Pumping group with mixing valve and actuator ESBE GRF121 VRG432-25 + ARA661 61241100

Pumping unit with mixing valve – an effective solution for your heating system

The ESBE GRF121 VRG432-25 + ARA661 pumping unit is a comprehensive solution for heating circuits where precise temperature and flow control are crucial. The device combines a high-performance pump, a reliable mixing valve and an intuitive actuator, ensuring optimal operating conditions for the installation. It is an ideal choice for both professional installers and users looking for an efficient and easy-to-use solution.

Design and application

The GRF121 pumping unit is designed to work with pumps with a standard length of 180 mm, which provides a great freedom in choosing components. It is equipped with a 3-way mixing valve with a progressive characteristic, minimizing the risk of its oversizing and ensuring precise control regardless of the flow rate. In addition, the device has two shut-off valves with thermometers, a check valve and high-quality EPP thermal insulation, minimizing heat loss. Thanks to this, the pumping unit works perfectly in underfloor heating systems, radiator heating and installations using renewable energy sources.

Advantages and benefits

• Precise control: The VRG432 mixing valve ensures accurate maintenance of the set temperature in the heating circuit.
• Versatility: The ability to control manually, with the ARA661 actuator or an external controller provides flexibility in adapting to individual installation needs.
• High efficiency: A high-efficiency pump (compliant with EC 547/2012 and EC 641/2009) ensures efficient circulation of the heating medium.
• Backflow protection: The check valve protects the installation against unwanted flow of the medium.
• Easy installation and maintenance: The compact design and intuitive connections facilitate installation and maintenance of the device.
• Glycol compatibility: The possibility of using in installations with glycol (up to 50% concentration) expands the scope of application of the pumping unit.
• Solid construction: The use of brass and steel in the fittings guarantees durability and corrosion resistance.
• Expandability: The device can be expanded with additional elements such as a manifold, which increases the functionality of the heating system.

Additional information: the pumping unit has a thermometer with a reading range of 0-120°C and is adapted to work with a maximum operating pressure of 10 bar. The connections on the primary side are a tapered external gas thread BSPP, and on the secondary side a tapered internal gas thread BSPP-G (ISO 228-1).