Overview
Accurate, versatile chemical metering pumps
Delivering flow rates that remain constant right up to 7 bar Qdos peristaltic chemical metering pumps give users a unique advantage over diaphragm metering pumps.
Qdos pumps offer long maintenance intervals, reducing the impact of process downtime and lowering the overall cost of ownership.
- Cut chemical cost through higher accuracy metering
- Simple drop-in installation eliminates ancillary equipment
- Reduced maintenance with single, no-tools, component replacement
- Flow rates from 0.1 to 2,000 litre/hr at up to 7 bar
- Cost of ownership is less than that of a diaphragm pump
Eliminate ancillary equipment
A diaphragm metering pump often requires a range of high maintenance ancillary items to function.
The Qdos pump eliminates ancillary equipment while ensuring accurate, linear and repeatable metering across all process conditions.
- No backpressure valves
- No pulsation dampener
- No degassing valves
- No foot valves and strainers
- No float switches
Total cost of ownership is less than a diaphragm pump
Typical installation comparing a diaphragm metering pump with the Qdos peristaltic metering pump
*Not required for Qdos system
ReNu pumphead technology
ReNu peristaltic pumphead technology is at the core of the Qdos pump.This ensures the delivery of accurate and repeatable flow for fluids of wide ranging viscosities.
Process uptime is maximised by facilitating quick, safe and easy pumphead removal and replacement, with no need for tools, no specialist training and no maintenance
technicians. The contained pumphead design with integral leak detection reduces wastage and eliminates operator exposure to chemicals.
Applications
Metering polymer flocculants
A major utility provider on Lake Michigan, Illinois had a requirement to clean-up wastewater run-off from a limestone quarry. They needed a solution for accurately dosing polymer flocculants. Installing a Qdos pump fitted with a ReNu PU pumphead allowed them to meet water quality standards with a low maintenance, reliable solution. The unique ReNu PU pumphead is compatible with aliphatic hydrocarbons, making it perfect for long consumable life when dosing oil based polymers. The contained pumphead ensures easy changeover with minimal mes. In addition, precision dosing of ±1%, even under varying conditions, minimises chemical expenditure.
Chemical metering with no gas locking
Victoria Water Treatment Works use Qdos chemical metering pumps to meter fluoride, chlorine and polyphosphate in the water filtration, clarification and distribution process. The pumps are employed to eliminate the gas locking problems previously experienced with pulsation diaphragm pumps. A Qdos 20 model with a tube material specifically formulated for high pressure sodium hypochlorite applications, has joined the chemical metering process. Running at between 70 and 100psi and controlled by a 4-20mA input signal, the Qdos pumps at the Victoria water treatment plant have significantly reduced maintenance downtime.
Precise delivery of electroplating chemicals
BIA Kunstoff - und Galvanotechnik is involved in electroplating plastic components with metallic surfaces for the automative industry. The Qdos pumps employed by BIA must precisely dose the chemical additives to the electroplating machines with minimal pulsation, to avoid them being "shattered". In addition to low pulsation, virtually no pump downtime and no additional accessories such as check valves, makes Qdos pumps the best choice for electroplatic duties.
Rare mineral recovery process
In vital floatation duties at British Fluorspar, twelve Qdos pumps meter reagents from mixer tanks to header tanks.
Acid grade fluorspar (fluorite) is a relatively rare industrial mineral and its extraction involves precise metering of reagents such as methyl isobutyl carbinol, sodium isopropyl xanthate, caustic soda pearl and other chemicals. Overdosing of these chemicals is a costly business which must be avoided.
Maintenance downtime cut from 1.5 hours to just five minutes
An important stage of wastewater purification at Selters (Westerwald) Germany, is the elimination of phosphates with the addition of precipitants, including ferric chloride. Ferric chloride is both chemically aggressive and abrasive and attacked the diaphragms of the pumps previously used at the sites' metering station. Technicians were replacing pump diaphragms every 3 to 4 months, and each one took at least one hour to change, plus clean up time for leaked chemical.
Qdos pumps were installed in the precipitant metering station and immediately reduced maintenance time to five minutes.
Ensuring the supply of safe drinking water
High concentrations of iron and manganese in the Canadian Barrie region, mean that a sequestering agent is required for potable water. The City of Barrie Water Operations Branch uses sodium silicate (Na2SiO3) to bind the Fe/Mn and prevent it from oxidising. The effect is aesthetic to avoid staining sanitary ware. Diaphragm metering pumps had been chosen to meter between 4-6 parts sodium silicate, until sticking ball valves and clogging caused serious maintenance issues at the unmanned site. Investing in Qdos pumps was easy for the Water Operations Department to justify on the costs of downtime and spare parts alone.
High precision chemical metering on the go
Qdos pumps are available with either mains power or 12-24V DC. If your chemical metering application involves a mobile skid or a remote location without mains power, then 12-24V Qdos meets your requirements. The 12-24V DC power option further increases the range of applications for Qdos pumping.
Control
| Functionality |
Universal + |
Universal |
Manual |
Remote |
PROFIBUS |
| Operational modes |
| Manual |
• |
• |
• |
|
• |
| Contact |
• |
• |
|
|
|
| 4-20mA |
• |
• |
|
•
|
|
| Fluid recovery |
• |
• |
• |
• |
• |
| Fault reporting |
• |
• |
• |
• |
• |
| PROFIBUS control and diagnostics |
|
|
|
|
• |
| Manual control |
| Numerical flow display |
• |
• |
• |
|
• |
| Numerical speed display |
• |
• |
• |
|
• |
| Numerical percentage of max speed display |
• |
• |
• |
|
• |
| Fluid level monitor |
• |
• |
• |
|
• |
| Max (prime) |
• |
• |
• |
|
• |
| Auto restart |
• |
• |
• |
|
• |
| Pumphead failure alarm |
• |
• |
• |
|
• |
| Remote control |
| 4-20mA input |
• |
• |
|
• |
|
| 4-20mA input two point calibration |
• |
|
|
|
|
| 4-20mA output |
• |
|
|
• |
|
| Contact input (pulse/batch) |
• |
• |
|
|
|
| Run / Stop input |
• |
• |
|
• |
|
| Run / Stop output |
• |
• |
|
• |
|
| Alarm output |
• |
• |
|
• |
|
| Remote fluid recovery |
• |
• |
|
• |
|
| Optional 24V or 110V industrial logic |
• |
• |
|
|
|
| LED Pump status icons |
| Pump status |
|
|
|
• |
|
| 4-20mA status |
|
|
|
• |
|
| Fault |
|
|
|
• |
|
| Security |
| Keypad lock |
• |
• |
• |
|
• |
| PIN lock |
• |
• |
• |
|
• |
| Power supply |
| 12-24V DC |
• |
• |
• |
• |
|
| ~100-240V AC |
• |
• |
• |
• |
• |
Control options - Universal and Universal+ models*
| Variant |
Standard pump (L) |
|
|
| Input |
5-24V DC |
| Output |
Open collector |
| Variant |
Relay module (H) |
| Input |
110V AC |
| Output |
Contact rating
110V AC, 5A
30V DC, 5A |
| Variant |
Relay module (R) |
| Input |
5-24V DC |
| Output |
Qdos 30: contact rating 110V AC,
0.5A 30V DC, 1A |
|
Qdos 20, Qdos 60, Qdos 120:
contact rating 110V AC, 5A 30V DC, 5A
|
Standard pump (L)
Input and output control option |
Relay module (H) or (R)
Input and output control option
|
ReNu pumphead
Reduced maintenance with single, no-tools, component replacement
Revolutionary ReNu pumphead technology is at the core of the Qdos pump. This ensures the delivery of accurate and repeatable flow for fluids of wide ranging viscosities.
ReNu pumphead provides accurate, linear and repeatable low pulse flow under varying process conditions.
Safe, no tools maintenance. The ReNu pumphead has an integral leak detector which eliminates operator exposure to chemicals.
Qdos pumps can be ordered with the ReNu pumphead mounted on the left or right of the pump.
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| Pumphead |
Tube material |
Max operating pressure |
Part number |
|
ReNu 20
|
SEBS
Optimised for sodium hypochlorite applications with discharge pressure from 4 to 7 bar
|
7 bar |
0M3.1800.PFP |
|
PU
Optimised for polymers with discharge pressureup to 4 bar.
Please see the chemical compatibility section for further information on suitability with other specific chemicals
|
4 bar
|
0M3.1500.PFP
|
|
ReNu 30
|
Santoprene
A general purpose pumphead with a high chemical compatibility across a range of applications
|
7 bar
|
0M3.2200.PFP
|
|
SEBS
Optimised for sodium hypochlorite, sulfuric acid and hydrogen peroxide applications with discharge pressure up to 4 bar
Please see the chemical compatibility section for further information on suitability with other specific chemicals
|
4 bar
|
0M3.2800.PFP
|
|
ReNu 60
|
Santoprene
A general purpose pumphead with a high chemical compatibility across a range of applications
|
7 bar
|
0M3.3200.PFP
|
|
SEBS
Optimised for sodium hypochlorite, sulfuric acid and hydrogen peroxide applications with discharge pressure up to 4 bar
Please see the chemical compatibility section for further information on suitability with other specific chemicals
|
4 bar
|
0M3.3800.PFP
|
|
ReNu 120
|
Santoprene
A general purpose pumphead with a high chemical compatibility across a range of applications
|
4 bar
|
0M3.4200.PFP
|
Drives and performance
|
Model |
Flow |
Max operating pressure |
| ml/min |
US GPH |
Bar |
psi |
|
Qdos 20
|
Universal+, Universal,
Manual, PROFIBUS |
0.1 – 333 |
0.001 – 5.3 |
7 |
100 |
| Remote |
0.2 – 333 |
0.003 – 5.3 |
7 |
100 |
|
Qdos 30
|
Universal+, Universal,
Manual, PROFIBUS |
0.1 – 500 |
0.001 – 7.93 |
7 |
100 |
| Remote |
0.3 – 500 |
0.005 – 7.93 |
7 |
100 |
|
Qdos 60
|
Universal+, Universal,
Manual, PROFIBUS |
0.1 – 1000 |
0.001 – 15.85 |
7 |
100 |
| Remote |
0.3 – 1000 |
0.01 – 15.85 |
7 |
100 |
|
Qdos 120
|
Universal+, Universal,
Manual, PROFIBUS |
0.1 – 2000 |
0.001 – 31.7 |
4 |
60 |
| Remote |
1.25 – 2000 |
0.02 – 31.7 |
4 |
60 |
* Flow accuracy of ±1%, repeatability of ±0.5%”
Qdos combined flow curves
| Model |
A |
B |
C |
D |
E |
F |
G |
H |
I |
| Qdos 20 |
234mm (9.2”) |
214mm (8.4”) |
118mm (4.6”) |
266mm (10.5”) |
43mm (1.7”) |
173mm (6.8”) |
40mm (1.6”) |
140mm (5.5”) |
10mm (0.4”) |
| Qdos 30 |
234mm (9.2”) |
214mm (8.4”) |
82.5mm (3.2”) |
233mm (9.2”) |
43mm (1.7”) |
173mm (6.8”) |
40mm (1.6”) |
140mm (5.5”) |
10mm (0.4”) |
| Qdos 60 |
234mm (9.2”) |
214mm (8.4”) |
118mm (4.6”) |
266mm (10.5”) |
43mm (1.7”) |
173mm (6.8”) |
40mm (1.6”) |
140mm (5.5”) |
10mm (0.4”) |
| Qdos 120 |
234mm (9.2”) |
214mm (8.4”) |
118mm (4.6”) |
266mm (10.5”) |
43mm (1.7”) |
173mm (6.8”) |
40mm (1.6”) |
140mm (5.5”) |
10mm (0.4”) |
Datasheets
Qdos range datasheet
Manuals
Qdos user manual — all models
Technical article
Reducing energy usage and greenhouse gas emissions
Learn how Qdos peristaltic chemical metering technology can help cut gas consumption, water usage and greenhouse gas emissions
Chemical compatability
This guide details chemical compatibility between the process fluid and pumphead materials only. The guide is not an indication of the suitability of the pump for your process. Please contact Watson-Marlow for further advice.
It is recommended that compatibility testing is always carried out to ensure the suitability of the ReNu pumphead for use with your process chemical fluid. Actual chemical content can differ between suppliers and brands.
The information contained in the chemical compatibility guide is believed to be correct. Watson-Marlow Fluid Technology accepts no liability for any errors it contains. It is the user’s responsibility to ensure chemical compatibility within their application.
The ReNu pumphead contains lubricant. It is the user’s responsibility to comply with local health and safety regulations, including ensuring chemical compatibility between the lubricant and the duty fluid before use.
*In some cases, compatibility between the pumphead and the chemical is particularly dependant on a number of factors including chemical source and temperature. In these cases, trials are recommended to ascertain suitability.
The Qdos pump should not be used in an ATEX environment, Hazardous environment or an environment that requires explosion proof certification.