Flowrox LPP-D peristaltic pumps are ideal for dosing and flow control . They provide accurate dosing in all process conditions as the pump discharge flow does not depend on the pipeline pressure . π www . valve-world . net Valve World November 2024
• Positive displacement design : This ensures consistent output volume regardless of discharge pressure , which is critical for maintaining treatment efficacy .
• Self-cleaning mechanisms : Features such as compression points that act as non-clogging valves can reduce maintenance requirements and ensure reliable operation .
• Multi-chemical compatibility : The ability to handle a range of media makes these pumps suitable for various treatment stages .
Modern metering pump designs often incorporate additional features to enhance operational safety and efficiency , such as :
• Only the tube and tube fittings are in contact with the process medium
• Integrated leak detection systems
• Energy-efficient motors with variable speed drives
These features can improve dosing accuracy while also contributing to reduced downtime and lower operational costs .
Peristaltic pump technology
Peristaltic pumps represent an alternative approach to fluid handling in wastewater treatment . Their operating principle is straightforward : 1 . A flexible hose is fitted inside a circular pump casing . 2 . Rollers attached to a rotor compress the hose . 3 . As the rotor turns , the compressed part of the hose forces fluid through . 4 . The hose ’ s restitution creates a vacuum , drawing in more fluid . This design offers several advantages in wastewater applications :
• Reduced contamination risk : The hose is the ( main ) contact element with fluid .
• Versatility : Suitable for handling abrasive slurries , corrosive chemicals and fluids with high solid content .
• Dry running capability : The pump can run dry without sustaining damage .
• Gentle fluid handling : Suitable for shear-sensitive fluids and beneficial for media containing live microorganisms used in biological treatment processes .
WASTEWATER
Some peristaltic pumps , such as those in Valmet ’ s Flowrox LPP series , feature a single roller design that may offer additional benefits :
• Improved process performance and efficiency : Capability to pump 24 / 7 . No overheating at high continuous flow rates due to the roller design that minimises friction and heat .
• Reduced friction : This can minimise wear on the hose , potentially extending its lifespan .
• Improved energy efficiency : Lower friction may translate to reduced power consumption .
• Reduced pulsation : Smoother flow characteristics can improve dosing accuracy and reduce pipe stress .
These pumps have proven particularly effective in sludge transfer applications , where their ability to handle highviscosity fluids with suspended solids is valuable .
Pinch valve innovations
Pinch valves have emerged as an alternative solution for sludge control and other challenging wastewater
Flowrox LPP-D peristaltic pumps are ideal for dosing and flow control . They provide accurate dosing in all process conditions as the pump discharge flow does not depend on the pipeline pressure . π www . valve-world . net Valve World November 2024
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