Circulation pump UP 20-45N 150 95906472

Grundfos UP 20-45N Circulation Pump – Reliability and Efficiency in Every System

The Grundfos UP 20-45N is a canned motor circulation pump designed for circulating water in central heating and domestic hot water systems. The wet rotor design means the pump motor is cooled by the flowing liquid, which increases its lifespan and reliability. This solution minimizes the risk of damage caused by overheating and ensures quiet operation.

Construction and Application

The UP 20-45N pump is characterized by its compact design and ease of installation. It is designed to work with installations of various sizes, both in residential and commercial buildings. Made of high-quality materials, including stainless steel (body) and special PES/PP composite (impeller), it guarantees corrosion resistance and long-term use. The shaft and thrust bearing made of ceramic ensure smooth and trouble-free operation.

Key features:

• Wet rotor: Ensures quiet operation and motor cooling, extending its lifespan.
• Body material: Stainless steel (grade 304 – 1.4301) guarantees corrosion resistance and resistance to aggressive media.
• Impeller: Made of durable PES/PP composite, resistant to abrasion and corrosion.
• Installation length: 150 mm – facilitates integration with existing installations.
• Head: Up to 4.5 meters – allows for effective heat distribution in systems of varying heights.
• Nominal flow rate: 2.29 m³/h – provides adequate water circulation in the installation.
• Power consumption: 0.12 kW – low power consumption translates into energy savings.
• Operating temperature: A wide range of operating temperatures from -25°C to +110°C allows the pump to be used in various environmental conditions.

Installation and Operation

The UP 20-45N pump has BSPP threaded connections with a diameter of 1 ¼ inch (32 mm), which facilitates its connection to existing piping installations. The pump is powered by 230V, and the electrical connection is made using terminals. The pump does not require additional lubrication, as the bearings are lubricated by the flowing liquid. Insulation class F ensures safe use in various environmental conditions. It is important to maintain appropriate working pressure, which must not exceed 10 bar.