MIKROFILL

MIKROFILL MIDI 250

Digital Pressurisation Unit

MID-RANGE POWER WITH MAXIMUM PERFORMANCE

The Mikrofill MIDI is a versatile and high-performance pressurisation unit designed to maintain pressure in large domestic and commercial sealed systems, including heating systems, chilled water systems, refrigeration units, and industrial cooling systems. Featuring continuously rated brass peripheral pumps, the MIDI ensures reliable operation with minimal maintenance.

 

Thanks to its compact design, the Mikrofill MIDI can be wall or floor mounted, making it exceptionally easy to install and commission. With a cold fill pressure of up to 4.1 bar and an 8-litre tank capacity, the unit is built to meet the demands of systems up to 150,000 litres.

 

The advanced digital control system and automated fill and top-up functions guarantee precise pressure management. Its high flow, KIWA-approved fill valve and flexible connection options add to its ease of use and efficiency.

 

Designed for consistent performance and built for durability, the Mikrofill MIDI is the ideal solution for both heating and cooling applications, providing seamless pressure control with minimal maintenance.

Stuart Pressurisation Unit SPU 250 MIDI Stuart Pressurisation Unit SPU 250 MIDI
Stuart Pressurisation Unit SPU 250 MIDI
Stuart Pressurisation Unit SPU 250 MIDI
Key Features
  • Suitable for sealed systems of up to 150,000 litres
  • Twin (Duty-Standby) pump option
  • 4.1 bar cold fill pressure
Technical Specification
Product Code 46724
General
Warranty 2 years
Approvals CE
Features
System capacity Up to 150,000 litres
Mounting Wall or floor mount
Pump control system
Intelligent control interface
System fill mode
Dry run protection
Typical noise 62 dB(A)
Materials
Break tank Polyethylene
Front cover Acrylic capped ABS
Performance
Maximum fill pressure 4.1 bar / 410 kPa
Maximum flow 20 l/min
Maximum inlet pressure - tank fill valve 7 bar / 700 kPa
Maximum working pressure 6 bar
Ambient air temperature Min 4 oC / Max 40 oC
Relative humidity 95 % non-condensing
Min./Max water temperature Min 4 oC / Max 23 oC
Water tank
Usable water capacity 8 litres
Inlet valve and fill rate Torbeck (side entry)  12 l/min
Fluid category CAT 5 (type AB air gap with weir)
Connections
Cold water inlet 15 mm compression x 600 mm flexible hose
Cold water outlet 15 mm compression x 600 mm flexible hose
Overflow G ¾ (19 - 23 mm diameter pipe compression fitting)
Pump
Number of pumps 2
Pump mode Duty-standby
Pump type Peripheral
Motor type Induction, auto-reset thermal trip
Pump head and impeller Brass
Duty rating Continuous (S1)
Electrical
Power supply (Vac/Ph/Hz) 230 V a.c. / 1 / 50 Hz
Power consumption - P1 545 Watts
Current - full load 2.4 Amps
Fuse rating 5 Amps
Power cable length 1.5 metres (pre-wired)
Alarm output Multiple
Physical
Enclosure protection IPX4
Width 415 mm
Depth 270 mm
Height 504 mm
Weight - including fittings 19.4 Kg
Weight - filled 29.4 Kg
GTIN 13 DIGIT 5050400467243
Compare Models
Description Part Number Maximum fill pressure Number of pumps
MIKROFILL MIDI 135 46721 3.5 bar / 350 kPa 1
MIKROFILL MIDI 150 46723 4.1 bar / 410 kPa 1
MIKROFILL MIDI 235 46722 3.5 bar / 350 kPa 2
MIKROFILL MIDI 250 46724 4.1 bar / 410 kPa 2
Videos