Description

A 3HP Doyin Submersible Borehole Pump is a powerful deep-well pump designed for farms, irrigation systems, commercial properties, institutions and large domestic water-supply projects. This model combines a 3HP motor, maximum head of 155 metres, maximum flow rate of 9.6m³/h and a 2-inch discharge outlet.

With a maximum delivery of 9,600 litres per hour, the pump is suitable where both good pressure and high water volume are required. It can be used for borehole extraction, filling storage tanks, livestock watering and supplying appropriately designed irrigation systems.

Comparable Doyin 3HP hybrid models currently sold in Kenya use a 2.2kW or 2200W motor, a 155m maximum head and 2-inch outlet. One current Kenya listing specifies 2200W, 240V AC/DC operation, stainless steel components, a brushless motor and an MPPT controller. Quick Specifications

Feature	Specification
Brand	Doyin / Dongyin
Product	3HP Submersible Borehole Pump
Motor Power	3HP / approximately 2.2kW
Maximum Head	155 metres
Maximum Flow	9.6m³/h
Maximum Water Output	9,600 litres/hour
Approx. Flow per Minute	160 litres/minute
Outlet	2 Inches
Pump Type	Multistage Borehole Pump
Installation	Submersible
Water Type	Clean/Fresh Water
Construction	Stainless Steel Components
Main Uses	Boreholes, Irrigation, Tank Filling and Farms

Doyin manufactures deep-well submersible pumps across a wide range of borehole diameters and specifically designs them for pumping water from wells, reservoirs, ponds and similar clean-water sources.

Powerful 3HP Motor

The pump uses an approximately 2.2kW motor, equal to about 3 horsepower.

This gives it considerably more pumping capacity than smaller 1HP and 1.5HP domestic borehole pumps.

It is suitable for:

• Deep boreholes
• Elevated water tanks
• Commercial farms
• Irrigation
• Schools
• Hotels
• Estates
• Livestock projects

A comparable 3HP Doyin solar/AC model currently sold in Kenya is rated at 2200W.

Maximum Head of 155 Metres

The pump has a maximum head of 155m.

This high pressure makes it suitable for pumping water from deeper boreholes or delivering water to tanks positioned well above the borehole.

Typical applications include:

• Deep water extraction
• Elevated tanks
• Long rising mains
• Hilly farms
• Pressurized irrigation

A current comparable Doyin 3HP pump confirms the same 155m maximum head.

What Does 155m Head Mean?

Head describes how much pressure the pump can generate in terms of an equivalent vertical column of water.

It does not mean the pump should automatically be installed at exactly 155m.

Pump selection should consider:

• Static water level
• Dynamic water level
• Tank elevation
• Pipe friction
• Pipe length
• Valves and bends
• Required final pressure

Doyin itself recommends considering borehole yield, static and dynamic water level, pump depth, pipe size, vertical elevation, horizontal distance and friction losses when choosing a submersible pump.

High Flow Rate of 9.6m³/h

Maximum flow is:

9.6m³ per hour

This equals:

9,600 litres per hour

or approximately:

160 litres per minute.

That makes this 3HP pump suitable for higher-demand water systems.

Maximum Water Output

Running Time	Maximum Theoretical Output
1 Hour	9,600 L
2 Hours	19,200 L
4 Hours	38,400 L
6 Hours	57,600 L
8 Hours	76,800 L
10 Hours	96,000 L

Actual flow will normally be lower when the pump is working against significant pressure.

Maximum Flow and Maximum Head Are Different Points

The pump should not be expected to provide 9.6m³/h while simultaneously pumping at its maximum 155m head.

As head rises, flow normally falls.

For accurate pump selection, check the manufacturer’s performance curve and choose the operating point that provides the flow you need at your actual Total Dynamic Head.

2-Inch Discharge Outlet

This pump has a 2-inch outlet.

A larger discharge connection is useful when handling a flow rate close to 9.6m³/h because it reduces unnecessary restriction compared with a very small pipe.

A comparable Doyin 3HP model currently sold in Kenya also specifies a 2-inch outlet.

The outlet can connect to a correctly sized:

• HDPE rising main
• UPVC pressure pipe
• Galvanized steel pipe
• Other approved borehole pipe

Always check the pipe’s pressure rating.

Multistage Borehole Pump Design

A pump capable of producing 155m head normally uses several pumping stages.

Each stage consists of an impeller and diffuser that adds pressure to the water before it reaches the next stage.

This provides:

• Higher pressure
• Stable water delivery
• Better deep-well performance
• Compact pump dimensions

Doyin produces multistage high-head submersible pumps for borehole and water-transfer applications.

Stainless Steel Construction

Comparable Doyin 3HP pumps use stainless steel in important water-contact components.

One current Kenyan 2200W model specifies:

• Stainless steel outlet
• Stainless steel oil cylinder
• Stainless steel connections
• Stainless steel impeller

Benefits include:

• Corrosion resistance
• Good mechanical strength
• Longer service life
• Suitability for borehole water

Brushless Motor on Hybrid Versions

If this 3HP Doyin pump is the AC/DC hybrid version, comparable models use a permanent-magnet DC brushless synchronous motor.

Brushless technology provides:

• High efficiency
• No carbon brushes to replace
• Lower mechanical wear
• Good solar compatibility
• Reliable long-term operation

For a conventional AC-only Doyin model, the motor specification may differ, so always use the rating plate on the exact pump being supplied.

AC/DC Hybrid Versions Available

Doyin 3HP pumps are also available in hybrid configurations that can operate from both:

• Solar DC
• Compatible AC power

A current 3HP Doyin hybrid pump sold in Kenya is specified for 240V DC / 240V AC operation.

This is useful where users want solar pumping during the day while retaining AC electricity as a backup source.

MPPT Controller on Hybrid Models

Comparable hybrid versions come with an MPPT controller.

MPPT helps the system use available solar power efficiently as sunlight changes during the day.

Depending on the controller, protection may include:

• Dry-run protection
• Overcurrent protection
• Overvoltage protection
• Undervoltage protection
• Motor protection
• Overload protection

Exact functions should be confirmed from the supplied controller.

Clean-Water Applications

Doyin specifies its deep-well submersible ranges for applications such as:

• Water supply from wells
• Reservoirs
• Domestic water
• Civil applications
• Industrial water
• Garden irrigation

 

The pump should not be used as a sewage, sludge or dirty-water pump.

Maximum Sand Content

Doyin’s deep-well pump documentation specifies a typical maximum sand content of approximately 0.25% on relevant deep-well series.

Excessive sand can cause:

• Impeller wear
• Reduced flow
• Increased motor load
• Blockage
• Shorter pump life

If a borehole produces a lot of sand, the borehole itself should be inspected before installing a new pump.

Water Temperature

Doyin specifies a maximum fluid temperature of approximately 35°C on relevant deep-well models.

This makes the pump suitable for ordinary clean borehole water rather than hot-water pumping.

Best Applications

Irrigation

The 9.6m³/h flow makes this pump useful for:

• Drip irrigation
• Sprinkler irrigation
• Greenhouses
• Orchards
• Vegetable farms
• Horticulture

The irrigation system should be designed around actual working pressure and flow.

Tank Filling

At maximum theoretical output, the pump can move large amounts of water quickly.

Tank Size	Theoretical Minimum Filling Time
5,000 L	About 31 minutes
10,000 L	About 1 hour 3 minutes
20,000 L	About 2 hours 5 minutes
50,000 L	About 5 hours 13 minutes

Actual filling time will be longer when pumping against high head.

Livestock Farms

Suitable for supplying water for:

• Dairy cattle
• Poultry
• Pigs
• Beef cattle
• Mixed farms

Schools and Institutions

The higher output can serve institutions requiring regular tank filling and dependable water supply.

Commercial Properties

Suitable for:

• Hotels
• Apartments
• Lodges
• Workshops
• Small industrial sites

3HP Doyin Pump vs 1.5HP Borehole Pump

Feature	1.5HP Pump	3HP Doyin Pump
Motor Power	Around 1.1kW	2.2kW
Maximum Head	Lower	155m
Maximum Flow	Lower	9.6m³/h
Outlet	Usually Smaller	2 Inches
Large Irrigation	Limited	Better
Tank Filling	Moderate	Faster

The 3HP pump is better suited to systems requiring both greater flow and higher pressure.

3HP Doyin vs 3HP Low-Flow High-Head Pump

Not every 3HP borehole pump delivers the same performance.

One 3HP pump may be designed for:

• Very high head
• Lower flow

while another may focus on:

• Higher flow
• Moderate head

This 155m / 9.6m³/h model provides a useful balance between both.

Always compare the complete pump curve, not horsepower alone.

Borehole Yield Must Match the Pump

Before installing a pump capable of 9.6m³/h, check how much water the borehole can sustainably produce.

Doyin advises using borehole yield as a key pump-selection factor and notes that required discharge should normally be matched to the borehole’s sustainable output.

If the borehole only produces 5m³/h, continuously trying to pump 9.6m³/h may lead to:

• Excessive drawdown
• Dry running
• Sand entry
• Pump damage

Total Dynamic Head

For correct sizing, calculate:

Dynamic water level + tank height + friction losses + fitting losses + required pressure

Doyin’s own technical guidance emphasizes both vertical and horizontal pipeline length when calculating delivery and friction losses.

For example:

• Dynamic water level: 85m
• Tank height: 15m
• Pipe and fitting losses: 12m

Approximate TDH:

112m

You would then need to check how much water the pump delivers at roughly 112m head.

Choosing the Correct Rising Main

Because the pump has a 2-inch outlet and a relatively high flow, correct pipe selection is important.

Consider:

• Internal diameter
• Pipe pressure rating
• Vertical depth
• Total length
• Flow velocity
• Friction losses

Using an undersized pipe can significantly reduce actual water delivery.

Installation Recommendations

For reliable operation:

• Obtain the borehole test report.
• Confirm dynamic water level.
• Install the pump vertically.
• Keep the pump above the borehole bottom.
• Ensure sufficient water covers the motor.
• Use a correctly rated rising main.
• Use suitable submersible electrical cable.
• Install appropriate non-return valves.
• Waterproof underwater cable joints.
• Provide suitable overload and dry-run protection.

Doyin states that its submersible motors are not designed for horizontal installation.

Do Not Suspend the Pump by the Electrical Cable

The electrical cable is not a lifting rope.

The pump should be properly supported using the approved rising main and installation method.

Improper suspension can damage:

• Cable insulation
• Motor connections
• Cable joints

Dry-Run Protection

Dry running occurs when the water level falls below the pump intake.

This can cause:

• Motor overheating
• Bearing damage
• Seal problems
• Premature pump failure

A suitable pump protection unit or compatible controller should be used where required.

Electrical Protection

A 3HP motor should have correctly sized:

• Circuit breaker
• Overload protection
• Cable
• Earthing
• Control system

Voltage drop is especially important where the borehole cable is long.

Have the electrical installation sized according to the pump’s rating plate and installation depth.

Maintenance

Submersible pumps generally need little daily maintenance, but system performance should still be monitored.

Check:

• Water flow
• Tank filling time
• Electrical current
• Voltage
• Control equipment
• Pipe leaks
• Borehole water level

A noticeable reduction in flow can be caused by:

• Falling water level
• Worn impellers
• Sand
• Blocked pipework
• Voltage problems
• Leaks

Advantages of the 3HP Doyin Pump

• Powerful 3HP motor
• Approximately 2.2kW power
• Maximum 155m head
• Maximum 9.6m³/h flow
• Delivers up to 9,600L/h
• 2-inch outlet
• High-pressure multistage design
• Good for irrigation
• Suitable for deep boreholes
• Stainless steel components
• Hybrid AC/DC versions available
• Established borehole-pump manufacturer

Doyin specializes in submersible pump manufacturing and produces deep-well pumps covering borehole diameters from 2 inches upward.

How to Choose the Right Doyin Pump

Before buying, confirm:

• Borehole yield
• Static water level
• Dynamic water level
• Total Dynamic Head
• Required flow
• Tank size
• Pipe diameter
• Borehole casing diameter
• Electricity supply
• Motor voltage
• Control system

Do not choose a pump using horsepower alone.

3HP Doyin Pump Price in Kenya

Prices depend on whether the pump is a standard AC model or a complete AC/DC solar hybrid package.

A current Kenyan listing for a 2200W 3HP Doyin Solar/AC pump with 155m head, 2-inch outlet and MPPT controller is priced at KSh 57,000. That comparable unit is listed at 10,000L/h, slightly above the 9.6m³/h specification of the model described here.

Configuration	Typical Kenya Price
3HP Doyin Borehole Pump	Depends on exact AC model
3HP Hybrid AC/DC Pump	Around KSh 50,000–60,000
Comparable Pump + MPPT Controller	Around KSh 57,000
Complete Solar Pumping System	Higher depending on panels and installation

Prices vary according to controller, motor type, cable, warranty and supplier.

Why Buy a 3HP Doyin Submersible Borehole Pump?

A 3HP Doyin Submersible Borehole Pump in Kenya is a strong choice for users who require more water than a standard domestic pump can provide but do not need a very large 5HP or 10HP system.

Its combination of a 155m maximum head, 9.6m³/h maximum flow and 2-inch outlet makes it suitable for deep boreholes, farm irrigation, livestock water supply and fast storage-tank filling.

Doyin also specializes in deep-well submersible pumps and manufactures pump ranges for domestic, agricultural, civil and industrial water-supply applications

For the best results, use the borehole test report and pump performance curve to confirm that the pump provides the required flow at your actual operating head.

Frequently Asked Questions

What is the power of the Doyin pump?

The pump is rated at 3HP, approximately 2.2kW or 2200W. A comparable current Doyin model uses the same power rating.

What is the maximum head?

The maximum head is 155 metres. Comparable 3HP Doyin models currently sold in Kenya confirm this specification.

What is the flow rate?

This model has a maximum flow of 9.6m³/h, equal to 9,600 litres per hour or about 160 litres per minute.

What is the outlet size?

The pump has a 2-inch discharge outlet.

Can it be used for irrigation?

Yes. Its high flow rate makes it suitable for drip, sprinkler and general farm irrigation where the borehole and irrigation system are correctly designed.

Is it suitable for deep boreholes?

Yes. The 155m maximum head gives it good pressure capability, but installation depth should be based on the dynamic water level and Total Dynamic Head rather than borehole depth alone.

Can it pump sandy water?

Doyin deep-well models are designed mainly for clean water. Relevant Doyin ranges specify a maximum sand content of around 0.25%.

What is the maximum water temperature?

Relevant Doyin deep-well pump specifications state approximately 35°C maximum fluid temperature.

Can it work with solar power?

If you choose the hybrid AC/DC version, yes. A current 3HP Doyin model supports 240V DC and 240V AC and comes with an MPPT controller. Does a hybrid version come with a controller?

Comparable 2200W Doyin AC/DC models are supplied with an MPPT controller.

Can it be installed horizontally?

Doyin states that its submersible motors are not suitable for horizontal installation.

What information do I need before buying?

You should know the borehole size, yield, static water level, dynamic water level, installation depth, delivery pipe size, tank elevation and pipeline length. Doyin lists these as key selection factors.

What is the price of a 3HP Doyin Pump in Kenya?

A comparable 2200W 3HP Doyin hybrid pump with 155m maximum head, 2-inch outlet and MPPT controller is currently listed at KSh 57,000. The exact price of the 9.6m³/h version depends on the motor type, controller package and supplier.