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Sinum Double | Wilo

Sinum Double

Constant pressure with continuous degassing and topping-up.

Your advantages
Wilo-Sinum pump D20 back

Constant pressure with continuous degassing and topping-up.

Wilo-Sinum is the ideal solution for pressurization, de-aeration and topping up in sealed heating installations where standard diaphragm expansion equipment is limited. The pressure expansion automat for pumps includes an integrated pressure retention, degassing and topping-up in enclosed heating and cooling systems. The large series of closed vessel sizes allows adaptation to a large number of applications for guaranteeing constant system pressure. The system offers continuous degassing using three selectable operation modes and thanks to the digital and analogue inputs, it can be optimally integrated into an existing building management system.

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Your advantages

  • Easy installation thanks to intuitive menu navigation in the HMI, large display and self-learning microprocessor
  • Different operating modes guarantee continuous degassing
  • Advanced technology ensures low power consumption, long service life and easy maintenance
  • High convenience through volumetric controls and automatic topping-up during the heating and cooling cycles
  • Modular design for a high level of installation flexibility
  • Optional: Integration in existing building management systems through digital and analogue outputs
  • Automatic change-over or load dependent operating mode for double pump unit
Series description


Pressure maintenance equipment.


  • Closed heating installations (acc. to EN 12828)
  • Chilled water (cooling) installations



Sinum Pump M10


Family name pression expansion equipment


With pump


Single pump control


Performance class

Technical data

  • Maximum system pressure: 6, 10 and 16 bar
  • Working temperature: 3 °C / 70 °C
  • Suitable for addition of glycol-based anti-freeze up to 50%
  • In accordance with Machinery Directive 2006/42/EC

Installation and operating instructions


Article Number 2200594
Edition 2021-12
Page format 209.9 x 297.0 mm
Number of pages 520
PDF (67 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)