EF Series Submersible Sewage PumpSupplier in Bangladesh
Non-clog submersible sewage pumps from 0.5 HP to 15 HP for STP, ETP, factory drainage, fishery and dairy sumps, supplied with installation and after-sales support by Techno Bangla Creation.
What Is a Submersible Sewage Pump?
A submersible sewage pump is a pump and sealed motor that work together under liquid, pushing sewage and wastewater containing solids out of a sump or tank. A non-clog impeller lets solids pass instead of blocking the pump. The EF series covers 0.5 to 15 HP for buildings, factories, farms and treatment plants.
The EF series suits sumps, STP inlets and drainage pits. For a pump that also aerates, see our submersible sewage pump and aerator. For dry-mounted duty, see the self-priming open impeller pump.
- Non-clog impeller with large clearance and low abrasive wear
- Motor overload protector and IP68 motor
- Double mechanical seal with a silicon carbide option
- Optional auto float switch for automatic operation
EF Series Specifications
- Power
- 0.5 HP ~ 15 HP (0.37 kW ~ 11 kW)
- Motor
- IP68, insulation class F
- Voltage
- 1 phase 110 / 220 ~ 240 V (1/2 HP ~ 2 HP). 3 phase 220 / 380 / 415 / 440 V (all models)
- Pole
- 2 pole only
- Frequency
- 50 Hz / 60 Hz
- Max. Head
- 34 m (50 Hz) / 40 m (60 Hz)
- Max. Capacity
- 150 m³/h (2,500 LPM)
- Shaft Seal
- Double mechanical seal, silicon carbide (SiC) option
- Protection
- Motor overload protector. Optional auto float switch
- Application
- Buildings, STP, factory drainage, fishery, animal husbandry, dairy, piggery, fecal sewage tank, sumps
Maximum head and capacity do not occur at the same point. Check the pump curve of your exact model, and send us your flow and head for a recommendation.
What the EF Series Features Mean for You
Each feature solves a common sewage pump failure.
| Feature | What It Does |
|---|---|
| Non-clog impeller, large clearance | Lets solids and fibres pass through, so the pump blocks less and wears less |
| Motor overload protector | Switches the motor off on voltage drop, a plugged impeller or other unusual conditions, which helps prevent burnout |
| Double mechanical seal | Keeps sewage out of the motor. An SiC seal option gives harder seal faces |
| IP68, class F motor | IP68 means the motor can run submerged. Class F insulation is rated to about 155 °C |
| Optional auto float switch | Starts and stops the pump with the water level, so no one must watch the sump |
| 0.37 ~ 11 kW range | One series from small sumps to larger lift duties up to 150 m³/h |
Non-Clog vs Vortex vs Grinder Sewage Pumps
The impeller decides how a sewage pump handles solids, rags and efficiency.
| Feature | Non-Clog (Semi-Open) | Vortex | Grinder |
|---|---|---|---|
| How it handles solids | Passes solids through wide vane passages | Recessed impeller, so solids rarely touch it | Cuts solids into a fine slurry |
| Efficiency | Higher | Lower, possibly about 30% below semi-open | Low |
| Rag and fibre risk | Moderate | Lowest clog risk | Cuts rags, so little clogging |
| Pipe size | Needs pipe that passes solids | Needs pipe that passes solids | Allows smaller pipe |
| Best fit | Domestic sewage and wastewater sumps with normal solids | Heavy ragging, sand or low flow, high head | Pressure sewers and rag-heavy sewage |
General guide from pump engineering sources. The EF series uses a non-clog impeller with large clearance. Ask us for the vane design and solids passage size of your model.
Where Are EF Series Sewage Pumps Used?
Anywhere wastewater with solids must be lifted from a sump, pit or tank.
| Where | Typical Duty | What to Check |
|---|---|---|
| Buildings, markets, community systems | Lifting sewage to an STP or sewer | Flow, lift height, duty and standby pump |
| Factory drainage and ETP | Collection and transfer sumps ahead of an ETP | Solids, temperature and chemicals in the effluent |
| Fishery, dairy, piggery, animal husbandry | Manure, wash water and fecal sewage sumps | Fibres and straw, which raise clog risk |
| Fecal sewage tanks | Emptying and transferring tank contents | Float switch settings and pipe size |
| Other sumps and treatment systems | General sewage and sump treatment duty | Pump curve against your head |
- STP
- ETP
- Building Sewage
- Factory Drainage
- Fishery
- Dairy Farm
- Piggery
- Fecal Tank
How to Size a Submersible Sewage Pump
Two numbers matter most: how much you pump and how high you lift it.
The Formula
- Shaft power (kW) = flow (m³/h) × total head (m) ÷ 367 ÷ pump efficiency
- Total head is the lift height plus pipe friction and fitting losses
- Sewage pumps often run at lower efficiency than clean-water pumps
- Pick a motor above the shaft power and check the pump curve
Worked Example
- Flow 30 m³/h at a total head of 15 m, with 50% pump efficiency
- 30 × 15 ÷ 367 = about 1.23 kW of hydraulic power
- 1.23 ÷ 0.5 = about 2.45 kW at the pump shaft
- A 3.7 kW (5 HP) motor leaves a margin. Confirm on the pump curve
Example only. Efficiency varies by model and duty point. Send us your flow, lift height and pipe length and our engineers will size the pump.
Sewage Pump Station Best Practice
A good pump in a poor sump still fails. These points protect pump life.
- Use a duty and a standby pump so one can be serviced without stopping the station
- Size the wet well so the pump does not start more often per hour than the maker allows
- Set the stop float above the pump inlet and keep the pump fully submerged during operation
- Keep wet well retention short, since long storage causes odor and septic sewage
- Use guide rails or a lifting chain so a pump can be removed without emptying the sump
- Design the discharge pipe for a cleansing velocity, often about 0.6 m/s or more, so solids do not settle
How to Choose a Sewage Pump Supplier in Bangladesh
Many pump listings in Bangladesh show only horsepower and price. Ask these questions before you buy.
- Flow and total head. Ask for the pump curve, not only HP.
- Solids and fibres. Describe the sewage. Rags, straw and sand change the right impeller.
- Seal and motor protection. Check the seal type, IP rating and what happens on overload.
- Voltage and phase. Match the pump to your supply, single or three phase.
- Control and support. Ask about float switches, panels, installation and spares.
Frequently Asked Questions
What is a submersible sewage pump?
A submersible sewage pump is a pump and sealed motor that work together under liquid, pushing sewage and wastewater containing solids out of a sump or tank. A non-clog impeller lets solids pass instead of blocking the pump. The EF series covers 0.5 to 15 HP for buildings, factories, farms and treatment plants.
What power, flow and head does the EF series cover?
The EF series covers 0.5 to 15 HP (0.37 to 11 kW). Maximum capacity is 150 m3/h (2,500 LPM), and maximum head is 34 m at 50 Hz or 40 m at 60 Hz. These maximums are not reached together, so check the pump curve of the exact model for your duty point.
What does a non-clog impeller mean?
A non-clog impeller has few vanes and wide passages, so solids and fibres pass through instead of lodging in the pump. The EF series has a non-clog impeller with large clearance and low abrasive wear. Vortex and grinder designs suit heavy rags. Tell us your sewage type and we will confirm the best choice.
How do I choose the right size sewage pump?
Find the flow in m3/h and the total head in metres, including lift and pipe losses. Shaft power in kW is flow times head divided by 367 and by pump efficiency. For 30 m3/h at 15 m and 50% efficiency, that is about 2.45 kW, so a 3.7 kW motor leaves margin. Confirm on the pump curve.
What voltage and phase options are available?
Single phase 110 or 220 to 240 V is available for 1/2 to 2 HP models. Three phase 220, 380, 415 or 440 V is available on all models. Motors are two pole and run at 50 or 60 Hz. Tell us your supply voltage and phase so we can quote the matching motor.
Does the pump have motor and seal protection?
Yes. The EF series has a motor overload protector that shuts the motor off on voltage drop, a plugged impeller or other unusual conditions, which helps prevent burnout. It uses a double mechanical seal with a silicon carbide option, and the motor is IP68 with class F insulation. An auto float switch is optional.
Where are EF series sewage pumps used?
They are used in building wastewater systems, sewage treatment plants and community markets, factory and industrial drainage, and fishery, animal husbandry, dairy and piggery sumps. They also empty fecal sewage tanks and serve other sump or treatment systems. Share your site details and we will recommend a model.
How can I get a quotation for an EF series sewage pump?
Send your required flow, total head, supply voltage and phase, and a short description of the sewage to our engineers by phone or email. We reply with a free quotation for your STP, ETP, WTP or water treatment equipment, and we can also advise on float switches, control panels and installation.
