Motor driven dosing pumps accessories
Inverter 4-20MA
External contacts timer management for proportional dosing
Inverter for proportional dosing mode according to external digital current signal 4-20 mA. We strongly recommend the use of servo-ventilated motor with inverter applications.
D20 DTP controller with timer to manage external contacts (eg. water meter) synchronising the activation time of output relay: recommended for proportional dosing (dividing mode) with motor driven dosing pumps.
Pulsation dampners
Pulsation dampeners are used to smooth pulsations injections in the process plant pipe generating a continuous small flow. This application allows limits pressure loss along the pipelines and prevents interfering vibrations.
| Model and description |
| Pulsation dampener AISI 316 body/NBR membrane, volume 0,10 lt |
| Pulsation dampener AISI 316 body/NBR membrane, volume 0,35 lt |
| Pulsation dampener AISI 316 body/NBR membrane, volume 0,75 lt |
| Pulsation dampener AISI 316 body/NBR membrane, volume 1,5 lt |
| Pulsation dampener AISI 316 body / NBR membrane, volume 3 lt |
| Pulsation dampener PVC body / FPM membrane, volume 0,10 lt |
| Pulsation dampener PVC body / FPM membrane, volume 0,35 lt |
Relief or back pressure valve
BACK-PRESSURE VALVE: useful when injection point is below dosing tank to prevent siphoning effect. As a backpressure valve, installed in-line downstream of a pump, the backpressure below the metering pump is maintained.
RELIEF VALVE: opens an overflow line if the preset pressure limit is exceeded. This application also is a safety device to protect pump diaphragm. When installed in the branch of a tee it is a pressure relief valve. The valve stays closed until inlet pressure reaches the set pressure, which is adjusted by turning the spring tensioning bolt. Inlet pressure acts on the Teflon®control diaphragm opening the valve, allowing excess pressure to flow downwards through the orifice.
| Max flow | Connections | Liquid ends |
| 250 l/h | 3/8” BSPf-DN 10 | PVC-EPDM / PTFE |
| 230 l/h | 1/2” BSPm | AISI 316L |
| 1050 l/h | 1/2” BSPm -DN 15 | PVC-EPDM / PTFE |
| 420 l/h | 3/4” BSPf | AISI 316L |
| 420 l/h | 3/4” BSPf | PVC |
| 1050 l/h | 1” BSPm | AISI 316L |
| 1050 l/h | 1” BSPm | PVC |
Safety valves
A safety valve is a valve mechanism which automatically releases a liquid in the discharge line, when the pressure or exceeds preset limits of the metering pump. It saves the liquid ends and in particular the diaphragm.
| Pressure range | Connections | Liquid ends |
| 0,4m3 ÷ 12 bar | 1/2” BSPm | PVC |
| 0,4m3 ÷100 bar | 1/2” BSPm | AISI 316L |
| 1,2m3 ÷9 bar | 1” BSPm | PVC |
| 1,2m3 ÷9 bar | 1” BSPm | AISI 316L |
| 3,6m3 ÷6 bar | 1 1/2” BSPm | PVC |
| 3,6m3 ÷6 bar | 1 1/2” BSPm | AISI 316L |
| 0,4m3 ÷ 12 bar | 1/2” BSPm | PVC |
Foot valves/strainers
Available in PP, PVC and AISI 316.
Covering flow rates from 10 to 1050 l/h.
Injection valves
Available in PP, PVC and AISI 316.
Covering flow rates from 10 to 1050 l/h.
Accessory kit
Provided upon request
