Two reagents
The system combines ammonia (NH3) and sodium hypochlorite (NaClO) to produce monochloramine.
Generation and dosing
MDS
Compact system for the automatic generation of monochloramine (NH2Cl), for drinking water or industrial use. Two reagents of known concentration are dosed together with the dilution water into a PVDF reactor, up to 2 g/l (2,000 ppm).
- Monochloramine from 50 to 5,000 g/h
- Continuous, not pulsed, dosing
- Ultrasonic flow meters
- 7" touch HMI and Modbus TCP/IP
50 – 5,000g/hMonochloramine
2g/lConcentration
0.5 – 5ppmDosing range
7"Touch screen
How it works
Monochloramine generation
Generation is managed by the controller and can be slaved to a flow meter on the water to be treated.
PVDF reactor
The two reagents and the dilution water are fed simultaneously into the reactor, up to a monochloramine concentration of 2 g/l.
Three safeguards
Monitoring of the reagent 1 pump, the reagent 2 pump and the minimum flow of dilution water, by means of ultrasonic flow meters.
Components
System components
Prisma pumps
Two self-priming diaphragm pumps with stepper motor, pump head with PTFE diaphragm and PVDF valves, for uniform, continuous dosing with precise flow control.
Prisma pumps →Ultrasonic flow meters
One for each pump (“Control Flow”) and one for the dilution water: they provide the controller with real-time feedback and allow automatic adjustment of dosing.
Pressure gauges with diaphragm seal
They indicate the operating pressure of each pump; the diaphragm seal protects them from contact with the chemicals.
Back-pressure valve
It prevents siphoning even when the injection point is lower than the tanks.
Safety
Reagent low-level sensors, leak collection tray and safety doors.
Controller
7" colour touch HMI that manages generation and dosing; Ethernet port with Modbus TCP/IP.
Functions
Dosing modes
Automatic calculation
The controller calculates the quantities of the two reagents according to the required monochloramine output.
Concentration
The percentage concentration of the reagents used is set.
Proportional
In proportion to the 4-20 mA signal from the flow meter on the water to be treated.
Manual
Operation at the set flow rate; pump calibration can be performed from the controller.
Technical data
Technical data
Models
| Model | Maximum monochloramine | Maximum pressure |
|---|---|---|
| Model 1 (100) | 1,000 g/h | 10 bar |
| Model 2 (200) | 2,000 g/h | 7 bar |
| Model 3 (300) | 3,000 g/h | 5 bar |
| Model 4 (500) | 5,000 g/h | 4 bar |
Other models on request.
General data
| MDS | |
|---|---|
| Monochloramine output | From 50 to 5,000 g/h |
| Concentration in the reactor | 2 g/l (2,000 ppm) |
| Dosing range | 0.5 – 5 ppm |
| Power supply | 230 VAC 50/60 Hz, 500 W |
| Protection | IP65 |
| Cabinet | HDPE, 750 × 1,500 mm, depth 560 mm |
| Communication | Ethernet, Modbus TCP/IP |
Remote control
Integration into the plant
Ethernet port with Modbus TCP/IP for integration into the PLC or SCADA; all alarms can be transmitted remotely.
Ethernet
Connection to the web portal via network cable: measurements, set points, dosing and alarms accessible from PC, tablet and smartphone.
Modbus TCP/IP
Integration into your PLC or SCADA via Ethernet network.
0-4/20 mA output
Current signal proportional to the measured value, for remote monitoring or for controlling pumps and other instrumentation.
Diagram
Front and rear view
Front view
Rear view
Applications
Applications
Drinking water
Drinking water and groundwater.
Legionella
Legionella control in domestic water circuits.
Industry
Food industry, cooling towers, reverse osmosis.
Wastewater
Wastewater.
Installations
Installation examples
Systems are supplied pre-assembled and tested, in the form best suited to the plant room: on a panel, in a cabinet or on a skid (with cover, in a box or on a frame), also tailor-made. Some examples.
On a panel
Controller, pumps, probe holder and accessories mounted and wired on a wall panel.
In a cabinet
System panel and chemical tanks housed in a single cabinet.
Wall cabinet
Pipework, pumps and electrical panel in a wall cabinet with door.
Skid with cover
Skid with raised stainless steel frame and protective PMMA cover.
Skid in a box
Skid enclosed in a box with door, with the chemical tanks at the base.
Skid on a frame
Skid on a frame with doors, pre-assembled and ready for connection.
On the tank
Dosing pump mounted directly on the tank: the most compact solution.
In the plant room
Wall installation in the plant room, with the chemical tanks on the floor.
Pumps, controllers or components supplied by the customer can also be fitted, with custom dimensions, back panel and electrical panel. Dosing stations and skids →
Plant sizing
Tell us the water flow rate to be treated and the required dosage: we will propose the most suitable model and installation configuration.