2-way pump unit with electronic control for the constant temperature

2-way pump unit with electronic control for the constant temperature


The unit for 1” (180 mm) circulating pumps consists of:



  • Connection.
  • 3-way mixing valve with electronic servomotor.
  • Circulating pump with press-cable (for the models with it).
  • Flanged ball valve supplied with in-handle thermometer (coded red, range 0°C-120°C).
  • Temperature sensor



  • Flanged ball valve with non return valve 20 mbar (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (coded blue; 0°C-120°C).
  • “T” Connection for mixing valve.
  • Connection.


Centre distance 125 mm. EPP insulation box (Measurements: 250x380x190 mm).

PN 10. Max Temperature 110°C.

External connections: 1” or 1”1/4 Female.




For power up to 35 kW (with Δt 20 K) and maximum flow 1500 l/h.

Kvs Value: 6,0.

Approximate data calculated with a 6 m nominal lifting power circulating pump.

For an accurate measuring or for higher flows, please refer to the curves shown in the technical section.


                 Available circulating pumps:

                   Wilo Star RS 25/6 (W6)

                   Grundfos UPSO 25-65 (G60)

                   Wilo Star RSG 25/8 (RSG8)*




We suggest you to install two isolating valves Art. 552 (see Correlated Articles) before the pump unit to allow an easy service or replacement of the components of the unit.




Code 1”: 20355(R/L)-M3F-CT - with circ. pump: 20355(R/L)-M3F-(W6/G60/RSG8)-CT

Code 1”1/4: 20455(R/L)-M3F-CT- with circ. pump: 20455(R/L)-M3F-(W6/G60/RSG8)-CT



“R” Codes: pump units with right supply. f.i. 20355R-M3F-CT; “L”Codes: pump units with left supply. f.i. 20355L-M3F-CT.

(*) The pump units with circulating pump Wilo RSG 25/8 (RSG8/G8) are not reversible. They are available only with right supply way.

  • Model: M2 MIX3 FIX