Válvula mezcladora termostática suelo radiante ESBE serie VTA322 y VTA572 - Q-Tech ® 2026
Válvula mezcladora termostática suelo radiante ESBE serie VTA322 y VTA572 - Q-Tech ® 2026

ESBE VTA322 and VTA572 Series Thermostatic Mixing Valve for Underfloor Heating

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  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

The ESBE VTA322 and VTA572 Series Thermostatic Mixing Valves are the definitive solution for temperature control in underfloor heating circuits. Designed to provide safe and precise temperature mixing, these valves protect both the piping and the floor itself from unexpected temperature increases.

The VTA322 (for small systems) and VTA572 (for high flow rates) series offer high functionality and are the preferred choice for installers in heating and cooling applications.

✨ Protection and Precision: The ESBE Value for Underfloor Heating

Ensure the longevity and efficiency of your underfloor heating system with ESBE thermostatic valves.

  • Double Protection (Anti-Scald and Anti-Overload): Both series incorporate a vital safety function to prevent burns from excess heat in the line. Furthermore, it protects the pipes and the floor from damage caused by temperature spikes.

  • Specific Regulation for Underfloor Heating: The VTA572 Series offers an ideal range of 20 to 55°C, while the VTA322 operates from 20 to 43°C, guaranteeing comfort and the integrity of the installation.

  • High Flow Capacity: The VTA572 Series is optimized to handle High Flow, making it perfect for larger scale projects.

  • Versatility of Use: Suitable for both underfloor heating circuits and universal Domestic Hot Water (DHW) applications.

  • Simple and Precise Adjustment: VTA572 valves are equipped with a large adjustment knob that facilitates temperature manipulation.

⚙️ Specifications and Model Differentiation (E-E-A-T)

The choice between VTA322 and VTA572 depends on flow requirements and the maximum operating temperature.

VTA322 Series: Precise Control for Compact Systems

  • Primary Application: Universal DHW (with safety function) and small-scale underfloor heating circuits.

  • Adjustment Range: 20 to 43°C.

  • Available Connections (Product Codes):

    • 1/2" external thread (female) - Code 31102800

    • 3/4" external thread (female) - Code 31100500

    • 1" external thread (male) - Code 31100900

VTA572 Series: High Flow for Demanding Projects

  • Primary Application: Heating and cooling that require high flow rates. It protects the underfloor heating installation from unexpected high temperatures.

  • Adjustment Range: 20 to 55°C.

  • Additional Features: Large adjustment knob and cooling functionality (10-30°C) or radiators (30-70°C) with other versions of the series.

  • High Flow Connections (Product Codes):

    • 1" external thread (male) - Code 31702100

    • 1-1/4" external thread (male) - Code 31702200

📊 Common Technical Specifications and Media

Feature Technical Detail (VTA322/VTA572)
Safety Function Anti-scald (automatic shut-off upon cold water failure)
Design High flow and functionality
Compatible Media Fresh/potable water, Heating water, Closed systems
Antifreeze Glycol mixture equal to or less than 50%
Supply With top cover (unless otherwise indicated)

Do you need a mounting diagram or flow (Kvs) advice?

Precise selection is key in underfloor heating. Contact our Specialized Technical Support team for installers and professionals. We will help you correctly size the VTA322 or VTA572 Series for your project.

❓ Frequently Asked Questions (FAQ)

1. Which ESBE series should I choose for my underfloor heating?

If your circuit is small or standard-sized, the VTA322 Series (20-43°C) is suitable and efficient. If you need to handle a High Flow due to the size of the installation or require a slightly higher temperature range, the VTA572 Series (20-55°C) is the superior professional option.

2. Does the anti-scald safety function apply to underfloor heating?

Yes, in the context of underfloor heating, the safety function protects the piping system and the floor from accidental overheating. In the event of a malfunction that could spike the temperature, the valve cuts off the heat supply to prevent costly damage.

3. Is the VTA572 compatible with cooling applications?

Yes. Although the main model for underfloor heating has a range of 20-55°C, the VTA572 Series also includes versions with temperature ranges of 10-30°C, making it suitable for cooling circuits in the same floor or ceiling.

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