dosing-pump-applications
DOSECO CHEMICAL
DOSING PUMPS
SOUTH AFRICA
DOSECO Chemical Dosing Pumps South Africa launched the stepper-motor diaphragm pump range in response to demand for a more reliable, economical unit compared to the traditional solenoid option.
Voltage fluctuations that can burn out electronic cards are resolved by DOSECO’s unique power supply pack, which provides a 90 to 260 V AC operating range and a 24V DC option.
Positive priming, when one needs to turn down below 15%, the DOSECO SM dosing pump will not lose prime.
Dosing accuracy, even at 1% of the full design flow rate, accuracy and consistency is guaranteed.
Doseco Stepper-Motor Dosing Pumps are revolutionising the water treatment industry with affordable, accurate, reliable metering solutions.
Doseco Dosing Pump Model SMAX 1/7 (V) or (E)
The Doseco Dosing Pump Model SMAX 1/7 (V) is the basic Stepper motor, manual on/off pump unit. This is the unit selected when absolute minute dosages are required. The unit can accurately inject between 10 ml/hour at 7 Bar and up to the full-flow scale of 1000 ml/hour at 7 Bar. The unit is normally wired via a relay to either a PLC or another controller, or even coupled to the main water/effluent pump on/off contactor/relay. This does require setting based on the chemical’s calculated dose and the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260 V AC / X = PVC pump head, suction foot valve, and injection valve/(V) = Viton or (E) = EPDM seals.
The 1/7 is 1 liter per hour at 7 Bar, this pump will produce a flow of 2,2 liters per hour at 1 Bar.
Doseco Dosing Pump Model SMAY 1/7 (V) or (E)
The Doseco Dosing Pump Model SMAY 1/7 (V) is the basic Stepper motor, manual on/off pump unit. This is the unit selected when absolute minute dosages of concentrated acids and alkaline chemicals need to be injected. The unit can accurately deliver between 10 ml/hour at 7 Bar and up to the full-flow scale of 1000 ml/hour at 7 Bar. The unit is normally wired via a relay to either a PLC or another controller, or even coupled to the main water/effluent pump on/off contactor/relay. This does require setting based on the chemical’s dose and the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260 V AC / Y = PVDF pump head, suction foot valve, and injection valve/(V) = Viton or (E) = EPDM seals.
The 1/7 is 1 liter per hour at 7 Bar, this pump will produce a flow of 2,2 liters per hour at 1 Bar.
Doseco Dosing Pump Model SMAX 3/7 (V) or (E)
The Doseco Dosing Pump Model SMAX 3/7 (V) is the basic Stepper motor, manual on/off pump unit. This unit is selected where the water treatment chemical needs to be accurately metered into a pipe system pressure that is up to 6.5 Bar. The unit is usually activated when the main feed pump comes on, the dosing pump is then also switched on. This does require setting based on the dose of the chemical to the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260v AC / X = PVC pump head, suction foot valve, and injection valve, and (V) = Viton or (E) = EPDM seals.
The 3/7 is 3 liters per hour at 7 Bar; this pump will produce a flow of 5 liters per hour at 1 Bar.
Doseco Dosing Pump Model SMAY 3/7 (V) or (E)
The Doseco Dosing Pump Model SMAY 3/7 (V) is the basic Stepper motor, manual on/off pump unit. This unit is selected where a concentrated Acid or alkaline chemical needs to be accurately metered into a pipe system pressure that is up to 6.5 Bar. The unit is usually activated when the main feed pump comes on, the dosing pump is then also switched on. This does require setting based on the dose of the chemical to the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260v AC / Y = PVDF pump head, suction foot valve, and injection valve, and (V) = Viton or (E) = EPDM seals.
The 3/7 is 3 liters per hour at 7 Bar; this pump will produce a flow of 5 liters per hour at 1 Bar.
Doseco Dosing Pump Model SMAX 6/5 (V) or (E)
The Doseco Dosing Pump Model SMAX 6/5 (V) is a basic stepper-motor, manual on/off pump unit. Capable of accurately delivering just 60 ml per hour or up to 6 liters per hour at 5 Bar, this is the most common unit sold into water treatment applications. The dosing pump is usually controlled when the main feed pump comes on; it is also switched on. This does require setting based on the chemical’s dose and the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260v AC / X = PVC pump head, suction foot valve, and injection valve, and (V) = Viton or (E) = EPDM seals.
The 6/5 is 6 liters per hour at 5 Bar; this pump will produce a flow of 8 liters per hour at 1 Bar.
Doseco Dosing Pump Model SMAY 6/5 (V) or (E)
The Doseco Dosing Pump Model SMAY 6/5 (V) is a basic stepper-motor, manual on/off pump unit. Capable of accurately delivering concentrated acids or alkaline chemicals at just 60 ml per hour or up to 6 liters per hour at 5 Bar. This wide dosing range makes the 6/5 the most common unit sold into water treatment applications. The dosing pump is usually controlled when the main feed pump comes on; it is also switched on. This does require setting based on the chemical’s dose and the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260v AC / Y = PVDF pump head, suction foot valve, and injection valve, and (V) = Viton or (E) = EPDM seals.
The 6/5 is 6 liters per hour at 5 Bar; this pump will produce a flow of 8 liters per hour at 1 Bar.
Doseco Dosing Pump Model SMAX 9/3 (V) or (E)
The Doseco Dosing Pump Model SMAX 9/3 (V) is the basic Stepper motor, manual on/off pump unit. This is a high-volume, low-pressure unit for larger treatment chemical input, normally into the tank inlet, where the pressure is very low. If the pump is wired via a relay to the main water/effluent pump, then it is usually controlled when the main feed pump comes on; the dosing pump is also switched on. This does require setting based on the claculated chemical dose and the known water flow rate.
The model MOC options are as follows SM= Stepper Motor / A = AC 90 to 260v AC / X= PVC pump head, suction foot valve and injection valve and the (V) = Viton or (E) = EPDM seals.
The 9/3 is 9 liter per hour at 3 Bar. This pump will produce a maximum of 10.5 litre per hour at 1 Bar.
Doseco Dosing Pump Model SMAY 9/3 (V) or (E)
The Doseco Dosing Pump Model SMAY 9/3 (V) is the basic Stepper motor, manual on/off pump unit. This is a high-volume, low-pressure unit for larger treatment chemical input of concentrated acid or alkaline chemicals. This model is normally selected when dosing is directly into the tank inlet, where the pressure is very low. If the pump is wired via a relay to the main water/effluent pump, then it is usually controlled when the main feed pump comes on; the dosing pump is also switched on. This does require setting based on the calculated chemical dose and the known water flow rate.
The model MOC options are as follows: SM = Stepper Motor / A = AC 90 to 260 V AC / Y = PVDF pump head, suction foot valve, and injection valve/(V) = Viton or (E) = EPDM seals.
The 9/3 is 9 liter per hour at 3 Bar. This pump will produce a maximum of 10.5 litre per hour at 1 Bar.
ALL DOSECO SM Pumps available in 24V DC
With the rapid move toward Solar Power in South Africa, Doseco provides all the SM dosing pump models in direct 24v DC power configuration.
NO INVERTER REQUIRED
Many more models to be released soon.
The exciting Doseco brand of stepper-motor chemical dosing pumps for the water treatment industry
in South Africa, it is developing rapidly.
Soon to be released in June 2026.
- 10/10 model
- 100/1 model
- Pulse controlled series for direct coupling to water flow meters.
July 2026.
- SMART models with pH and Redox Probe activation.
- Complete cooling tower dosing systems for timer and probe activation.
- Complete systems for antiscalant injection, pH, disinfection and conductivity control.
Doseco Dosing Pump Selection Data
Doseco dosing pumps are really easy to identify in terms of the model capability and suitability for handling various chemicals.
It is good practice to know the codes so that one does not use the wrong pump construction materials approved for the chemical being metered.
We have linked a downloadable WhatsApp MOC QUICK COMPATIBILITY GUIDE BELOW to assist with product selection.
Once you have that, the rest of the instructions below will make more sense.
Get your quick reference
DOSECO- CHEMICAL COMPATIBILITY GUIDE
Doseco dosing pump voltage choices
AC 90 to 260 Volts
DOSECO dosing pumps are built for unstable voltage events
DC 24 Volts
DOSECO dosing pumps are ready for Direct Current Solar application
DOSECO Dosing Pump Materials of Construction KEY
PVC = X
PVDF = Y
VITON = (V)
EPDM = (E)
Doseco dosing pump model options
The DOSECO Pump Models have the flow and pressure rating in their Model designation.
The respective minimum flow rate at the maximum pressure.
However these units will generate a far higher flow at lower pressures.
FOR EXAMPLE
Model 1/7 (1 liter per hour flow and 7 Bar max pressure)
Model 3/7 (3 liter per hour flow at 7 Bar maximum pressure)
Model 6/5 (6 liter per hour flow at 5 Bar maximum pressure)
Model 9/3 ( 9 liter per hour flow at 3 Bar maximum pressure)
Model 10/10 ( 10 Liter per hour flow at 10 Bar maximum pressure)
Model 100/1 (100 liter per hour flow at 1 Bar Maximum pressure)
DOSECO Dosing Pump Model Selection Examples
DOSECO Dosing Pump Model SMDY 6/5 (V)
SM = Stepper Motor
DC = DC POWER SUPPLY
Y = PVDF PUMP HEAD/INJECTION VALVE AND SUCTION FOOT VALVE
6/5 =6 litre per hour minimum flow at 5 Bar maximum pressure
(V) = VITON SEALS
DOSECO Dosing Pump Model SMAX 6/5 (E)
SM = Stepper Motor
A = AC POWER SUPPLY
X = PVC PUMP HEAD/INJECTION VALVE AND SUCTION FOOT VALVE
6/5 =6 litre per hour minimum flow at 5 Bar maximum pressure
(E) = EPDM SEALS
How To Select The Right Dosing Pump Example
What is the duty the dosing pump needs to satisfy?
EXAMPLE:- Borehole water is pH5.2 and we need to elevate to 7 or 7.4 – Duty is pH control
What is the chemical being dosed?
EXAMPLE:- Sodium Hydroxide 12%
What is the estimated maximum volume the dosing pump must inject into the fluid stream? (Liter/Hour)
EXAMPLE:- The water treatment contractor estimates a maximum of 1 liter per hour
What is the minimum dosage? (Liter per hour)
EXAMPLE:- 200 ml per hour
What pressure will the dosing pump be expected to meter fluid into? (BAR)
EXAMPLE:- The water storage tank is directly above the borehole, less than 1 bar pressure in the line.
What is the voltage? (AC or DC)
EXAMPLE:- Normal house mains – AC 220v
The Correct and most economical DOSECO pump model for the above inquiry would be either the SMAX 3/7 (E) or the most popular SMAX 6/5 (E).
MOC Reason:- The (SM) Stepper Motor Pump is an (A) AC 220v unit with a (X) PVC pump head and the (E) EPDM seals, which are all recommended for 12.5% Caustic (Sodium Hydroxide)
FLOW/PRESSURE SELECTION Reason: The 3/7 pump will operate at 30% of the stepper frequency, so it will run whisper-quiet. Also, the minimum flow setting could be around 200ml per hour. The 3/7 will operate efficiently at just 30ml per hour, so at a setting of just 6%, this pump will accurately dose the 200ml per hour. However, if the contractor has miscalculated, there is enough room to set the pump higher to 33%. The 3/7 will produce much higher flow at only 1 Bar, so the contractor will have room to set dosage correctly.
The 6/5 is the most-purchased unit by water treatment professionals because it offers a broad range of flow/pressure options. (Ideal for a one model fits most applications point of view) At 1 Bar, the 6/5 will produce 8 liters per hour at 100% and just 80 ml per hour at 1%.
The 6/5 Stepper motor design will accurately dose the 200ml at a setting of just 3%, and if the setting needs to be 1 liter per hour, it will set to 12.5%; one will not even hear the unit operating.
DOSECO Compact Dosing Pump Model SMAY 6/5 (V) LC
The DOSECO Compact Digital Dosing Pump is capable of exceptional accuracy in the range of 60 ml to 6 liters per hour at 5 Bar line pressure
This configuration is typical of a concentrated Sodium Hypochlorite dosing application. The chemical is being dosed at a rate of anything between 500 ml and 3 liters per hour. The water line runs at 3 or 4 Bar pressure.
This unit is equipped with a switch-plug option.
The switch can be a float switch, which will stop the pump should the acid level in the supply tank drop to empty.
The switch can also be used to stop and start the pump remotely via a controller or a timer or a remote manual switch.
SERVICE COVERAGE
DOSECO Dosing Pumps Across South Africa’s Primary Industrial Provinces
Gauteng
South Africa’s industrial heartland — mining water treatment, industrial process dosing, municipal water supply, cooling tower chemical treatment and large-scale commercial water systems.
KwaZulu-Natal
Coastal industrial water treatment, agricultural chemical dosing for subtropical horticulture, municipal supply dosing for coastal and inland communities, and sugar-industry process water treatment.
Western Cape
Wine and fruit industry irrigation dosing, water treatment for drought-resilient water management, industrial process water treatment and coastal desalination pre-treatment chemical dosing.
Free State (OFS)
Agricultural irrigation fertigation dosing, mining process water treatment, municipal potable water supply disinfection, and borehole water treatment for rural and peri-urban communities.
Eastern Cape
Industrial and automotive sector process water dosing, municipal water treatment, agricultural chemical dosing for the Eastern Cape’s extensive farming sector, and borehole water treatment solutions.
Nationwide Delivery
DOSECO supplies and supports dosing pump systems across all South African provinces. Contact us for delivery, installation support and after-sales service in your area.