Flamco - Flexfiller Midi 125D Pressurisation Unit - Single Pump - 230V - 2.5 bar

Designed to be compact and enclosed, the Flexfiller Midi pairs an electronic pressure transducer with a user-friendly microprocessor to maintain minimum system pressure with precision.

Wall-mounted top-up pressurisation unit, with a 4 Ltrs internal break tank, the unit delivers flow rates up to 12 L/min. It suits commercial, industrial and large domestic installations and is available in single or twin-pump configurations for sealed LPHW/CHW, refrigeration and process systems (guide volume up to 50,000 Ltrs).

• Digital control with electronic pressure transducer
• 4 Ltrs break tank; up to 12 L/min top-up
• MODBUS RTU integration; password-protected access
• Category 5 protection (AB weir overflow)

A compact white (RAL 9003) enclosure simplifies installation and commissioning, while diagnostics, logging and BMS-friendly comms streamline ongoing operation.

Real-world product applications

• Boosting water pressure to multiple outlets in a building
• Maintaining stable pressure where demand varies
• Supplying water from storage tanks to distribution pipework
• Supporting general water supply and transfer systems
• Assisting with pressure control in utility installations

Key Product Features

• Applications: commercial, industrial and residential sealed systems (up to 50,000 Ltrs guide)
• Protection: Fluid Protection Category 5 (Type AB weir overflow); system fill mode
• Controls: sequential programming menu; pressure setting in 0.1 Bar increments; pump pulse option
• Service: on-screen service reminder (12 months)
• Electrical: electric pump, 230V 50Hz 1ph
• Communications:MODBUS RTU protocol; password protection
• Flood protection: pump runtime limiter; excessive start alarm
• Event logging: alarms, pump run counter (per pump), cumulative run timer (hours/pump), electrical interruption
• Volt-free contacts: Common Alarm (N/C), High Pressure (N/O), Low Pressure (N/O), Sensor Health (N/O), Pump 1 Health (N/O), Pump 2 Health (N/O)
• Operating conditions: system temp 5–85 °C; ambient 5–40 °C; pressure rating PN 10; RH 95% non-condensing; noise < 75 dBA
• Finish: compact wall-mount enclosure, white (RAL 9003)
• Configurations: single (duty) or twin (duty/standby) pump options
• Operating pressure: 2.5 Bar.

Flamco (est. 1956) is a Dutch manufacturer of HVAC and plumbing system components, including expansion vessels, air separators and pressurisation accessories. Their ranges are used in heating and chilled-water circuits and potable water systems across domestic and commercial installations.