Thermostatic mixing valve


  • Left or right connection to the UFH manifold
  • High kvs value
  • Easy setting of the temperature via knob
  • Compact design

The VTG140 series are 4-way thermostatic valves dedicated for heating applications with focus on underfloor heating. The special design of the valve allows mirroring the connection to the manifold in an easy way and eliminates the need for additional connection components. The temperature range 20-55°C is convenient for underfloor heating from the start-up of the system to its normal working conditions.

Product range

VTG141, Internal and external thread

VTG140_Top_B-03.png Reference Temp. range [⁰C] Kvs Connection E Connection F A [mm] B [mm] C [mm] D [mm] Weight [kg]
31810100 VTG141 20 - 55 3,4 Rp ¾" G 1" 84 46 max. 60 70 0,75
Installation support

Installation examples

Installation examples
Thermostatic regulated underfloor heating with one zone.
3-way connection


Technical data

Technical data

Pressure class: PN 10
Working pressure: 1,0 MPa
max. Differential pressure, Mixing: 0,1 MPa
Temperature stability: ±3 °C * Valid at unchanged cold/return water pressure, minimum flow rate 9 l/min. Minimum temperature difference between cold water inlet and mixed water outlet 3°C and recommended maximum temperature difference between return water and mixed water outlet: 10°C.
Media temperature, continuosly max.: +95 °C
Media temperature, temporarily max.: +100 °C
Media temperature, min.: 0 °C
Connection, Internal thread (Rp): EN 10226-1
Connections, External thread (G): ISO 228/1
Material, Valve housing and other metal parts with fluid contact: Dezincification resistant brass, DZR
Surface treatment: Nickel-plated


PED 2014/68/EU, article 4.3 /
SI 2016 No. 1105 (UK)


Please see data sheet
Accessories and spare parts

Spare parts

Art No. Reference Designation Note Instruction manual
37001700 37001700 VTA937 ESBE VTA937 Exchange kit VTA370, 20 - 55°C VTA370 download
Download area

Download area

Type Preview Download
Data Sheet VTG140 download
Installation instruction VTG140 download
Certificate Declaration of Conformity, VTG140 download
Certificate Declaration of Conformity UKCA, VTG140 download
Certificate Building Product Declaration BPD3, VTG140 download
Certificate EAC certificate (RU), VTG140 download
Image VTG141, high res download
2D Image VTG141 download
3D drawing (stp file) VTG141, Rp¾" + G1" download


Thermostatic regulated underfloor heating with one zone.