Standardised Horizontal Pump CM 3-4 A-R-A-E-AVBE F-A-A-N

The Grundfos CM 3-4 A-R-A-E-AVBE pump, reference 96806807, is part of the range of horizontal multistage centrifugal pumps CM, known for their reliability, low noise level, and compact design. Designed for applications in commercial buildings, it is ideal for heating, air conditioning, and pressure boosting systems.

This pump features an axial suction and radial discharge configuration, with impellers, shaft, and chambers made of AISI 304 stainless steel, ensuring corrosion resistance and long durability. The pump body is constructed from EN-GJL-200 cast iron. The AVBE type mechanical seal is designed with an unbalanced O-ring, suitable for pumping non-aggressive water.

The hydraulic connection is made via 1” internal Whitworth threads (Rp), facilitating installation in compact setups. The pump is driven by a 0.46 kW IEC IE2 three-phase motor, with forced ventilation and IP55 protection rating, allowing it to operate continuously and safely under demanding conditions.

Recommended Applications

• Pressure boosting in water installations
• Circulation in heating and cooling systems
• Compact air conditioning and pressurization equipment

Hydraulic Characteristics

• Nominal flow rate: 3.1 m³/h
• Nominal head: 27.68 m
• Operating speed: 2900 rpm
• Liquid temperature: -20°C to 90°C (60°C nominal)
• Maximum operating pressure: 10 bar (6 bar at 90°C)

Materials

• Impellers and shaft: Stainless steel EN 1.4301 / AISI 304
• Pump casing: Cast iron EN-GJL-200 / ASTM A48-25A
• Mechanical seal: AVBE (O-ring, unbalanced)

Electrical Data

• Nominal power (P2): 0.46 kW
• Voltage: 3 × 220-240D / 380-415Y V
• Frequency: 50 Hz
• Nominal current: 2.0–2.2 A / 1.0–1.2 A
• Efficiency class: IE2
• Nominal motor speed: 2770–2820 rpm
• Protection rating: IP55
• Insulation class: F

Installation and Dimensions

• Connection type: Rp 1” (inlet and outlet)
• Ambient temperature: -20°C to +55°C
• Mounting: Horizontal, on base
• Outlet position: 12

Additional Data

• Minimum Efficiency Index (MEI): 0.70
• Certifications: CE, EAC, UKCA
• Potable water approvals: ACS, NSF61
• Net weight: 11.6 kg | Gross weight: 14.1 kg
• Country of origin: Hungary

The Grundfos CM 3-4 A-R-A-E-AVBE is a reliable and compact multistage pump, ideal for circulation and pressurization systems in commercial applications. Its modular design, durable materials, and high-efficiency motor make this pump a safe and versatile choice for HVAC and water distribution projects.