Flamco Pro PU 231 Digital Pressurisation Unit – Twin Pump – 1–3 Bar

The Flamco Pro PU 231 Digital Pressurisation Unit provides intelligent pressure maintenance for sealed heating and chilled water systems in commercial and industrial buildings. It continuously monitors system pressure and automatically restores water whenever pressure drops below the programmed setting. As a result, boilers, pumps, heat exchangers, valves, and pipework remain protected while the entire heating or cooling system continues operating at optimum efficiency.

Designed for applications where reliability is essential, this floor-standing unit features two high-performance pumps operating in a duty/standby configuration. Furthermore, automatic pump alternation distributes operating hours evenly between both pumps, helping reduce wear while extending component life. If one pump becomes unavailable, the second pump automatically maintains system pressure, ensuring continuous operation with minimal disruption.

Intelligent Digital Pressure Control

The advanced digital controller continuously measures system pressure through an electronic pressure transducer and automatically manages filling operations. In addition, the clear LCD display provides real-time pressure readings, alarm notifications, operating status, and service reminders, allowing engineers to monitor system performance quickly and accurately.

Pressure settings can be adjusted in precise 0.1 Bar increments, giving installers greater flexibility during commissioning. Moreover, the controller records operating events and alarm history, making routine servicing easier and reducing troubleshooting time. Consequently, maintenance becomes more efficient while overall system reliability improves.

Twin Pump Reliability

The twin-pump configuration provides an additional level of operational security for critical HVAC installations. Likewise, automatic duty sharing ensures that both pumps operate evenly throughout their service life. This balanced operation reduces mechanical stress while improving long-term reliability.

The integrated 18-litre break tank supports safe water management and complies with modern water regulations. Furthermore, the durable powder-coated steel enclosure protects internal components against demanding plant room conditions, ensuring dependable operation throughout the year.

Advanced Safety Features

Safety remains a key feature of this digital pressurisation unit. Therefore, it incorporates dry-run protection, anti-seize pump protection, flood protection, intelligent runtime monitoring, and comprehensive event logging. These built-in safety systems help prevent unnecessary equipment damage while reducing ongoing maintenance costs.

In addition, the unit supports MODBUS RTU communication, allowing seamless integration with Building Management Systems (BMS). Password-protected programming also prevents unauthorised changes to operating parameters. As a result, facility managers benefit from greater control, improved monitoring, and enhanced operational security.

Ideal Applications

This pressurisation unit is ideal for hospitals, hotels, schools, office buildings, manufacturing facilities, district heating systems, apartment developments, and other commercial properties where uninterrupted pressure maintenance is essential. Moreover, the twin-pump arrangement delivers additional peace of mind for installations where continuous operation is critical.

Whether installed in a new project or replacing an existing pressure maintenance system, the Flamco Pro PU 231 Digital Pressurisation Unit offers dependable automatic pressure control, intelligent monitoring, and reliable twin-pump performance for demanding HVAC applications.

Browse our Flamco Pressurisation Units collection to discover additional pressure maintenance solutions for commercial heating and cooling systems.

Key Features

• Twin high-performance pumps
• Operating pressure: 1–3 Bar
• Maximum flow rate: 18 Ltr/min
• Automatic duty/standby pump operation
• Automatic pump alternation
• Digital microprocessor controller
• Electronic pressure transducer
• Automatic filling system
• Pressure adjustment in 0.1 Bar increments
• 18-litre integrated break tank
• Dry-run protection
• Anti-seize pump protection
• Flood protection
• Event logging
• MODBUS RTU communication
• Password-protected programming
• Volt-free alarm outputs
• Category 5 backflow protection
• WRAS-approved components

Benefits

• Maintains accurate system pressure automatically
• Provides continuous operation through twin-pump redundancy
• Extends pump life with automatic duty sharing
• Reduces manual maintenance requirements
• Improves energy efficiency
• Integrates with Building Management Systems
• Ideal for critical commercial HVAC installations