Mikrofill Pressurisation Unit SPU 235 MIDI

MIKROFILL

MIKROFILL MIDI 235

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.

Key Features

Suitable for sealed systems of up to 150,000 litres

Twin (Duty-Standby) pump option

3.5 bar cold fill pressure

Resources & Downloads

Mikrofill MIDI Operation & Maintenance Manual

Mikrofill MIDI Data Sheet

Technical Specification

Product Code	46722
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	60 dB(A)
Materials
Break tank	Polyethylene
Front cover	Acrylic capped ABS
Performance
Maximum fill pressure	3.5 bar / 350 kPa
Maximum flow	17 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
Duty rating	Continuous (S1)
Pump head and impeller	Brass
Electrical
Power supply (Vac/Ph/Hz)	230 V a.c. / 1 / 50 Hz
Power consumption - P1	380 Watts
Current - full load	1.7 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	5050400467229

Compare Models

Description	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