AMS MF
Constant dosing or dosing proportional to 4/20 mA or 0-10 V signals or to a pulse-output water meter.
- Digital constant
- Multiply
- Divide
- PPM
- Millilitres per quintal
- Percentage
- Batch
- mA
- Volt
Solenoid dosing pumps
AMS Series
Diaphragm dosing pumps for high flow rate or high back-pressure dosing in civil, sanitary and industrial applications. Electronic adjustment of the stroke frequency and mechanical adjustment of the volume of each injection.
- Up to 220 l/h with compressed air
- Up to 25 bar
- Liquids up to 50,000 cPs
- Floor or wall mounting
220l/hMaximum flow rate
25barMaximum pressure
50,000cPsMaximum viscosity
6Models
6 models
Model selection
From the basic constant dosing model to the multifunction model with display, with integrated pH meter or Redox meter.
Available versions
AMS P MFPMMA pump head for viscous liquids up to 50,000 cPs.
Pump head: PVDF, PP, PMMA or AISI 316L
AMS pH
With integrated pH meter for automatic pH control.
- Proportional to pH
Compatible components
EpHSpH electrode
Pump head: PVDF, PP, PMMA or AISI 316L
AMS Rh
With integrated Redox meter for control of the Redox potential (ORP).
- Proportional to Redox
Compatible components
ERhSRedox (ORP) electrode
Pump head: PVDF, PP, PMMA or AISI 316L
AMS PLUS
For constant dosing and dosing proportional to a pulse-output water meter or to a 4/20 mA signal.
- Constant
- Constant with divider
- Multiply
- Divide
- mA
Pump head: PVDF, PP, PMMA or AISI 316L
AMS CL
For constant dosing, with input for tank level control.
- Constant
- Constant with divider
Pump head: PVDF, PP, PMMA or AISI 316L
AMS CO
Basic model for constant dosing without external controls.
- Constant
- Constant with divider
Pump head: PVDF, PP, PMMA or AISI 316L
Selection guide
Which model to choose
State how the pump must dose, the product, the flow rate and the back pressure: the guide proposes the most suitable model and configuration of the series, among those listed in the technical data.
Answer the questions and enter flow rate and back pressure: the recommended model appears below.
Overview
Model comparison
| Function | MF | pH | Rh | PLUS | CL | CO |
|---|---|---|---|---|---|---|
| Dosing modes | ||||||
| Constant | – | – | – | ● | ● | ● |
| Constant with divider | – | – | – | ● | ● | ● |
| Digital constant | ● | – | – | – | – | – |
| Multiply | ● | – | – | ● | – | – |
| Divide | ● | – | – | ● | – | – |
| PPM | ● | – | – | – | – | – |
| Millilitres per quintal | ● | – | – | – | – | – |
| Percentage | ● | – | – | – | – | – |
| Batch | ● | – | – | – | – | – |
| mA | ● | – | – | ● | – | – |
| Volt | ● | – | – | – | – | – |
| Proportional to pH | – | ● | – | – | – | – |
| Proportional to Redox | – | – | ● | – | – | – |
| Functions | ||||||
| Electronic flow rate adjustment | ● | ● | ● | ● | ● | ● |
| Mechanical flow rate adjustment | ● | ● | ● | ● | ● | ● |
| Digital display | ● | ● | ● | – | – | – |
| Level control | ● | ● | ● | ● | ● | – |
| Stand-by | ● | ● | ● | – | – | – |
| Flow sensor | ● | – | – | – | – | – |
| Alarm output | ● | ● | ● | – | – | – |
Operation
Dosing modes
Constant
The pump doses at a constant injection frequency, proportional to the flow rate percentage set with the analogue selector (0 – 100%).
Models: AMS PLUS, AMS CL, AMS CO
Constant with divider
Operation similar to constant dosing, with the selector adjustable between 0 and 10%: the maximum flow rate is reduced to as little as 1/10 of the rated value.
Models: AMS PLUS, AMS CL, AMS CO
Digital constant
The pump doses at a constant frequency, determined by the SPH (strokes/hour), SPM (strokes/minute) or LPH (litres/hour) values set during programming.
Models: AMS MF
Multiply
The pulses from the pulse-output water meter are multiplied by the set factor.
Models: AMS MF, AMS PLUS
Divide
The pulses from the pulse-output water meter are divided by the set factor.
Models: AMS MF, AMS PLUS
PPM
Dosing is calculated from the pulses of the pulse-output water meter and the set PPM value; the concentration of the chemical and the volume per stroke can be programmed.
Models: AMS MF
Millilitres per quintal
Dosing is calculated from the pulses of the pulse-output water meter and the set MLQ value (millilitres per quintal).
Models: AMS MF
Percentage
Dosing is calculated from the pulses of the pulse-output water meter and the set percentage (%).
Models: AMS MF
Batch
A pulse from an external contact starts the dosing of the set quantity; pause and work cycles can be programmed.
Models: AMS MF
mA
The 0-4/20 mA current signal controls dosing proportionally, between the set minimum and maximum values.
Models: AMS MF, AMS PLUS
Volt
The 0-10 V voltage signal controls dosing proportionally, between the set minimum and maximum values.
Models: AMS MF
Proportional to pH
The required pH value (SET POINT) is set: the pump measures the pH by means of a pH electrode and progressively reduces the injection frequency as the set value approaches, stopping when the SET POINT is reached.
Models: AMS pH
Proportional to Redox
The required Redox potential (ORP) (SET POINT) is set: the pump measures it by means of a Redox electrode and progressively reduces the injection frequency as the set value approaches, stopping when the SET POINT is reached.
Models: AMS Rh
Technical data
Performance and configurations
Performance varies with the working back-pressure (head) and with the characteristics of the chemical: for this reason the AMS Series is available in specific configurations.
Manual air bleed
Suitable for most chemicals: the standard configuration for the most common applications.
| Code | Max pressure (bar) | Max flow rate (l/h) |
|---|---|---|
| AMS 2505 | 25 | 5 |
| AMS 1510 | 15 | 10 |
| AMS 1015 | 10 | 15 |
| AMS 0720 | 7 | 20 |
| AMS 0340 | 3 | 40 |
| AMS 0260 | 2 | 60 |
Automatic air bleed
Required with chemicals that release gas (e.g. peroxides), to prevent the pump from becoming air-locked.
| Code | Max pressure (bar) | Max flow rate (l/h) |
|---|---|---|
| AMSA 2503,2 | 25 | 3.2 |
| AMSA 1506 | 15 | 6 |
| AMSA 1010 | 10 | 10 |
| AMSA 0713 | 7 | 13 |
| AMSA 0330 | 3 | 30 |
| AMSA 0238 | 2 | 38 |
Medium-viscosity liquids
For chemicals with a viscosity between 100 and 8,000 cPs.
| Code | Max pressure (bar) | Max flow rate (l/h) |
|---|---|---|
| AMS LPV 2505 | 25 | 5 |
| AMS LPV 1510 | 15 | 10 |
| AMS LPV 1015 | 10 | 15 |
| AMS LPV 0720 | 7 | 20 |
| AMS LPV 0340 | 3 | 40 |
| AMS LPV 0260 | 2 | 60 |
Nominal flow rate measured with water at room temperature.
High-viscosity liquids
For chemicals with a viscosity between 8,000 and 50,000 cPs.
| Code | Max pressure (bar) | Max flow rate (l/h) |
|---|---|---|
| AMS P 0802 | 8 | 2 |
| AMS P 0604 | 6 | 4 |
| AMS P 0410 | 4 | 10 |
| AMS P 0425 | 4 | 25 |
| AMS P 0140 | 1 | 40 |
Nominal flow rate measured with water at room temperature.
Compressed air
For dosing large quantities of chemical in industrial applications.
| Code | Max pressure (bar) | Max flow rate (l/h) |
|---|---|---|
| AMS AC 1050 | 10 | 50 |
| AMS AC 05140 | 5 | 140 |
| AMS AC 00220 | 0 | 220 |
Power supply options
- 230 VAC
- 110 VAC
- 24 VAC
- 24 VDC
- 12 VDC
Pump head materials
PVDF
Suitable for most acids, for peroxides and for sodium hypochlorite (chlorine).
PP
Suitable for sodium hydroxide (caustic soda).
AISI 316L
Suitable for peracetic acid and sodium hydroxide.
PMMA
Suitable for medium and high viscosity substances.
Special versions
Special versions
In addition to the standard configuration, versions dedicated to particular applications are available; the performance of each is given in the technical data. The pages by application compare the suitable pumps of all the series.
AMSA Series
Self-venting pump head, required with chemicals that release gas (e.g. sodium hypochlorite and peroxides): it vents the gas and prevents the pump from locking.
AMS LPV Series
For chemicals with a viscosity between 100 and 8,000 cPs.
AMS P Series
PMMA pump head for high-viscosity liquids, from 8,000 to 50,000 cPs.
AMS AC Series
For dosing large quantities of chemicals in industrial applications: up to 220 l/h.
Technical support
Troubleshooting and error messages
The most frequent causes of malfunction and the corrective actions to check before contacting technical support.
Insight: the pump does not prime and does not dose →If the pump…
The pump strokes normally, but the chemical is not dosed
- Air in the hydraulic circuitCheck fittings and tubing, tighten any loose ones and bleed the air.
- Suction tube emptiedThe pump has lost its prime: repeat the priming procedure.
- Foot filter cloggedRemove the lance or filter from the tank and clean it.
- Gas released by the chemicalOpen the bleed valve to discharge the gas; if this recurs, fit a self-bleeding pump head.
No strokes, or weak and damped stroke
- Valve balls blocked by crystallisation of the chemicalClean the valves and run the pump with 2 – 3 litres of water instead of the chemical; if the problem persists, replace the valves.
- Injection valve cloggedReplace the injection valve.
The pump does not switch on
- No power supplyCheck the mains connection and that the voltage matches the rated value.
- Protection fuse blownReplace the fuse with one of the same rating.
- Faulty circuit boardThe board must be replaced: contact our technical support service.
Display of the MF models
| Message | Meaning | Action |
|---|---|---|
| ALARM LEVEL | Chemical in the tank has run out. | Restore the chemical level in the tank. |
| ALARM SEFL | The flow sensor has detected an excessive number of empty strokes, or the automatic re-priming has failed. | Check the SEFL sensor, prime the pump manually, then switch it off and on again. |
| OVER FLOW | The required operating frequency exceeds the rated value. | Check the set parameters and the pump flow rate, then switch it off and on again. |
| ALARM STROKE | The set flow rate exceeds the rated value. | Check the set parameters and the flow rate, then switch the pump off and on again. |
| ALARM POWER | Supply voltage outside the permitted limits. | Check that the voltage matches the rating plate data, then switch the pump off and on again. |
| ALARM BATCH | Batch dosing interrupted by a change of state of the external contact. | Check that the connected contact matches the pump configuration, then switch off and on again. |
| INPUT OPEN | No input signal in mA or Volt mode. | Check the external signal and its connection. |
| ERROR DATA | Inconsistent set values. | Check the values again; if they are correct and the error persists, the pump is undersized for the required dosing. |
| ERROR MEM | Error in the settings memory. | Restore the factory values with the LOAD DEFAULT procedure. |
| WRONG ENTRY | Invalid setting, for example the same value for the signal minimum and maximum. | Set distinct, correct values. |
| Incorrect password | The password entered does not match the stored one. | If it has been lost, restore the value 0000 with the RESET PASSWORD procedure. |
The # symbol on the display indicates one or more active alarms, which can be viewed on the ALARM QTY screen.
LEDs of the AMS PLUS and AMS CL models
| LED | Meaning | Action |
|---|---|---|
| Steady red | Chemical run out (with level probe connected). | Restore the chemical level in the tank. |
| Red, 3 flashes per second | Mains voltage above the rated value. | Check the power supply, then switch the pump off and on again. |
| Red, 2 flashes per second | Mains voltage below the rated value. | Check the power supply, then switch the pump off and on again. |
| Red, 1 flash per second | The pump is waiting for a program to be selected. | Press SCROLL, select the program and confirm with P. |
| Steady green | Pump running in the mode indicated by the LED. | No action required. |
| Green, 1 flash every 2 seconds | Pump OFF, on the last program used. | No action required. |
| All LEDs flashing | Pump in programming mode. | Press P and SCROLL, or wait 30 seconds to exit without changes. |
Flow rate between 30 and 100%
Adjustment is linear between 30 and 100%: below 30% the actual flow rate may differ from the expected one and must therefore be checked.
Priming
Connect all the tubing, open the bleed valve and set the adjustment to 100%; start the pump and close the bleed valve as soon as the chemical comes out. With viscous liquids the operation can be assisted with a 20 cc syringe applied to the bleed port.
Factory settings
With the pump switched off, hold down both arrow keys and restore power: LOAD DEFAULT appears and the programming is reset to the factory values (password 0000).
If the problem persists, contact us. Before sending the pump for servicing, empty the pump head of chemical and dry it.
Summary
Main features
Electronic flow rate adjustment
According to the operating mode and the set parameters, the pump automatically adapts the injection frequency to ensure the required dosing.
Mechanical flow rate adjustment
The knob reduces the stroke length of the diaphragm, i.e. the volume of each injection and, consequently, the maximum flow rate. This offers two advantages:
Linear dosing: a high number of small-volume injections promotes mixing of the chemical into the water flow and avoids concentration peaks.
Accuracy at low dosing rates: with a 10 l/h pump required to dose 1 l/h, reducing the stroke length to 50% brings the maximum flow rate down to 5 l/h and doubles the injection frequency. Particularly suitable in combination with the pulse-output water meter.
Digital display
The integrated LCD display allows the pump to be programmed and its operating status to be monitored at all times.
Models: AMS MF, AMS pH, AMS Rh
Level control
The pump is supplied with a low-level probe for the tank: when the chemical runs out, it shows the alarm on the display and activates the corresponding output.
Models: AMS MF, AMS pH, AMS Rh, AMS PLUS, AMS CL
Stand-by
Pump start and stop can be controlled remotely by means of a run/stop contact from a PLC or another source.
Models: AMS MF, AMS pH, AMS Rh
Flow sensor
A flow sensor can be connected to check every single injection: if one or more injections are missed, the pump performs an automatic re-priming and recovers the lost injections; if this fails, it activates the alarm output.
Models: AMS MF
Alarm output
In the event of a fault, a volt-free contact is activated, configurable as normally open (N.O.) or normally closed (N.C.), to drive a visual or audible signalling device, send an SMS or report the event to a PLC.
Models: AMS MF, AMS pH, AMS Rh
Technical advice
Tell us about your application: our technical staff will recommend the most suitable model, configuration and accessories.