SEKO Dosing Pump Supplier in Bangladesh
Italian SEKO solenoid and motor-driven diaphragm metering pumps for precise, repeatable chemical dosing in ETP, WTP and STP plants, supplied with installation and after-sales support by Techno Bangla Creation.
What Is a SEKO Dosing Pump?
A SEKO dosing pump is a positive-displacement metering pump, designed and built in Italy, that injects a controlled, repeatable volume of liquid chemical into a process stream. Its job is accuracy rather than volume: industry sources report typical dosing accuracy of roughly ±1 to 3% of the set rate.
SEKO's range for this duty covers solenoid-driven and motor-driven diaphragm pumps, which use a flexing diaphragm and suction/discharge check valves to meter chemical. This differs from a peristaltic (hose) pump, which squeezes a flexible tube with rollers and has no valves to clog. See the comparison below for which fits your chemical.
- Solenoid and motor-driven diaphragm designs covering 0 to 1200 L/h
- Wetted parts in PVC, PP, PVDF, PTFE, SS-304 or SS-316 to match the chemical
- Suited to ETP, WTP, STP, boiler and cooling tower dosing
- Installation and after-sales support in Bangladesh
SEKO Dosing Pump Specifications
- Solenoid-Driven Type
- Capacity 0 ~ 60 L/h · Max pressure 2.0 MPa (about 20 bar)
- Motor-Driven Diaphragm Type
- Capacity 5.5 ~ 1200 L/h · Max pressure 1.0 MPa (about 10 bar)
- Stroke Length
- 2 mm, 4 mm or 6 mm (motor-driven diaphragm type)
- Motor
- 0.18 ~ 0.55 kW, IP55 protection
- Diaphragm Diameter
- 64 ~ 165 mm (motor-driven diaphragm type)
- Wetted Parts
- PVC, PP, PVDF, PTFE, SS-304 or SS-316
- Application
- ETP, WTP, STP, Boiler Water, Cooling Tower, Chemical, Textile, Pharmaceutical, Food & Beverage
- Brand
- SEKO
- Origin
- Italy
Exact capacity, pressure, stroke length and wetted-parts material depend on the model and pump head you select. Send us the chemical, its concentration and your required dosing rate, and our engineers will confirm the right SEKO model.
Diaphragm/Solenoid Dosing Pump vs Peristaltic Pump
Both are positive-displacement dosing technologies. They handle different chemicals well, so each fits different duties.
| Feature | Diaphragm / Solenoid (SEKO) | Peristaltic (Hose) Pump |
|---|---|---|
| Working principle | A flexing diaphragm with suction and discharge check valves meters each stroke | Rollers squeeze a flexible tube; no valves in the flow path |
| Particulate or slurry chemicals | Check valves can foul or clog, as reported by pump manufacturers | Reported to handle particulate-laden fluids well, since there are no valves to block |
| Off-gassing chemicals (e.g. sodium hypochlorite) | Can lose prime or vapour-lock, per industry sources | Generally more tolerant, since gas is simply pumped through the tube |
| Pressure capability | Higher; SEKO's solenoid range reaches roughly 20 bar | Lower, though some modern designs reach about 100 psi (roughly 7 bar) |
| Dosing accuracy | Reported around ±1 to 2% on motor-driven diaphragm designs | Comparable when new, though tube wear can affect repeatability over time |
| Routine maintenance | Periodic check-valve and diaphragm inspection | Scheduled tube replacement |
| Typical upfront cost | Often lower for a comparable duty point, per industry comparisons | Often higher for the same duty point |
| Best fit | Clear or lightly corrosive chemicals needing higher pressure and fine control | Particulate-laden or gas-forming chemicals at lower pressure |
Values are typical figures reported in pump-industry comparisons. Always confirm against the datasheet of the exact model before you order.
How a SEKO Dosing Pump Works
- Suction StrokeThe diaphragm retracts, opening the inlet check valve and drawing a measured volume of chemical into the pump head.
- Diaphragm ActuationA solenoid coil, or a motor-driven cam on larger models, flexes the diaphragm to change the chamber volume.
- Discharge StrokeThe diaphragm moves forward, closing the inlet valve and opening the outlet valve to push chemical out.
- Rate Set by Stroke and SpeedAdjusting stroke length and stroke frequency changes the dosed volume per hour.
- Chemical Reaches the ProcessThe discharge line, often with an injection quill or back-pressure valve, carries the chemical into the tank or pipe, sometimes paired with an online analyzer for automatic pH or chlorine control.
Key Benefits
Over- or under-dosing wastes chemical or risks non-compliant discharge, so the pump you choose matters.
- High dosing accuracy, reported around ±1 to 2% of the set rate on motor-driven diaphragm designs
- Wide choice of wetted-parts material (PVC, PP, PVDF, PTFE, SS-304, SS-316) to match corrosive or hot chemicals
- Capacity range from 0 to 1200 L/h covers small dosing points up to large plant chemical feed
- Adjustable stroke length and speed give turndown without oversizing the pump
- Positive-displacement design suited to continuous, unattended dosing
- Local engineering, installation and after-sales support from Techno Bangla
Which Dosing Pump Fits Your Chemical?
Choose a SEKO Diaphragm/Solenoid Pump When
- The chemical is clear or only lightly corrosive
- Discharge pressure is relatively high, up to about 20 bar
- You need a wide choice of wetted-parts material for chemical compatibility
- Continuous, unattended dosing is required
- Fine control of dosing rate through stroke length and speed matters
Choose a Peristaltic Pump When
- The chemical contains particulates or is a slurry
- You are dosing an off-gassing chemical such as sodium hypochlorite
- Operating pressure is low and simple tube maintenance is preferred
- Chemical containment matters, since only the tube touches the chemical
- Budget is the main constraint. Ask about our EMEC dosing pump range for a lower-cost option too.
Where SEKO Dosing Pumps Are Used
Any process that needs accurate, repeatable chemical dosing.
- ETP Chemical Dosing
- WTP Chemical Dosing
- Boiler Water Treatment
- Cooling Tower Water Treatment
- Textile & Dyeing
- Pharmaceutical
- Food & Beverage
How to Choose the Right Dosing Pump
Share these details with our engineers and we will recommend a suitable SEKO model and pump head.
- Chemical and concentration. Confirm the wetted-parts material (PVC, PP, PVDF, PTFE, SS-304 or SS-316) against the chemical's compatibility before ordering.
- Required dosing rate and turndown. State your minimum and maximum dose so stroke length and speed can be set inside the pump's working range.
- Discharge pressure and back-pressure valve. Confirm the pressure at the injection point. Industry guidance recommends a relief or back-pressure valve set at least 10% above the maximum operating pressure.
- Off-gassing chemicals. Sodium hypochlorite and similar chemicals are more prone to vapour lock in a diaphragm pump, so flag this early so the right pump head is selected.
- Bangladesh discharge standard. Composite textile ETPs commonly target a discharge pH of about 6.5 to 9, so accurate acid or alkali dosing is central to staying within that range.
Why Dosing Accuracy Matters in Bangladesh ETPs
A study of composite textile ETPs in Bangladesh found that poor management, including chemical dosing, was among the leading causes of weak plant performance. An accurately sized dosing pump helps keep coagulant and pH-correction chemicals inside the intended range instead of over- or under-dosing.
One Bangladesh case study on textile effluent reported coagulant doses in the range of roughly 583 to 984 mg/L for iron-based coagulant and about 330 to 606 mg/L for lime, figures that vary by effluent strength and should always be confirmed by jar testing at your own plant.
Installation and After-Sales Support
Techno Bangla Creation supplies treatment plant equipment together with installation, commissioning and after-sales support for factories, businesses and organizations across Bangladesh.
Our team is based in Mohakhali, Dhaka. Send your chemical, concentration and required dosing rate and our engineers will recommend a suitable SEKO model. See our chemical dosing pump range for the full EMEC and SEKO line-up.
Frequently Asked Questions
What is a SEKO dosing pump used for?
A SEKO dosing pump injects a controlled, repeatable volume of liquid chemical into a process stream, such as acid, alkali, coagulant or disinfectant. In ETP, WTP and STP plants it is typically used for pH correction, coagulant dosing and chemical feed to boiler or cooling tower water.
What is the difference between a solenoid and a motor-driven diaphragm dosing pump?
A solenoid-driven pump uses an electromagnetic coil to flex the diaphragm, is compact and suits smaller flows, up to about 60 L/h on SEKO's range. A motor-driven diaphragm pump uses a rotating cam, handles higher flow up to about 1200 L/h, and is generally chosen for larger or continuous dosing duties.
Diaphragm dosing pump vs peristaltic pump: which is better?
Neither is universally better. A diaphragm or solenoid pump generally suits clear or lightly corrosive chemicals at higher pressure with fine control. A peristaltic pump is often preferred for particulate-laden or gas-forming chemicals such as sodium hypochlorite, since it has no valves to clog. Match the pump to your chemical.
What capacity and pressure range do you supply?
Our SEKO solenoid-driven pumps cover 0 to 60 L/h at up to 2.0 MPa (about 20 bar), and motor-driven diaphragm pumps cover 5.5 to 1200 L/h at up to 1.0 MPa (about 10 bar). Exact limits depend on the model, so we confirm the right size from your chemical and dosing rate.
Is a SEKO dosing pump suitable for corrosive chemicals?
SEKO pump heads are available in PVC, PP, PVDF, PTFE, SS-304 or SS-316, so a suitable material can usually be matched to acids, alkalis and other corrosive chemicals. Chemical compatibility depends on concentration and temperature, so confirm the exact wetted-parts material on the datasheet before ordering.
How accurate is a chemical dosing pump?
Industry sources report typical dosing accuracy of roughly ±1 to 3% of the set rate for diaphragm and solenoid metering pumps, with some higher-end designs closer to ±0.5%. Real-world accuracy also depends on correct sizing, a clean suction line and routine maintenance of the check valves.
What maintenance does a dosing pump need?
Routine care mainly covers inspecting the suction and discharge check valves for fouling, checking the diaphragm for wear, and keeping the chemical tank topped up so the pump does not run dry. Off-gassing chemicals need extra attention, since trapped gas can cause the pump to lose its prime.
Is a SEKO dosing pump suitable for Bangladesh's textile ETPs?
Yes. SEKO dosing pumps are used for pH correction and coagulant dosing in industrial and textile ETPs, which in Bangladesh commonly need to hit a discharge pH of roughly 6.5 to 9. Our engineers size the pump to your effluent flow and chemical demand.
How can I get a quotation for a SEKO dosing pump?
Send your chemical, concentration, required dosing rate and discharge pressure to our engineers by phone or email. We reply with a free quotation for your ETP, WTP, STP or water treatment equipment.
