VTS520, External thread VTS522, With adapters - external thread VTS523, With adapters - compression fitting
VTS520, External thread VTS522, With adapters - external thread VTS523, With adapters - compression fitting

Thermostatic mixing valve

VTS520

The series VTS520 for domestic hot water distribution connected to solar heating systems, where the high water temperatures require extra durable components. VTS520 has asymmetrical flow pattern. These series of valves are also suitable for domestic hot water installations equipped with HWC (hot water circulation).
  • High temperature resilience.
  • Anti-scald and anti-legionella protection.
  • Accuracy of regulation.
  • Suitable for HWC (hot water circulation).

Product range

VTA520 front_A-01
VTS522
VTA520 side_A-01
VTA520 koppel front_A-01
VTS522, VTS523 with adapters
VTA520 koppel side_A-01
Series VTS522, External thread
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmWeight kgNoteNTCNTC = National Trade Code
31720100VTS52245-653.2G 1"846260560.86  
31720300VTS52245-653.5G 1 1/4"846260560.95  
31720200VTS52250-753.2G 1"846260560.86  
31720400VTS52250-753.5G 1 1/4"846260560.95  
Series VTS522/VTS523, with adapters
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmWeight kgNoteNTCNTC = National Trade Code
31720500VTS52245-653.0R ¾"1549760561.22Two check valves for both hot and cold water are included. 
31720900VTS52345-653.0CPF 22 mm18011060561.42Two check valves for both hot and cold water are included. 
31720700VTS52245-653.4R 1"16410260561.59Two check valves for both hot and cold water are included. 
31721100VTS52345-653.4CPF 28 mm20412260561.90Two check valves for both hot and cold water are included. 
31720600VTS52250-753.0R ¾"1549760561.22Two check valves for both hot and cold water are included. 
31721000VTS52350-753.0CPF 22 mm18011060561.42Two check valves for both hot and cold water are included. 
31720800VTS52250-753.4R 1"16410260561.59Two check valves for both hot and cold water are included. 
31721200VTS52350-753.4CPF 28 mm20412260561.90Two check valves for both hot and cold water are included. 

Installation support

Operation
VTA520 VTS520_GB_A-01
VTS520
Installation examples
VTA520_VTS520-01
VTS520
Installation instruction VTS520

Technical data

Suitable application area
Recommended
  • Potable water, in line
  • Solar heating
Secondary alternative
  • Radiator heating
Technical data
Pressure class: PN 10 
Working pressure: 1.0 MPa
Max. differential pressure, Mixing: 0.3 MPa
Capacity diagram: see product catalogue 
Max. media temperature, continuosly: 110 °C
temporarily: 120 °C
Temperature stability: ±4 °C
Connection, External thread (G): ISO 228/1 
External thread (R): EN 10226-1 
Compression fitting (CPF): EN 1254-2 
Material, Valve housing and other metal parts with fluid contact: Dezincification resistant brass, DZR 
Conformity PED 2014/68/EU, article 4.3 
Valves are designed for VTS520_550
Conformity Low Lead_100x128_utgA-01
HCACL/4MS UBAList
KTW/WRAS/ACS

Accessories and spare parts

Connection kits
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual

KCD313

Connection kit with compression fittings for use on externally threaded valves.
36552800KCD313Valve thread G ¾" - Connection CPF 15mm Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KCD313

Connection kit with compression fittings for use on externally threaded valves.
36553100KCD313Valve thread G ¾" - Connection CPF 15mm Two check valves included. Nickel-plated. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KCD313

Connection kit with compression fittings for use on externally threaded valves.
36552900KCD313Valve thread G1" - Connection CPF 22mm Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KCD313

Connection kit with compression fittings for use on externally threaded valves.
36553200KCD313Valve thread G1" - Connection CPF 22mm Two check valves included. Nickel-plated. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KCD313

Connection kit with compression fittings for use on externally threaded valves.
36553000KCD313Valve thread G 1¼" - Connection CPF 28mm Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KCD313

Connection kit with compression fittings for use on externally threaded valves.
36553300KCD313Valve thread G 1¼" - Connection CPF 28mm Two check valves included. Nickel-plated. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312.  

KSD314

Connection kit with solder connection for use on externally threaded valves.
36553400KSD314Valve thread G1" - Connection 22mm Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KTD212

Connection kit with external thread for use on externally threaded valves.
36552200KTD212Valve thread G 1" - Connection thread R ¾" One check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KTD312

Connection kit with external thread for use on externally threaded valves.
36552400KTD312Valve thread G 1" - Connection thread R ¾" Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KTD312

Connection kit with external thread for use on externally threaded valves.
36552600KTD312Valve thread G 1" - Connection thread R ¾" Two check valves included. Nickel-plated. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KTD212

Connection kit with external thread for use on externally threaded valves.
36552300KTD212Valve thread G 1¼" - Connection thread R 1" One check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KTD312

Connection kit with external thread for use on externally threaded valves.
36552500KTD312Valve thread G 1¼" - Connection thread R 1" Two check valves included. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 

KTD312

Connection kit with external thread for use on externally threaded valves.
36552700KTD312Valve thread G 1¼" - Connection thread R 1" Two check valves included. Nickel-plated. Suits series VTS522, VTS552, VTA331, VTA532, VTA362, VTA562, VTA322, VTA522, VTA352, VTA552, VTA372, VTA572, VMC312. 
Spare parts
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual

VTS952

Exchange kit VTS952, series VTS520, 45 - 65°C.
37120100VTS952Exchange kit series VTS520, 45 - 65°C   

VTS952

Exchange kit VTS952, series VTS520, 50 - 75°C.
37120200VTS952Exchange kit, series VTS520, 50 - 75°C   

Download area

Find here direct related product information for download. If you don’t find your specific need here please look further into below mentioned "Quick links" or this website's “Search” and “Support” area.
Data Sheet VTS520, VTS550
Installation instruction VTS520
2D Image VTS520

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VTA332 External thread

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