Group D-SMT 250 DN 40 (1 1/2) with insulation, without pump, pump installation length 250mm 669052

Compact mixing and pumping unit for heating systems

The D-SMT 250 DN 40 (1 1/2”) unit is a ready-made solution for building constant-temperature heating circuits. It is a complete assembly that significantly simplifies installation and ensures efficient system operation. The unit's design is intended for easy integration with existing installations, and its compact dimensions allow for mounting even in limited spaces.

Construction and application

The unit consists of a number of key components that ensure optimal operating parameters. It includes steel connectors, a check valve, a strainer, a MIX M mixing valve, and two thermometers. Additional 1/2” female threads on the supply and return sides facilitate the connection of additional installation elements. The whole is protected with insulation, minimizing heat loss. It is designed to work with the SL 10 - 10Nm actuator (available separately), which enables automatic temperature regulation in the circuit.

Important note: The unit does not include shut-off valves – it is recommended to install standard ball valves on the installation side and DN 50 gate valves on the boiler side to ensure full control over the flow of heating medium.

Key features and benefits

• Ready-made solution: A complete pumping unit saves time and costs associated with selecting individual components.

• Compact design: Allows installation in tight spaces in boiler rooms or technical rooms.

• High quality workmanship: The use of durable materials guarantees reliable operation for a long time.

• Easy installation: Simple construction and clear markings make installation easy even for less experienced installers.

• System performance optimization: The MIX M mixing valve provides precise temperature regulation in the heating circuit, which translates into user comfort and energy savings.

• Versatility: Can be adapted to different types of boilers and heating installations thanks to various connection options (boiler side: DN 50 flange, installation side: GZ 1 1/2”).

• Safety: The strainer protects against impurities, and the check valve prevents backflow of the heating medium.

• Thermal insulation: Reduces heat loss and improves the energy efficiency of the system.

The center distance is 250 mm, and the maximum working pressure is 6 bar. The unit is designed to operate at temperatures up to 110°C, and the seals are made of VITON or EPDM. The boiler side connection is a DN 50 flange, while the installation side connection is GZ 1 1/2”. The pump installation length is 250 mm.

The D-SMT 250 DN 40 unit is a solid and functional solution for anyone looking for a reliable element for building an efficient constant-temperature heating system. Thanks to its versatility and ease of installation, it is ideal for both professional installers and end-users who care about comfort and energy savings in their homes.