Thermostatic mixing valve

VTA320, VTA520

  • Anti-scald and anti-legionella protection.
  • Accuracy of regulation.
  • Suitable for HWC (hot water circulation).
The series VTA320/VTA520 for domestic hot water distribution, anti-scalded tempering in line applications and where further temperature control devices have been installed at the water taps. These series of valves are also suitable for domestic hot water installations equipped with HWC (hot water circulation).
Product range

VTA321, Internal thread

Art.no. Reference Temp. range [⁰C] Kvs Connection E A [mm] B [mm] C [mm] D [mm] Weight [kg] Note
31100300 VTA321 20 - 43 1,5 Rp ½" 70 42 52 46 0,45 Replaces 472L.
31100700 VTA321 20 - 43 1,6 Rp ¾" 70 42 52 46 0,48 Replaces 474L.
31100400 VTA321 35 - 60 1,5 Rp ½" 70 42 52 46 0,45 Replaces 406
31100800 VTA321 35 - 60 1,6 Rp ¾" 70 42 52 46 0,48 Replaces 407

VTA322/VTA522, External thread

Art.no. Reference Temp. range [⁰C] Kvs Connection E A [mm] B [mm] C [mm] D [mm] Weight [kg] Note
31102800 VTA322 20 - 43 1,2 G ½" 70 42 52 46 0,41 Replaces 410L.
31100500 VTA322 20 - 43 1,5 G ¾" 70 42 52 46 0,45 Replaces 471L.
31100900 VTA322 20 - 43 1,6 G 1" 70 42 52 46 0,48 Replaces 475L.
31620100 VTA522 20 - 43 3,2 G 1" 84 62 60 56 0,86 Replaces 31301600.
31620400 VTA522 20 - 43 3,5 G 1¼" 84 62 60 56 0,95
31103200 VTA322 30 - 70 1,6 G 1" 70 42 52 46 0,53
31102900 VTA322 35 - 60 1,2 G ½" 70 42 52 46 0,41
31100600 VTA322 35 - 60 1,5 G ¾" 70 42 52 46 0,45 Replaces 471
31101000 VTA322 35 - 60 1,6 G 1" 70 42 52 46 0,48 Replaces 475
31104700 VTA322 45 - 65 1,6 G 1" 70 42 52 46 0,55
31620200 VTA522 45 - 65 3,2 G 1" 84 62 60 56 0,86 Replaces 31301200.
31620500 VTA522 45 - 65 3,5 G 1¼" 84 62 60 56 0,95
31620300 VTA522 50 - 75 3,2 G 1" 84 62 60 56 0,86
31620600 VTA522 50 - 75 3,5 G 1¼" 84 62 60 56 0,95

VTA323, Compression fitting

Art.no. Reference Temp. range [⁰C] Kvs Connection E A [mm] B [mm] C [mm] D [mm] Weight [kg] Note
31102600 VTA323 20 - 43 1,2 CPF 15 mm 86 50 52 46 0,49 A non-return valve for the cold water is included. Replaces 401L.
31100100 VTA323 20 - 43 1,5 CPF 22 mm 86 50 52 46 0,57 A non-return valve for the cold water is included. Replaces 470L
31102700 VTA323 35 - 60 1,2 CPF 15 mm 86 50 52 46 0,49 A non-return valve for the cold water is included.
31103900 VTA323 35 - 60 1,5 CPF 18 mm 86 50 52 46 0,66
31100200 VTA323 35 - 60 1,5 CPF 22 mm 86 50 52 46 0,57 A non-return valve for the cold water is included. Replaces 470.

VTA522/VTA523, with adapters

Art.no. Reference Temp. range [⁰C] Kvs Connection F A [mm] B [mm] C [mm] D [mm] Weight [kg] Note
31620700 VTA522 20 - 43 3,0 R ¾" 154 97 60 56 1,22 Two check valves for both hot and cold water are included.
31621000 VTA522 20 - 43 3,4 R 1" 164 102 60 56 1,59 Two check valves for both hot and cold water are included.
31621600 VTA523 20 - 43 3,4 CPF 28 mm 204 122 60 56 1,90 Two check valves for both hot and cold water are included. Replaces 31300700, 476L.
31620800 VTA522 45 - 65 3,0 R ¾" 154 97 60 56 1,22 Two check valves for both hot and cold water are included.
31621400 VTA523 45 - 65 3,0 CPF 22 mm 180 110 60 56 1,42 Two check valves for both hot and cold water are included.
31621100 VTA522 45 - 65 3,4 R 1" 164 102 60 56 1,59 Two check valves for both hot and cold water are included.
31621700 VTA523 45 - 65 3,4 CPF 28 mm 204 122 60 56 1,90 Two check valves for both hot and cold water are included. Replaces 31300100, 476, 416.
31620900 VTA522 50 - 75 3,0 R ¾" 154 97 60 56 1,22 Two check valves for both hot and cold water are included.
31621200 VTA522 50 - 75 3,4 R 1" 164 102 60 56 1,59 Two check valves for both hot and cold water are included.
Installation support

Operation

Operation
VTA320
VTA520

Installation examples

Installation examples
VTA520/VTA320
VTA520
Technical data

Technical data

Pressure class: PN 10
Working pressure: 1,0 MPa
max. Differential pressure, Mixing: 0,3 MPa
Temperature stability: VTA320: ±2 °C*;
VTA520: ±4 °C**;
* Valid at unchanged hot/cold water pressure, minimum flow rate 4 l/min. Minimum temperature difference between hot water inlet and mixed water outlet 10°C. ** Valid at unchanged hot/cold water pressure, minimum flow rate 9 l/min. Minimum temperature difference between hot water inlet and mixed water outlet 10°C.
Conformity:

PED 2015/68/EU, article 4.3

Media temperature, max.: +95 °C
Media temperature VTA520, temporarily max.: +100 °C
Connections, Internal thread (Rp): EN 10226-1
Connections, External thread (G): ISO 228/1
Connections, External thread (R): EN 10226-1
Connections, Compression fitting (CPF): EN 1254-2
Material, valve housing and other metal parts with fluid contact: Dezincification resistant brass, DZR

Conformity

Conformity
HCACL/4MS UBAList
KTW/WRAS/ACS

Dimensioning

Dimensioning
Please see data sheet
Accessories and Spare Parts

Spare parts

Art No. Reference Designation Note Data sheet Instruction manual
37000500 37000500 VTA932 ESBE VTA932 Exchange kit VTA320, 20 - 43°C VTA320 download download
37000400 37000400 VTA932 ESBE VTA932 Exchange kit VTA320, 35 - 60°C VTA320, VTR320 download download
37001300 37001300 VTA932 ESBE VTA932 Exchange kit VTA320, 30 - 70°C VTA320 download download
37100100 37100100 VTA952 ESBE VTA952 Exchange kit series VTA520, 20 - 43°C VTA520 download download
37100200 37100200 VTA952 ESBE VTA952 Exchange kit series VTA520, 45 - 65°C VTA520, VTR520 download download
37100300 37100300 VTA952 ESBE VTA952 Exchange kit series VTA520, 50 - 75°C VTA520, VTR520 download download
98080480 98080480 VTA903 ESBE VTA903 Adjusting knob, series VTA300 download download
98080420 98080420 VTA903 ESBE VTA903 Top knob, series VTA300 download download

Connection kit KTD200, KTD300

Art No. Reference Designation Note Data sheet Instruction manual
36552200 36552200 KTD212 Connection kit with external thread R ¾" for use on externally threaded valves G 1". One check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. download download
36552400 36552400 KTD312 Connection kit with external thread R ¾" for use on externally threaded valves G 1". Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. download download
36552300 36552300 KTD212 Connection kit with external thread R 1" for use on externally threaded valves G 1¼". One check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. download download
36552500 36552500 KTD312 Connection kit with external thread R 1" for use on externally threaded valves G 1¼". Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. download download

Connection kit KCD300

Art No. Reference Designation Note Data sheet Instruction manual
36552900 36552900 KCD313 Connection kit with compression fittings CPF 22mm for use on externally threaded valves G1". Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. download download
Download area

Download area

Type Preview Download
Data Sheet VTA320, VTA520 download
Installation instruction VTA320 download
Installation Instruction VTA520 download
Certificate Declaration of Conformity VTA320, VTA520 download
Certificates Building Product Declaration BPD3, VTA320 download
Certificates Building Product Declaration BPD3, VTA520 download
Certificate KIWA-21-DW-10120, VTA320 download
Certificate KIWA-21-DW-10122, VTA520 download
Certificate EAC certificate (RU) download
Approval PZH-certificate (PL) download
Image VTA321, high res download
Image VTA322, high res download
Image VTA323, high res download
Image VTA522, high res download
Image VTA522 with adapters, high res download
Image VTA523 with adapters, high res download
2D Image VTA520 download
2D Image VTA522, VTA523 with adapters download
3D drawing (stp file) VTA321 Rp ½" download
3D drawing (stp file) VTA321 Rp ¾" download
3D drawing (stp file) VTA322 G ¾" download
3D drawing (stp file) VTA322 G 1" download
3D drawing (stp file) VTA323 CPF 22mm download
3D drawing (stp file) VTA522 G 1" download
3D drawing (stp file) VTA522 G 1¼" download
3D drawing (stp file) VTA522 R ¾" download
3D drawing (stp file) VTA522 R 1" download
3D drawing (stp file) VTA523 CPF 22mm download
Applications

Applications

Domestic hot water control and termostatic under floor heating control in systems with district heating.

Heat pump with heating circuit and domestic hot water tank.

Domestic hot water with both in-line and point-of-use regulation.

Solar system with maximum use of the stratification in the storage tank.

Complete solid fuel application with domestic hot water and solar system.

Domestic hot water control in substations for district heating.

Domestic hot water control and regulation of under floor heating for systems with district heating.

Circulation unit with mixing valve together with controller for district heating systems.

Heat pump with high flow requirements.

Circulation unit with mixing valve together with controller for district heating systems.

Domestic hot water system with asymmetrical flow.

Solar system with additional backup for domestic hot water system.