Grundfos - TPD 125-400/4 A-F-A-BQQE-RX3 Inline Twin Head Circulator Pump - 725v - Three Phase - Cast Iron

Single-stage, close-coupled, volute twin-head pump unit with in-line suction and discharge ports of identical diameter. The twin-head pump is designed with two parallel power-heads. The pump is of the top-pull-out design, i.e. the power head (motor, pump head and impeller) can be removed for maintenance or service while the pump housing remains in the pipework. Each power head is fitted with an unbalanced rubber bellows seal. The shaft seal is according to EN 12756. All pipework connection is via PN 16 DIN flanges (EN 1092-2 and ISO 7005-2). Each power head is fitted with a fan-cooled asynchronous motor of identical size.

Suitable for: Commercial air conditioning

Real-world product applications

• Circulating water around closed-loop pipework systems
• Maintaining flow through distribution circuits
• Supporting recirculation in building services installations
• Keeping consistent flow through equipment or pipe runs
• Assisting with loop circulation for system efficiency

Key Product Features

• Net weight: 914 kg
• Mains frequency: 50 Hz
• Rated Head: 35.4 m
• Max Head: 400 dm
• Rated Flow: 177 m³/h
• Product Voltage: 3 x 380-420D/660-725Y V
• Temperature Liquid Range: -25 .. 120 °C
• Pumped Liquid: Water
• Port to Port Length: 800 mm
• Connection Size: DN 125
• Type of connection: DIN
• Maximum Operating Pressure: 16 bar
• Impeller Material: Cast Iron
• Pump Housing Material: Cast Iron

This is a Grundfos Circulator pump which can be used within closed loop cooling, heating and hot water systems.

Grundfos (est. 1945) is a Danish pump manufacturer known for high-efficiency circulators, multistage boosters, borehole and wastewater pumps, plus packaged pressure systems. The range covers HVAC circulation, domestic hot water recirculation, pressure boosting, industrial water transfer and public water management, with strong focus on energy efficiency and intelligent controls.