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Stuart Pressurisation Unit SPU 230 MINI

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Digital Pressurisation Unit

Suitable for maintaining pressure in large domestic and small commercial sealed heating systems, chilled water systems, refrigeration units and industrial cooling systems. STUART SPU MINI units are exceptionally easy to install and commission and are housed in a compact and robust enclosure suitable for wall mounting.


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BIM-OBJECT 2 Year Warranty UKCA-CE
Stuart Pressurisation Unit SPU 230 MINI
Key Features
  • Suitable for sealed systems of up to 6,000 litres
  • Twin (Duty-Standby) pump option
  • 3.0 bar cold fill pressure
Technical Specification
Product Code 46720
Warranty 2 years
Approvals UKCE / CA
System capacity Up to 6,000 litres
Mounting Wall mount
Pump control system
Intelligent control interface
System fill mode -
Dry run protection
Typical noise 60 dB(A)
Break tank Polyethylene
Front cover Acrylic capped ABS
Maximum fill pressure 3.0 bar / 300 kPa
Maximum flow 1 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 2 litres
Inlet valve and fill rate Torbeck (side entry)   12 l/min
Fluid category CAT 5 (type AB air gap with weir)
Cold water inlet G ½ M
Cold water outlet 15 mm compression x 600 mm flexible hose
Overflow G ¾ (19 - 23 mm diameter pipe compression fitting)
Number of pumps 2
Pump mode Duty-standby
Pump type Piston
Motor type Solenoid
Duty rating (unit) Continuous (S1)
Pump head and seal PA66 / POM    NBR
Power supply (Vac/Ph/Hz) 230 V a.c. / 1 / 50 Hz
Power consumption - P1 100 Watts
Current - full load 0.5 Amps
Fuse rating 5 Amps
Power cable length 1.5 metres (pre-wired)
Alarm output Single
Enclosure protection IPX4
Width 293 mm
Depth 145 mm
Height 403 mm
Weight - including fittings 4.2 Kg
Weight - filled 7.2 Kg
GTIN 13 DIGIT 5050400467205
Compare Models
Description Part Number Maximum fill pressure Number of pumps
Stuart Pressurisation Unit SPU 130 MINI 46719 3.0 bar / 300 kPa 1
Stuart Pressurisation Unit SPU 230 MINI 46720 3.0 bar / 300 kPa 2