VTA351, Internal thread VTA352, External thread VTA352, External thread and integrated check valves VTA353, Compression fitting VTA552, External thread VTA552, With adapters - external thread VTA553, With adapters - compression fitting
VTA351, Internal thread VTA352, External thread VTA352, External thread and integrated check valves VTA353, Compression fitting VTA552, External thread VTA552, With adapters - external thread VTA553, With adapters - compression fitting

Thermostatic mixing valve

VTA350, VTA550

The series VTA350/VTA550 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).
  • Anti-scald and anti-legionella protection.
  • Accuracy of regulation.
  • Suitable for HWC (hot water circulation).

Product range

VTA550 front_A-01
VTA550 side_A-01
VTA350 CV front_A-01
VTA352 with integrated check valves
VTA350 CV side_A-01
VTA550 koppel front_A-01
VTA552, VTA553 with adapters
VTA550 koppel side_A-01
Series VTA351, Internal thread
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmF mmWeight kgNoteNTCNTC = National Trade Code
31104900VTA35135-601.6Rp 3/4"70425246 0.48  
Series VTA352/VTA552, External thread
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmF mmWeight kgNoteNTCNTC = National Trade Code
31660100VTA55220-433.2G 1"84506056 0.78  
31660400VTA55220-433.5G 1 1/4"84506056 0.87  
31105000VTA35235-601.5G 3/4"70425246 0.45  
31105100VTA35235-601.6G 1"70425246 0.48  
31660200VTA55245-653.2G 1"84506056 0.78  
31660500VTA55245-653.5G 1 1/4"84506056 0.87  
31660300VTA55250-753.2G 1"84506056 0.78  
31660600VTA55250-753.5G 1 1/4"84506056 0.87  
Series VTA352, External thread and integrated check valves
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmF mmWeight kgNoteNTCNTC = National Trade Code
31106100VTA352 CV35-601.5G 1"70425246740.48Two checkvalves for both hot and cold water are integrated 
Series VTA353, Compression fitting
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmF mmWeight kgNoteNTCNTC = National Trade Code
31105200VTA35335-601.5CPF 22 mm70425246 0.57  
Series VTA552/VTA553, with adapters
Art.no.ReferenceTemperature range °CKvs** Kvs-value in m3/h at a pressure drop of 1 bar.ConnectionA mmB mmC mmD mmF mmWeight kgNoteNTCNTC = National Trade Code
31660700VTA55220-433.0R ¾"154856056 1.14Two check valves for both hot and cold water are included. 
31661300VTA55320-433.0CPF 22 mm180986056 1.34Two check valves for both hot and cold water are included. 
31661000VTA55220-433.4R 1"164906056 1.51Two check valves for both hot and cold water are included. 
31660800VTA55245-653.0R ¾"154856056 1.14Two check valves for both hot and cold water are included. 
31661400VTA55345-653.0CPF 22 mm180986056 1.34Two check valves for both hot and cold water are included. 
31661100VTA55245-653.4R 1"164906056 1.51Two check valves for both hot and cold water are included. 
31660900VTA55250-753.0R ¾"154856056 1.14Two check valves for both hot and cold water are included. 
31661500VTA55350-753.0CPF 22 mm180986056 1.34Two check valves for both hot and cold water are included. 
31661200VTA55250-753.4R 1"164906056 1.51Two check valves for both hot and cold water are included. 

Installation support

Operation
VTA350 VTA360_GB_A-01
VTA350
VTA550 VTS550_GB_A-01
VTA550
Installation examples
VTA350_VTA550-01
Installation instruction VTA350
Installation instruction VTA550

Technical data

Suitable application area
Recommended
  • Potable water, in line
Secondary alternative
  • Floor heating
  • 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, VTA350, VTA550: 95 °C
VTA550 temporarily: 100 °C
Temperature stability VTA350: ± 2 °C
VTA550: ± 4 °C
Connection, Internal thread (Rp): EN 10226-1 
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 VT350_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

VTA936

Exchange kit VTA936, 35 - 60°C.
37000800VTA936Exchange kit, 35 - 60°C   

VTA903

Top knob VTA903, series VTA300.
98080420VTA903Top knob, series VTA300    

VTA903

Adjusting knob VTA903, series VTA300.
98080480VTA903Adjusting knob, series VTA300    

VTA955

Exchange kit VTA955, series VTA550, 20 - 43°C.
37100400VTA955Exchange kit series VTA550, 20 - 43°C   

VTA955

Exchange kit VTA955, series VTA550, 45 - 65°C.
37100500VTA955Exchange kit series VTA550, 45 - 65°C   

VTA955

Exchange kit VTA955, series VTA550, 50 - 75°C.
37100600VTA955Exchange kit series VTA550, 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 VTA350, VTA550
Installation instruction VTA350
Installation Instruction VTA550
2D Image VTA550
3D drawing (stp file) VTA352 G ¾"
3D drawing (stp file) VTA352 CV G 1"
3D drawing (stp file) VTA552 G 1"
3D drawing (stp file) VTA552 R ¾"

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The series VTA330/VTA530 for domestic hot water distribution, anti-scalded point-of-use applications.
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Prod_VTR300_verB_issueA_lr
External thread

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VTS550

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Quick Links