In-line Pump TPD 50-60/2 A-F-A-BQQE-DW1

The double inline pump Grundfos TPD 50-60/2 A-F-A-BQQE-DW1 (ref. 98957979) is a robust and efficient solution for climate control applications in commercial buildings, specifically designed for heating, ventilation, and air conditioning systems that require reliable water circulation in closed circuits.

This dry rotor pump is equipped with two parallel motor heads and a common volute casing with inline suction and discharge ports, allowing for direct connection via DN 50 flanges according to DIN PN 6/10 standard. Thanks to its top pull-out design, it is possible to disassemble the motor, head, and impeller for maintenance tasks without needing to dismantle the pipe casing, facilitating quick and efficient interventions.

Each motor head is equipped with an unbalanced rubber bellows mechanical seal, type BQQE, which meets the requirements of the EN 12756 standard. The system ensures reliable sealing, even under demanding pressure and temperature conditions. The pump body is made of grey cast iron EN-GJL-250 (equivalent to ASTM class 35), while the impeller is made of stainless steel AISI 304 (EN 1.4301), ensuring corrosion resistance and durability against continuous water flow.

This pump offers a nominal flow rate of 16.2 m³/h and a nominal head of 4.39 m, with a real impeller diameter of 74 mm. It operates optimally with liquids between -25 °C and 120 °C, and withstands a working pressure of up to 10 bar across its thermal range. It is ideal for hot or cold water applications in HVAC systems.

Regarding motorization, each head incorporates a fan-cooled asynchronous motor of type 71A, with a nominal power of 0.37 kW. It is a 2-pole motor, energy efficiency class IE3, with an efficiency of 73.8% at full load and a rotational speed between 2850 and 2880 rpm. It supports three-phase supply voltages of 3 x 220-240D / 380-415Y V, with a network frequency of 50 Hz.

The motor has a cos φ between 0.80 and 0.70, a nominal current of 1.74/1.00 A, and a protection rating of IP55, ensuring resistance to dust and water jets. The insulation class is F according to IEC 85, and it can operate in environments with ambient temperatures from -30 °C to 60 °C. Its installation is carried out with a port-to-port length of 280 mm, and it is equipped with motor flanges FT85.

Summary of Technical Features

• Double inline pump with dry rotor and parallel heads
• Nominal flow rate: 16.2 m³/h · Head: 4.39 m · Impeller: 74 mm
• Liquid temperature: -25 °C to 120 °C · Max pressure: 10 bar
• Body material: EN-GJL-250 cast iron · Impeller: AISI 304
• DIN DN 50 flange connection · PN 6/10 · Standards EN 1092-2 / ISO 7005-2
• IE3 asynchronous motor · 0.37 kW · 2850-2880 rpm · 2 poles
• Supply: 3 x 220-240D / 380-415Y V · 50 Hz
• Current: 1.74/1.00 A · Cos φ: 0.80 - 0.70
• Protection rating IP55 · Insulation class F
• Port-to-port dimensions: 280 mm · Motor flange size: FT85
• Net weight: 45.1 kg · Gross weight: 56.8 kg

The Grundfos TPD 50-60/2 A-F-A-BQQE-DW1 is a high-performance pump designed to offer operational reliability, easy maintenance, and energy efficiency in demanding HVAC systems.