Mikrofill 3 PRO Pressurisation Unit with 2 x 400 Litre MikroPro Expansion Vessels Set - Service Valve Included

This set pairs the Mikrofill 3 PRO fully automatic pumpless pressurisation unit with two 400 litre MikroPro expansion vessels (800 litres combined capacity), giving specifiers, installers and facilities managers a complete, pre-matched pressurisation and expansion solution for domestic and commercial heating and cooling systems. The vessels are floor-standing, 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. Each 400 litre vessel is floor-standing and rated to a maximum operating pressure of 6 bar, and splitting the 800 litre requirement across two smaller vessels can suit installations where floor space, doorway access or plant room layout make a single larger vessel impractical.

• 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
• 2 x 400 litre vessels (800 litres combined capacity), floor-standing, suited to installations with restricted space for a single larger vessel
• Single-source compatibility between pressurisation unit and expansion vessels
• 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
• 2 x 400 litre MikroPro expansion vessels (800 litres combined capacity), floor-standing, each rated to a maximum operating pressure of 6 bar and a maximum operating temperature of 70°C
• Each vessel features a carbon steel shell, carbon steel threaded connections, a synthetic rubber compound diaphragm and a durable powder epoxy coating
• Each vessel complies with the Pressure Equipment Directive (PED) 97/23/EC and carries CE certification