DC water pump for solar thermal and underfloor heating circulation with 1.2 m³/h flow and 12-24V operation

This Jiatong JT-750 series DC water pump delivers efficient circulation for renewable energy and heating applications, specifically engineered for solar water heater systems and underfloor heating boosters. Operating on 12-24V DC power with consumption between 0.015-0.035 kW, it provides flexible installation options for off-grid solar setups or battery-powered applications. The pump's non-blocking design ensures reliable performance in closed-loop heating systems where consistent water movement is critical for heat transfer efficiency and temperature regulation throughout the property.

Technical Specifications and Performance

With measurable performance parameters designed for heating system applications, this DC pump offers predictable water movement capabilities suitable for residential and small commercial installations.

Flow Rate and Pressure Range

The pump delivers a flow rate of 1.2 cubic metres per hour with adjustable head pressure ranging from 3 to 7 metres, allowing system designers to match pump performance to specific installation requirements. This pressure range accommodates different system layouts and vertical lift requirements while maintaining efficient water circulation for optimal heat transfer in both solar thermal collectors and underfloor heating distribution networks.

Power Requirements and Efficiency

Operating on 12-24V DC power with consumption between 0.015-0.035 kW, this pump offers energy-efficient operation suitable for solar-powered installations where electricity consumption directly impacts system performance. The DC operation eliminates conversion losses associated with AC pumps in off-grid applications, while the low power requirement makes it compatible with smaller solar arrays and battery banks commonly used in residential renewable energy systems.

Physical Dimensions and Connections

Weighing just 0.18 kg with 20mm or 25mm threaded connections, the compact engineering plastic construction enables straightforward installation in confined spaces typical of heating system installations. Available in both 4-point and 5-point thread variants (JT-750B4, B5, D4, D5 models), the pump accommodates different piping standards and connection requirements found in solar thermal and underfloor heating installations across various regions and system designs.

Construction and Design Features

Engineered specifically for heating system applications, this pump incorporates design elements that address common challenges in water circulation for thermal transfer applications.

Material Selection and Durability

The engineering plastic construction provides corrosion resistance essential for heating system applications where water treatment chemicals and varying pH levels can affect component longevity. This material choice combined with the pump's lightweight design (0.18 kg) simplifies installation and reduces structural support requirements compared to metal-bodied alternatives, while maintaining compatibility with clean water media as specified for the non-blocking impeller design.

Impeller Design and Performance

Featuring a semi-open impeller configuration with six impellers operating on a single-stage jet pump principle, this design prioritises consistent water movement over extreme pressure generation. The non-blocking characteristic ensures reliable operation in systems where small debris or air bubbles might temporarily affect flow, while the horizontal shaft orientation provides predictable performance alignment with standard piping layouts found in solar thermal and underfloor heating installations.

Electrical Configuration and Safety

The DC operation with specified 12V or 24V requirements (with corresponding 2A power supply recommendations for dry running conditions) provides inherent low-voltage safety advantages in wet environments. This electrical design eliminates concerns about high-voltage AC exposure near water systems while offering compatibility with standard renewable energy system components, including charge controllers, battery banks, and solar panel outputs commonly used in off-grid and grid-tied solar thermal installations.

Application and Installation Considerations

Designed specifically for thermal system applications, this pump addresses the particular requirements of water circulation in heat transfer scenarios with practical installation considerations.

Solar Thermal System Integration

In solar water heater applications, the pump's DC operation allows direct connection to photovoltaic panels or battery banks without power inversion, improving overall system efficiency. The 1.2 m³/h flow rate matches typical requirements for residential solar thermal collectors, while the adjustable 3-7 metre head accommodates vertical lift between roof-mounted collectors and ground-level storage tanks commonly found in solar hot water installations.

Underfloor Heating Booster Function

For underfloor heating systems requiring additional circulation beyond primary heat source pumps, this unit provides dedicated boosting capability with appropriate flow characteristics for distributed heating networks. The non-blocking design proves particularly valuable in underfloor installations where air entrapment during system filling or maintenance can temporarily affect pump performance, ensuring reliable operation throughout heating seasons.

System Compatibility and Selection

With both 20mm and 25mm threaded connection options available in four distinct model variants (JT-750B4, B5, D4, D5), installers can match the pump to existing system pipework without adapters. The clear specification of clean water only usage ensures appropriate application matching, while the engineering plastic construction maintains compatibility with common heating system additives and treatment chemicals used to prevent scaling and corrosion in closed-loop thermal applications.