Wilo-Helix V 431-1/25/E/KS/400-50 high-pressure water pump 4160548

The Wilo-Helix V 431-1/25/E/KS/400-50 is a high-pressure, multistage vertical rotary pump designed for a wide range of applications in water supply and industrial systems. It features a robust construction and high efficiency, ensuring reliable operation and low operating costs.

Construction and Application

The pump is designed for normal suction and efficient delivery of water, even with a small amount of solid particles (up to 10 mm in diameter). The pump casing is made of stainless steel 1.4301 (AISI 304L), providing excellent corrosion resistance and long service life. The impellers, diffusers, and stage housings are made of stainless steel 1.4307 (AISI 304L), further enhancing resistance to abrasion and corrosion. The pump is suitable for water supply, pressure boosting, industrial installations, fire protection systems, car washes, and irrigation systems. Its compatibility with closed-loop cooling circuits makes it a versatile solution for diverse requirements.

Performance and Operating Parameters

The Wilo-Helix V 431-1/25/E/KS/400-50 achieves a maximum flow rate of 6.5 m³/h and a maximum head of 247.4 m. The 4 kW motor is powered by 400 V at a frequency of 50 Hz. Thanks to its IE3 energy efficiency class, the pump exhibits low electrical power consumption. The maximum operating pressure is 25 bar, and the temperature range for the conveyed fluid is from -30°C to +120°C (depending on the seal version). The IP55 protection rating ensures protection against dust and water jets, enabling installation in various environmental conditions. The motor speed is 2900 rpm.

Additional Information

The pump features flanged connections with a nominal diameter DN 25 compliant with EN 1092-1 and pressure class PN 25. The installation length is 250 mm, and the height is 153 mm. The motor is standard and requires no additional configuration during installation. The use of stainless steel in all connections guarantees durability and corrosion resistance, while the F-class insulation of the motor ensures safe operation under varying temperature conditions. The pump does not include an integrated speed controller or self-priming function; the E version is equipped with an EPDM seal suitable for potable water.