Pumping group GRA311 with mixing valve and ESBE ARA661+VRG438-DN20 actuator with Wilo PARA STG 15/8 pump 61043600

Pump group for precise temperature regulation

The ESBE GRA311 pump group is a comprehensive solution for heating circuits where accurate flow and medium temperature control are crucial. The device combines mixing, pumping and protection functions, ensuring optimal operating conditions for the installation. Equipped with high-class insulation, it protects against heat loss and minimizes the risk of condensation. Its compact design facilitates installation even in limited boiler room spaces.

Construction and application

The GRA311 group is designed to work with various types of heating systems, including underfloor heating. It consists of: two-way shut-off valves with thermometers, a check valve to prevent backflow of the medium, a high-performance Wilo PARA STG 15/8 circulating pump and a 3-way mixing valve with ARA661 actuator. The progressive characteristic of the mixing valve ensures smooth and precise temperature control regardless of the flow rate. The device is adapted to work with glycol, which expands its range of applications.

Key advantages and features

• Precise regulation: The mixing valve with a progressive characteristic ensures accurate maintenance of the set temperature in the heating circuit.
• High efficiency: The Wilo PARA STG 15/8 pump is characterized by high energy efficiency, which translates into lower operating costs.
• Versatility: Possibility of use with various types of controllers available on the market and compatibility with glycol increase the flexibility of the installation.
• Compact size: Dimensions of 190 x 301 x 154 mm allow for installation in tight boiler room spaces.
• Solid construction: The use of brass in the fittings and steel in the pipes guarantees durability and corrosion resistance.
• Safety: The check valve protects the installation against backflow of the medium, and the maximum working pressure is 10 bar.
• Easy installation: Thanks to threaded connections with a diameter of 1 inch (25) on the primary side and 3/4 inch (20) on the secondary side, the installation of the pump group is simple and quick.
• Wide temperature range: The device can operate with a medium temperature from 5 to 100°C, making it suitable for various heating applications.
• Expandability: The pump group can be expanded with a manifold, allowing for the creation of more complex heating systems.

The ESBE GRA311 pump group is a reliable and efficient solution for professionals and end-users looking for optimal thermal comfort and low operating costs of the heating system.