Mikrofill 3 PRO Pressurisation Unit with 25 Litre MikroPro Expansion Vessel Set - Service Valve Included

This set pairs the Mikrofill 3 PRO fully automatic pumpless pressurisation unit with a 25 litre MikroPro expansion vessel, giving specifiers, installers and facilities managers a complete, pre-matched pressurisation and expansion solution for domestic and commercial heating and cooling systems. The vessel is wall-mounted, and purchasing the products together as a set extends the standard warranty on the Mikrofill 3 PRO from 2 years to 4 years. The set is supplied with a service valve included as standard.

The Mikrofill 3 PRO is a WRAS-approved sealed system filling device that manages system pressure with minimal maintenance, combining patent-pending smart fault logic, measured fill volume, leak detection and MODBUS RTU connectivity in a compact, IP55-rated wall-mountable unit. The 25 litre MikroPro expansion vessel is wall-mounted and rated to a maximum operating pressure of 3 bar, constructed with a carbon steel shell, a synthetic rubber compound diaphragm and a durable powder epoxy coating.

• Supplied with a service valve included as standard
• Factory pre-commissioned units to reduce on-site installation and commissioning time
• Extended 4 year warranty on the Mikrofill 3 PRO when purchased as this vessel package
• 25 litre capacity, wall-mounted, matched to suit the intended system size
• Single-source compatibility between pressurisation unit and expansion vessel
• Suitable for sealed heating systems, chilled water circuits and closed-loop HVAC installations

Key Product Features

• Mikrofill 3 PRO (product code 72846): fully automatic, WRAS-approved pumpless pressurisation unit (WRAS approval number 2307805) with UKCA and CE conformity certification
• Maximum inlet pressure of 9 bar, maximum cold fill pressure of 8.7 bar and maximum operating pressure of 9 bar
• Maximum flow rate of 12 l/min
• Patent-pending smart fault logic, measured fill volume, leak detection and MODBUS RTU connectivity for building management system integration
• IP55-rated, compact wall-mountable design: 290 mm high to the bottom of connections (386 mm to the bottom of the tundish), 250 mm wide and 155 mm deep, weighing 5.3 kg without hoses
• 230 V/1 ph/50 Hz supply with a 3 A fuse rating and BMS relays rated to a 5 A maximum load
• 15 mm compression inlet and system connections with a 22 mm compression drain connection
• Ambient temperature range of 5–45°C, inlet water temperature range of 5–23°C and system water temperature range of 5–85°C
• Standard 2 year warranty on the Mikrofill 3 PRO, extended to 4 years with this vessel package
• 25 litre MikroPro expansion vessel, wall-mounted, rated to a maximum operating pressure of 3 bar and a maximum operating temperature of 70°C
• Vessel constructed with a carbon steel shell and carbon steel threaded connections, a synthetic rubber compound diaphragm, finished in a durable powder epoxy coating
• Vessel complies with the Pressure Equipment Directive (PED) 97/23/EC and carries CE certification