Wilo-STAR-Z 20/5-3(150mm) circulation pump 4081198

Circulation pump for heating and air conditioning systems

The Wilo-STAR-Z 20/5-3(150mm) circulation pump is a reliable device designed for circulating water in heating, air conditioning and domestic hot water systems. The pump's construction, with a bronze (Rg 5) body and a polypropylene (PP-GF) impeller, ensures durability and corrosion resistance. The connection length of 150 mm facilitates installation in various installation configurations.

Performance and energy efficiency

The Wilo-STAR-Z 20/5-3(150mm) pump offers a maximum flow rate of 3.34 m³/h and a maximum head of 4.57 m. The motor power consumption is only 93 W, which translates to low operating costs and efficient energy use. The nominal flow (BEP) is 1.481 m³/h at a head of 21.42 kPa, which guarantees optimal operating parameters in typical domestic and public building installations. It is worth noting the energy efficiency index (EEI) of 0, which indicates the high efficiency of the pump.

Construction and application

The pump has connections with a diameter of 1 1/4 inch (32 mm) with a cylindrical external gas thread (BSPP), which ensures easy connection to existing installations. The degree of protection IP44 protects the device against splashing water and external factors, allowing installation in various environmental conditions. Insulation class F ensures the safety and reliability of the pump. Designed to operate at an ambient temperature from 0 to 40°C and medium from 2 to 65°C, making it a universal solution for various applications – from underfloor heating to central heating systems. The pump is powered by a voltage of 230 V / 50 Hz, and the electrical connection is made using terminals.