GRUNDFOS CM 3‑4A 0.5 kW PUMP

Product Description

The Grundfos CM 3‑4A is a horizontal multistage centrifugal water pump designed for reliable clean water transfer, pressure boosting, and supply applications in domestic, commercial, heating and industrial environments. It features a compact, quiet design with robust cast iron construction and stainless‑steel internal components that deliver consistent performance and long service life. The pump’s multistage design enables it to generate sufficient head for tank feed systems, pressure boosting or circulation duties while remaining energy efficient.

Key Benefits and Features

• Efficient horizontal multistage centrifugal design delivers steady flow and pressure for water transfer, boosting and circulation tasks.
• Cast iron pump housing with stainless‑steel internal components ensures durability and corrosion resistance.
• IP55 motor protection and F‑class insulation provide reliability in diverse operating conditions.
• Rated at ~0.5 kW (~0.7 HP) with robust motor suitable for continuous operation.
• Designed for standard single‑phase 220–240 V electrical supply making it easy to integrate into existing systems.
• Suitable for pumping clean, non‑aggressive water in domestic, commercial and light industrial applications.
• Compact footprint and quiet operation simplify installation in tight mechanical spaces.

Essential Specifications

• Model name: Grundfos CM 3‑4A horizontal multistage centrifugal pump.
• Pump type: Horizontal multistage centrifugal clean water pump.
• Motor power: 0.5 kW (~0.7 HP).
• Voltage: 1 × 220–240 V AC single‑phase; 50 Hz.
• Rated current: ~3.1–3.2 A.
• Speed: ~2730–2900 rpm.
• Maximum head: ~27–28 m at nominal conditions.
• Nominal flow rate: ~3.1 m³/h (varies with operating point).
• Connections: 1 inch inlet and 1 inch outlet (Rp threads).
• Materials: Cast iron pump housing; stainless steel impeller and internal components.
• Enclosure class: IP55 for motor protection.
• Insulation class: F.
• Maximum operating pressure: ~10 bar suitable for typical water systems.
• Liquid temperature range: 0 °C to ~90 °C.
• Applications: Clean water transfer, pressure boosting, tank feed, irrigation support, air‑conditioning and heating circulation systems.