water media, for conventional water delivery in food and light industry.
III. Operating Precautions
- No dry running allowed The pump must be fully submerged during operation. Never run it without water or expose it above the water surface; otherwise, seals and impellers will wear rapidly, causing water leakage and motor burnout.
- Limit impurities in water Only clean water or water with trace fine particles is permitted. Do not pump water with high sand content, fibrous debris or corrosive sewage, to avoid clogging and abrasion of stator and impellers.
- Control water temperature and pH value Water temperature shall not exceed 35℃–40℃. The water should be neutral. Do not pump strong acidic or alkaline liquids.
- Stable power supply Operating voltage must stay within ±10% of the rated value. Low voltage leads to weak output and overheating; excessive voltage may burn out the motor.
- Avoid long-term overload operation Prolonged overload beyond rated head or flow will accelerate motor aging and shorten service life.
IV. Routine Maintenance
- Inspect the power cable and plug for damage before each use to eliminate electric leakage risks.
- Regularly clean sediment and debris on the pump housing to keep the inlet unblocked. Blockage will reduce water output and impair heat dissipation.
- After long operation, check whether mechanical seals and oil seals are aged or leaking. Replace sealing parts promptly if water seepage or turbid oil occurs.
- If the pump will not be used for a long period, lift it out, clean thoroughly, dry and store in a dry and ventilated place. Do not leave it immersed indefinitely, which accelerates aging.
- Periodically test the motor insulation. Replace oil for aging units in time to guarantee safety during submersible operation.