Chlorine Dosing Pump Technical Specification and Templates

Short answer: A chlorine dosing pump technical specification is a document that defines, in measurable values, the flow rate, back pressure, control type, wetted part materials, protection rating, power supply and scope of supply of the pump required in a tender. A good specification does not describe a brand; it states the installation’s needs as “minimum” values. This page contains specification texts based on the catalogue values of the AnTech Nova, Lara, Optima and Nano series, ready to copy into tender documents, together with an acceptance checklist.

The technical values in the texts are taken from the AnTech 2025 Product Catalogue. No block contains a brand name; you can change the values in square brackets to suit your installation and remove clauses you do not need. Before writing a specification for a chlorine dosing pump, we recommend finding the required flow rate with our chlorine dosing calculator.

How to Write a Chlorine Dosing Pump Technical Specification

A specification is written backwards from the job the pump will do in the installation: first the required dosing flow rate and the line pressure at the injection point are determined, then the control method, materials and scope of supply. The table below summarises what to write in each clause and what to watch out for.

Clause	What to write in the specification	Point to note
Flow rate	Maximum required dose, L/h	Always state the flow rate together with the back pressure; in an electromagnetic pump, flow increases as pressure falls.
Back pressure	Maximum line pressure at the injection point, bar	The pump’s maximum back pressure must be above this value.
Control type	Analogue, level control, timer, volumetric (water meter or 4–20 mA), pH/ORP measurement or free chlorine measurement	If the water flow varies during the day, do not specify a constant-rate analogue pump.
Wetted part materials	Pump head, diaphragm, balls, O-rings, suction and discharge assemblies	State the chemical and its concentration first, then specify the materials accordingly.
Protection rating	IP rating of the housing	All AnTech electromagnetic series have IP65 housings.
Power supply	Voltage and frequency; power consumption if required	If a wide voltage range is needed, state it separately.
Inputs and outputs	Level, flow, water meter and 4–20 mA inputs; alarm and 4–20 mA measurement output; communication protocol	If the pump will be connected to automation, state the signal type and protocol (e.g. ModBus RTU, RS485).
Level control	Level sensor and input for the chemical tank	Prevents dosing from stopping unnoticed when the tank runs empty.
Calibration	Capacity calibration; sensor calibration on measurement-controlled models	Add calibration solutions to the scope of supply separately.
Scope of supply	Suction and discharge assemblies, hoses, mounting kit, signal cable, electrode or sensor, housing	Measuring elements and signal cables are often separate items.

When stating the flow rate, make sure the pump does not hit its capacity limit at peak demand; it must be possible to raise the pump setting when the solution concentration falls or consumption increases. State the line pressure from a measurement at the injection point, not an estimate.

How to Select Wetted Part Materials

The materials of the wetted parts are specified according to the chemical to be dosed and its concentration. The chemical resistance list in the Technical Documents section of the AnTech catalogue offers a starting point for the materials used in dosing pumps:

Chemical	PVDF	PP	PVC	PTFE	FPM (Viton)	EPDM	PE	SS316
Sodium hypochlorite 12.5%	Resistant	Good	Resistant	Resistant	Resistant	Resistant	Resistant	Not resistant
Hydrochloric acid	Resistant	Resistant	Resistant	Resistant	Resistant	Not resistant	Resistant	Not resistant
Sulphuric acid 85%	Resistant	Resistant	Resistant	Resistant	Resistant	Not resistant	Resistant	Good

According to the list, stainless steel (SS316) is not resistant to sodium hypochlorite, and EPDM is not resistant to hydrochloric and sulphuric acid; EPDM O-rings should therefore not be specified for a pump dosing acid as a pH reducer. In AnTech electromagnetic pumps the diaphragm is PTFE and the standard O-rings Viton; on the Nova, Lara and Optima the head is PVDF. The suction and discharge assemblies are PVDF on the Nova and PP on the Lara, Optima and Nano; an option with a PVDF kit for the Lara is also listed in the catalogue. If your chemical is not in the list or its concentration differs, send us its name and concentration and we will check it together.

Sample Specification Texts by Series

The texts below are written to the catalogue values of the AnTech series and contain no brand name. Under each block, the AnTech models that meet the text are given for information only. Add the common clauses first, then the block that matches your control type, to the tender documents. For a general introduction to the series, see our AnTech dosing pump page, and to see all capacities side by side, our dosing pump models page.

Common clauses: all electromagnetic dosing pumps

The pump shall be a diaphragm dosing pump driven by an electronically controlled electromagnet (solenoid).
The diaphragm shall be PTFE (Teflon).
The materials of the pump head, balls, O-rings and suction and discharge assemblies shall be stated individually in the offer and shall be suitable for [12.5% sodium hypochlorite] solution.
The protection rating of the pump housing shall be at least IP65.
The pump shall be able to operate at an ambient temperature of 0–45 °C and a chemical temperature of 0–40 °C.
The flow rate shall be adjustable while the pump is running.
The pump shall be suitable for vertical mounting, and its head shall have an air-bleed connection.
The suction assembly and discharge (injection) assembly shall be supplied with the pump.

For chemicals that can release gas, such as sodium hypochlorite, a head with automatic air bleed may be specified. At AnTech this head assembly is offered as an option for the Nova 3.5 and 10 L/h capacities and the Lara 2 L/h 20 bar capacity.

Analogue pump with level control (Nova A)

The flow rate shall be adjusted by changing the stroke rate with the adjustment knob on the pump; 1/10 and 1/100 fine adjustment steps shall be provided for low flow rates.
The pump shall have at least two liquid level control inputs, and a suction assembly with a level sensor shall be supplied with the pump.
The pump shall operate on a mains voltage in the range of 95–260 V AC, 50–60 Hz.
The pump head and the suction and discharge assemblies shall be PVDF.
A wall-mounting kit and a mounting foot for flat surfaces shall be supplied with the pump.
The pump shall deliver at least [10] L/h at [10] bar back pressure; the suction connection shall suit [4×6] mm hose and the discharge connection [4×7] mm hose.

AnTech models that comply: AnTech Nova A 10 L/h 10 Bar and the 3.5 L/h 20 bar (suction 4×6, discharge 4×7 mm) and 25 L/h 5 bar (suction and discharge 9×12 mm) capacities of the same type. Series details are on the AnTech Nova series page.

Digital volumetric pump (Nova D)

Clauses 2–6 of the Nova A block also apply to this block. Additional clauses:

The pump shall be digitally controlled with an LCD display; the flow rate shall be enterable as L/h, strokes/minute, strokes/hour or a percentage.
Manual, real-time clock, periodic and trigger-input operating modes shall be provided.
The pump shall perform proportional (volumetric) dosing on the signal from a water meter or flow meter; a volumetric operating mode in which the target concentration is entered in ppm shall be provided.
The pump shall be controllable by a 4–20 mA, 20–4 mA, 0–20 mA and 20–0 mA analogue signal.
Chemical and water level sensor inputs, a flow sensor input and a PT100 temperature sensor input shall be provided.
Capacity calibration, operating limits, an alarm output and password protection shall be provided.
[Optional] The pump shall be connectable to plant automation via the ModBus RTU (RS485) protocol; the necessary communication module and signal cable shall be included in the scope of supply.

AnTech models that comply: AnTech Nova D 10 L/h 10 Bar and the 3.5 L/h 20 bar and 25 L/h 5 bar capacities. On Nova digital models the communication module and signal cable set are sold separately; if you include clause 7, request these items separately in the offer.

Pump with pH/ORP measurement (Nova DMPR)

In addition to all clauses of the Nova D block:

The pump shall perform proportional dosing based on pH or ORP (redox) measurement.
Sensor calibration shall be possible from the pump menu.
The measured value shall be transmittable to the automation system via a 4–20 mA output.
The [pH / ORP] electrode, electrode holder and calibration solutions shall be included in the scope of supply.

AnTech models that comply: AnTech Nova DMPR 10 L/h 10 Bar and the 3.5 and 25 L/h capacities of the same type. Electrode sets are separate items in the catalogue: P-coded sets for pH and R-coded sets for ORP come with the electrode, holder and calibration solution.

Pump with free chlorine measurement (Nova DMİA)

In addition to all clauses of the Nova D block:

The pump shall measure free chlorine by the amperometric method and adjust the dose proportionally to the measured value.
[Optional] With a suitable sensor, it shall be possible to measure chlorine dioxide, hydrogen peroxide and peracetic acid.
Sensor calibration shall be possible from the pump menu, and the measured value shall be transmittable via a 4–20 mA output.
A free chlorine sensor with a [0–2 ppm] measuring range and a sensor housing shall be included in the scope of supply.

AnTech models that comply: AnTech Nova DMİA 10 L/h 10 Bar and the other two capacities. Sensor options in the catalogue: 0–2 ppm and 0–5 ppm selective free chlorine sensors, a 0–10 ppm amperometric free chlorine cell, and 0–10 ppm chlorine dioxide and 0–500 ppm hydrogen peroxide sensors.

Common clauses for the Lara series (Lara A, APS, DS, DMS, PR)

The pump head shall be PVDF.
The pump shall operate on 230 V AC, 50 Hz mains.
The suction assembly, discharge assembly, connecting hoses and check valve set shall be supplied with the pump.
The pump shall deliver at least [2] L/h at [10] bar back pressure; the suction and discharge connections shall suit [4×6] mm hose.

The Lara capacities are 2 L/h 10 bar, 5 L/h 7 bar, 10 L/h 5 bar and 2 L/h 20 bar. The suction connection is 4×6 mm on all capacities; the discharge connection is 4×7 mm on the 2 L/h 20 bar model and 4×6 mm on the others. Series details are on the AnTech Lara series page. Add one of the following clauses according to the control type:

Analogue (Lara A): The flow rate shall be adjusted by changing the stroke rate with the adjustment knob; the pump shall have an on/off button.
Analogue with level control (Lara APS): The flow rate shall be adjusted with the adjustment knob; a 1/10 fine adjustment step that reduces the flow to one tenth and liquid level control shall be provided, and a suction assembly with a level sensor shall be supplied with the pump.
Digital, timer-controlled (Lara DS): The pump shall have a digital display and a microcontroller; a timer operating mode, two inputs configurable as liquid level or flow control, and a user password shall be provided; a suction assembly with a level sensor shall be supplied with the pump.
Digital, volumetric (Lara DMS): The pump shall have a digital display; timer operation and a user password shall be provided; when connected to a water meter it shall perform volumetric proportional dosing according to the water passing through; a 4–20 mA analogue input and a liquid level alarm relay shall be provided; a suction assembly with a level sensor and a signal cable shall be supplied with the pump.
pH/ORP measurement (Lara PR): The pump shall measure pH or ORP with a standard combination electrode and adjust the dose according to the measurement; digital calibration with buffer solutions and a measurement delay at start-up adjustable between 0 and 60 minutes shall be provided; it shall be able to perform volumetric proportional dosing with a water meter or flow meter; a 4–20 mA analogue input, a liquid level alarm relay, a timer and a user password shall be provided; a [pH / ORP] electrode set and signal cable shall be included in the scope of supply.

AnTech models that comply: The four capacities of each control type, for example the AnTech Lara DMS 5 L/h 7 Bar and the AnTech Lara PR 5 L/h 7 Bar. On the Lara DMS the signal cable set is included in the package; on the Lara PR the signal cable and electrode set are sold separately.

Analogue pump with published flow–pressure values (Optima A)

The flow rate shall be adjusted by changing the stroke rate with the adjustment knob on the pump; the pump shall have an on/off button.
The pump head shall be PVDF and the O-rings [Viton / PTFE].
The pump shall operate on 230 V AC, 50–60 Hz mains.
The suction assembly, discharge assembly and check valve set shall be supplied with the pump.
The pump shall deliver at least [5] L/h at [10] bar back pressure and at least [10] L/h at [1] bar back pressure; the suction and discharge connections shall suit 4×6 mm hose.

AnTech models that comply: AnTech Optima A 5 L/h 10 Bar and its version with Teflon O-rings; for the 2.5 L/h capacity the values are 2.5 L/h at 15 bar and 8 L/h at 1 bar. Series details are on the AnTech Optima series page.

Compact analogue pump (Nano A)

The flow rate shall be adjusted by changing the stroke rate with the adjustment knob on the pump.
The pump shall operate on 230 V AC, 50 Hz mains, with a maximum power consumption of [10] W.
The suction assembly, discharge assembly, connecting hoses and check valve set shall be supplied with the pump.
The pump shall deliver at least [2] L/h at [10] bar back pressure; the suction and discharge connections shall suit 4×6 mm hose.

AnTech models that comply: AnTech Nano A 2 L/h 10 Bar and Nano A 5 L/h 5 Bar. Series details are on the AnTech Nano series page.

Mistakes to Avoid in a Specification

The most common mistake is writing the specification from a single product’s catalogue page rather than from the installation’s needs; this narrows competition and can lead to questions and objections during the tender.

Stating a brand, model code or a name that belongs to only one product: Instead, state performance criteria such as flow rate, back pressure, control type, materials and protection rating as “minimum” values.
Making weight, package dimensions or stroke rate mandatory: These values describe a particular housing, not the function. Do not include them unless they are genuinely required.
Stating flow rate without pressure: The flow rate of an electromagnetic pump changes with back pressure. For example, according to catalogue values, a 10 L/h 10 bar Nova model delivers 20 L/h at 2 bar. Always state flow rate together with pressure.
Specifying materials without stating the chemical: Stainless steel is not suitable for every chemical; according to the catalogue list, it is not resistant to sodium hypochlorite. State the chemical and concentration first, then the material.
Specifying a constant-rate pump for a variable-flow line: If the water flow varies during the day, specify volumetric control with a water meter or measurement-based control; otherwise the water will sometimes receive too much chlorine and sometimes too little.
Leaving measuring elements out of scope: The electrode, sensor, housing, calibration solution and signal cable of a measurement-controlled pump are often separate items. List them individually in the scope of supply.
Specifying higher values than needed: Requiring a 20 bar pump on a 6 bar line, or a communication module that will not be used, increases cost for no reason.
Using an unverified item number: In Turkish public tenders, an old item (poz) number or one taken from another list causes errors in the survey and offer documents.

How to Find the Item Number for a Chlorine Dosing Pump in Türkiye

In Turkish public tenders, the item (poz) for a chlorine dosing pump is found from its description in the unit price list used by the contracting authority. We do not give item numbers on this page; check the number in the authority’s unit price list. Send us the description from the list and we will check together which AnTech model meets its flow, pressure and control requirements; if you cannot find a suitable description, send us the values from your specification instead.

For survey and offer documents, the current chlorine dosing pump unit price of each model on our site is shown excluding VAT. Because prices are recalculated every day with the exchange rate, note the date on which you took the price. For a dated quotation, a data sheet or a multi-unit tender purchase, send your list of requirements through our contact page.

Acceptance and Commissioning Checklist

A delivered pump is first accepted by comparing it against the values in the specification, then commissioned on site by measuring its flow rate. You can use the list below as the basis for the acceptance report.

Delivery check

Are the model and capacity (flow rate and back pressure) on the pump label the same as in the specification and the offer?
Does the supply voltage on the label match the value in the specification?
Is the scope of supply complete: suction and discharge assemblies, hoses, check valve or mounting kit, signal cable, electrode or sensor, housing, calibration solutions?
Are the materials of the wetted parts the same as those stated in the offer?
Are the packaging and pump housing undamaged?

Commissioning

Has the pump been mounted close to the chemical tank, in an upright position, in a dry, ventilated place out of direct sunlight?
Has the line pressure at the injection point been measured, and is it below the pump’s maximum back pressure?
Has the pump been connected to an earthed circuit protected by a residual current device?
Was the air bled at first start-up, and is the chemical arriving steadily?
Has the flow rate been verified? The chemical drawn from a graduated container over a set time is measured and compared with the setting; on digital models, capacity calibration is done from the menu.
On a level-controlled model, does the level sensor signal reach the pump?
On a pH/ORP model, has the electrode been calibrated? The catalogue lists pH 4, pH 7 and pH 10 buffer solutions, and 225 mV and 475 mV ORP calibration solutions.
On a free chlorine model, has the sensor reading been compared with a measurement taken with a portable instrument or test kit?
If a 4–20 mA or ModBus connection was requested, is the value being read in the automation system?
Have the settings, measured flow rate and calibration results been recorded in the report, and have the operating staff been shown how to use the pump?

If you would like us to carry out installation and commissioning, you can request our dosing pump installation and calibration and sensor replacement services.

Sources

AnTech 2025 Product Catalogue (KT_25 R02): feature lists, technical specification tables, flow–pressure values, included parts and spare parts tables and calibration solutions for the Nova, Lara, Optima and Nano series; the chemical resistance list in the Technical Documents section.

Frequently Asked Questions

What should a chlorine dosing pump technical specification include?

Flow rate together with back pressure, the maximum line pressure at the injection point, control type, wetted part materials, protection rating, power supply, inputs and outputs, level control, calibration and scope of supply. The name and concentration of the chemical must always be stated as well.

Where can I find the item number for a chlorine dosing pump in Turkish public tenders?

In the unit price list used by the contracting authority. We do not give item (poz) numbers, because an unverified number can cause errors in the documents. Send us the description from the list and we will check together which model meets it.

Can a brand or model be named in the specification?

To avoid narrowing competition, we recommend stating performance criteria instead of brand and model names. The texts on this page were prepared with this approach; the AnTech models that comply are given under the blocks for information only.

Where were the values in the specification texts taken from?

From the feature lists, technical tables and chemical resistance list in the AnTech 2025 Product Catalogue. We did not write clauses for values that are not in the catalogue; if you need an additional value, ask us.

Should the sensor of a measurement-controlled pump be specified separately?

Yes. The electrode set on pH/ORP pumps, and the sensor and sensor housing on the free chlorine pump, are separate items from the pump. Also add calibration solutions and, if required, the signal cable to the scope of supply.

How is the flow rate of a delivered pump checked?

While the pump draws chemical from a graduated container, the volume drawn over a set time is measured and compared with the setting. On digital models, capacity calibration is done from the menu using the measured value. The result is recorded in the acceptance report.