The most frequently asked questions about progressive cavity pumps.
1. Is the pump reversible? (Up to what pressure?)
Yes, our progressive cavity or single screw pumps are reversible. The flow direction can be reversed based on operational needs, but it is recommended to use it only in the direction set during the order. The maximum pressure depends on the specific model (pumping stage) and the application characteristics, but generally, our pumps are designed to handle high pressures efficiently with proper precautions up to 48 bar in one direction and with balanced shafts up to 12 bar in the opposite direction, depending on the chosen model.
2. Is the pump self-priming?
Yes, our pumps are self-priming. Thanks to a very good NPSH (Net Positive Suction Head), they can self-prime without the need for a separate priming system, depending on the specific application parameters. This makes them ideal for applications where the pump must draw liquids from a certain height or when air is present in the fluid. Keep in mind that this varies depending on the type of fluid being pumped, viscosity, etc.
3. Do the pumps work at low pressures?
Our progressive cavity and single screw pumps are designed to maintain high performance even at low pressures. However, efficiency may vary depending on specific application parameters. For low-pressure applications, we recommend carefully considering the type of fluid and process requirements.
4. Is the pump suitable for dosing?
Yes, Nova Rotors offers a range of pumps suitable for dosing. Thanks to their precision and ability to handle fluids with variable viscosity, they are ideal for applications requiring precise and continuous dosing.
5. What are the advantages of progressive cavity or single screw pumps?
Progressive cavity or single screw pumps offer numerous advantages, including the ability to handle viscous fluids and suspended solids, continuous and stable flow, and a low pulsation level. They are particularly suitable for industrial and environmental applications, ensuring efficiency and reliability even in challenging conditions.
6. How can I choose the right pump for my application?
The choice of the pump depends on various factors, including the type of fluid to be pumped, viscosity, required flow rate, operating pressure, and environmental conditions. Our technical team is available to help you select the most suitable pump for your needs, providing tailored advice for each type of application.
7. Are Nova Rotors pumps suitable for sludge treatment?
Yes, our pumps are ideal for transferring sludge, including dewatered and high-viscosity sludge. Thanks to their ability to handle difficult fluids, they are particularly useful in wastewater treatment and other industrial applications.
8. Are progressive cavity pumps suitable for food-grade liquids?
Yes, our progressive cavity pumps are perfectly suited for transferring food-grade liquids. They are designed to ensure high hygiene standards and preserve product quality during transfer. The pumps are made with certified, easy-to-clean materials to ensure compliance with food safety standards.
9. Can the pumps handle viscous products at high pressure?
Yes, our progressive cavity pumps can handle viscous fluids at high pressures. Their robust structure and smart design allow efficient transfer of high-viscosity fluids such as pastes, creams, and dense materials, ensuring consistent performance even under pressure.
10. Can the pumps suction liquids containing solid particles or pieces of material?
Yes, progressive cavity pumps are ideal for suctioning liquids containing suspended solids or material pieces. Their ability to handle fluids with solid particles makes them perfect for applications such as wastewater treatment, food industry, and other industrial uses where solids are present in the fluid.
11. Can the pumps run dry?
No, progressive cavity pumps are not designed to run dry. Running without liquid can cause significant damage to internal parts, such as the rotor and stator. However, it is possible to add dry-running protection devices, such as level detection sensors and alarm systems.
12. Can accessories be added to the pumps?
Yes, accessories such as flow, temperature, and pressure sensors, recirculation bypasses, and other devices can be added to optimize performance and ensure safe and efficient operation.
13. Are the pumps suitable for ATEX risk environments?
Yes, our progressive cavity pumps are designed for use in ATEX risk environments. We offer pumps compliant with ATEX European Directive 2014/34/EU, ensuring safety in explosion-risk areas.