Dosing Pumps

Solenoid diaphragm dosing pumps and the accessories that complete a dosing point. The Seko Tekna 603 size (AKS603, TPG603, TPR603) delivers 4 L/h at 12 bar up to 8 L/h at 2 bar from a 100-240 V AC supply, with PVDF pump heads, PTFE diaphragms, 4/6 mm tube connections and an IP65 enclosure. The AKS603 runs at a manually set constant rate; the TPG603 adds 4-20 mA and water-meter pulse proportional dosing; the TPR603 has a built-in pH/Redox controller. The compact Seko Kompact AMS200 covers smaller analogue duties up to 10 bar. Flowmeters from 25 to 50 mm for proportional dosing, TPR probes and the PSS3 in-line probe holder are stocked, with 80 L and 100 L chemical tanks and Ezi-action 25/5 hand drum pumps for decanting 20-30 L containers.

We're still adding our full range and more datasheets. If a part isn't listed, send us the code: we stock and source more than this catalogue shows.

How to choose

Choose the control mode first: constant manual rate (AKS603), proportional to flow or a 4-20 mA signal (TPG603), or closed-loop pH/Redox control (TPR603, with probe and holder). Then check the duty point against real back pressure at the injection point: the Tekna 603 gives 4 L/h at 12 bar and 8 L/h at 2 bar, and Seko quotes these figures with its standard injection fitting installed. For flow-proportional dosing, size the flowmeter to the main line (25, 32, 40 or 50 mm). Pumps must be installed out of sun and weather, at ambient temperatures up to 40 °C. Size the chemical tank for the dosing rate and refill interval, and specify the drum pump adaptor to suit the container neck.

Tick lines to compare them side by side or add them to your quote list together.

Dosing pumps4 lines

All lines: Stroke rate 160 strokes/min · Tube connections 4/6 mm suction and discharge · Installation kit Foot filter, injection valve, 4 m PVC suction tube, 2 m PE delivery tube


DOSAMS200Compact analogue pump Seko Kompact AMS200 solenoid dosing pump, 5 L/h, 10 bar max.Datasheet	Analogue, constant or proportional; low-level alarm	5 L/h at 8 bar (230 V AC version)	10 bar at 3 L/h (230 V AC version)	230 V AC 50/60 Hz (24 V AC and 24 V DC versions exist)	PVDF-T / PTFE	8–12 weeksIndent
SEKOAKS603Constant, manual control Seko Tekna AKS603 solenoid dosing pump, 8 L/h, 12 bar max.Datasheet	Constant, manual knob (0-20 % and 0-100 % ranges), level input	8 L/h at 2 bar	12 bar at 4 L/h	100-240 V AC 50/60 Hz, 17-22 W	PVDF / PTFE	8–12 weeksIndent
DOSTPG603Digital, proportional control Seko Tekna TPG603 solenoid dosing pump, 8 L/h, 12 bar max.Datasheet	Digital: constant, or proportional to 4-20 mA or pulse water meter; timer; ppm mode	8 L/h at 2 bar	12 bar at 4 L/h	100-240 V AC 50/60 Hz, 15-22 W	PVDF / PTFE	8–12 weeksIndent
DOSTPR603Built-in pH/Redox control Seko Tekna TPR603 solenoid dosing pump, 8 L/h, 12 bar max.Datasheet	Built-in pH/Redox controller; constant or proportional to measured value; PT100 input; 4-20 mA output	8 L/h at 2 bar	12 bar at 4 L/h	100-240 V AC 50/60 Hz, 15-22 W	PVDF / PTFE	8–12 weeksIndent

DOSAMS200Compact analogue pump
Seko Kompact AMS200 solenoid dosing pump, 5 L/h, 10 bar max.
Control
Analogue, constant or proportional; low-level alarm
Max. flow rate
5 L/h at 8 bar (230 V AC version)
Max. back pressure
10 bar at 3 L/h (230 V AC version)
Power supply
230 V AC 50/60 Hz (24 V AC and 24 V DC versions exist)
8–12 weeksIndentDatasheet (PDF)
SEKOAKS603Constant, manual control
Seko Tekna AKS603 solenoid dosing pump, 8 L/h, 12 bar max.
Control
Constant, manual knob (0-20 % and 0-100 % ranges), level input
Max. flow rate
8 L/h at 2 bar
Max. back pressure
12 bar at 4 L/h
Power supply
100-240 V AC 50/60 Hz, 17-22 W
8–12 weeksIndentDatasheet (PDF)
DOSTPG603Digital, proportional control
Seko Tekna TPG603 solenoid dosing pump, 8 L/h, 12 bar max.
Control
Digital: constant, or proportional to 4-20 mA or pulse water meter; timer; ppm mode
Max. flow rate
8 L/h at 2 bar
Max. back pressure
12 bar at 4 L/h
Power supply
100-240 V AC 50/60 Hz, 15-22 W
8–12 weeksIndentDatasheet (PDF)
DOSTPR603Built-in pH/Redox control
Seko Tekna TPR603 solenoid dosing pump, 8 L/h, 12 bar max.
Control
Built-in pH/Redox controller; constant or proportional to measured value; PT100 input; 4-20 mA output
Max. flow rate
8 L/h at 2 bar
Max. back pressure
12 bar at 4 L/h
Power supply
100-240 V AC 50/60 Hz, 15-22 W
8–12 weeksIndentDatasheet (PDF)

Chemical dosing tanks2 lines

	Photo				Quote
		CHEMTANK80L80 L, square Chemical dosing tank, 80 L, square	80 L	Ex-stock (0–3 days)Low stock
		CHEMTANK100L100 L Chemical dosing tank, 100 L	100 L	8–12 weeksIndent

CHEMTANK80L80 L, square
Chemical dosing tank, 80 L, square
Capacity
80 L
Ex-stock (0–3 days)Low stock
CHEMTANK100L100 L
Chemical dosing tank, 100 L
Capacity
100 L
8–12 weeksIndent

Flowmeters and probes6 lines


DOSTPG603F2525 mm Flowmeter 25 mm for Seko Tekna TPG603 proportional dosing	Flowmeter	25 mm	Seko Tekna TPG603	—	—	—	8–12 weeksIndent
DOSTPG603F3232 mm Flowmeter 32 mm for Seko Tekna TPG603 proportional dosing	Flowmeter	32 mm	Seko Tekna TPG603	—	—	—	8–12 weeksIndent
DOSTPG603F4040 mm Flowmeter 40 mm for Seko Tekna TPG603 proportional dosing	Flowmeter	40 mm	Seko Tekna TPG603	—	—	—	8–12 weeksIndent
DOSTPG603F5050 mm Flowmeter 50 mm for Seko Tekna TPG603 proportional dosing	Flowmeter	50 mm	Seko Tekna TPG603	—	—	—	8–12 weeksIndent
DOSTPR603PProbe Probe for Seko Tekna TPR603 dosing pump	Probe	—	Seko Tekna TPR603	—	—	—	8–12 weeksIndent
DOSTPR603PH12Probe holder, 12 mm Seko PSS3 in-line probe holder, 12 mm sensor adapter	In-line probe holder	12 mm sensor adapter (PG 13.5 also accepted)	Seko Tekna TPR603 probe	1/2" G male	PVC	0-60 °C	8–12 weeksIndent

DOSTPG603F2525 mm
Flowmeter 25 mm for Seko Tekna TPG603 proportional dosing
Type
Flowmeter
Size
25 mm
For use with
Seko Tekna TPG603
8–12 weeksIndent
DOSTPG603F3232 mm
Flowmeter 32 mm for Seko Tekna TPG603 proportional dosing
Type
Flowmeter
Size
32 mm
For use with
Seko Tekna TPG603
8–12 weeksIndent
DOSTPG603F4040 mm
Flowmeter 40 mm for Seko Tekna TPG603 proportional dosing
Type
Flowmeter
Size
40 mm
For use with
Seko Tekna TPG603
8–12 weeksIndent
DOSTPG603F5050 mm
Flowmeter 50 mm for Seko Tekna TPG603 proportional dosing
Type
Flowmeter
Size
50 mm
For use with
Seko Tekna TPG603
8–12 weeksIndent
DOSTPR603PProbe
Probe for Seko Tekna TPR603 dosing pump
Type
Probe
For use with
Seko Tekna TPR603
8–12 weeksIndent
DOSTPR603PH12Probe holder, 12 mm
Seko PSS3 in-line probe holder, 12 mm sensor adapter
Type
In-line probe holder
Size
12 mm sensor adapter (PG 13.5 also accepted)
For use with
Seko Tekna TPR603 probe
Process connection
1/2" G male
8–12 weeksIndent

Lead times are indicative estimates only, based on typical supply at time of publication, and are confirmed at order acceptance. They show our usual longest sourcing time. We can often supply sooner from our network of local suppliers. Actual times may vary with supplier stock, manufacturing, importation, customs and logistics. Only a written quotation or order confirmation commits DWT to a delivery time.