# Safety valve DANFOSS 6422571 DN20, spring-loaded overpressure relief valve, DN20 connection

**URL:** https://aio.lv/en/product--danfoss-6422571--12009736
**Data updated:** 2026-03-12 16:31 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** DANFOSS
**Manufacturer code:** 6422571
**EAN:** 4772013324683
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 41.73 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--danfoss-6422571--12009736

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

DANFOSS safety valve model 6422571 is a spring-loaded overpressure relief device with DN20 connection. It is designed to protect pressure systems by opening at a specified set pressure to release excess media and prevent damage. Typical applications include heating, hot water and industrial pressure systems where reliable pressure relief and system safety are required.

## Long description

DANFOSS 6422571 is a spring-loaded safety valve with a DN20 connection designed to protect pressurised systems by releasing excess pressure at a preset setpoint. Intended for heating, hot water and industrial pressure systems, the valve ensures controlled pressure relief to avoid component damage and maintain operational safety. The compact DN20 fitting and spring mechanism provide reliable operation across typical installation conditions.
Advantages
The spring-loaded design delivers consistent opening behaviour at the set pressure and ensures quick response to overpressure events. A DN20 connection allows compatibility with standard pipework and fittings used in domestic and light industrial systems. Constructed with materials suitable for media commonly found in heating and hot water systems, the valve offers corrosion resistance and stable performance under repeated cycles.
Suitable for
Residential and commercial heating systems
Hot water supply installations
Closed-loop industrial pressure systems requiring overpressure protection
Piping and equipment with DN20 connections
Key specifications
Valve type: spring-loaded overpressure relief valve
Connection size: DN20
Function: opens at preset overpressure to release excess media
Application: suitable for steam-free liquid and gaseous media common in heating and hot water systems
Operating principle: mechanical spring actuation for predictable opening
How to use
Install the safety valve on the pressure vessel or pipeline at a location recommended by system designers, ensuring the DN20 connection matches the existing piping. Set and verify the opening pressure according to system requirements and applicable standards before commissioning. Ensure correct orientation and provide adequate discharge piping if required by local regulations to safely convey released media away from personnel and equipment. Regular inspection and maintenance should be performed to confirm free movement of the spring mechanism and absence of blockages.
Usage recommendations
Verify compatibility of the valve materials with the system media and operating temperatures. Follow applicable codes and manufacturer guidance for setting, installation torque and discharge arrangements. Schedule periodic functional tests and visual inspections to ensure reliable performance and replace the valve if signs of corrosion, leakage or mechanical wear are observed.

## FAQ

### How much does the DANFOSS safety valve 6422571 DN20 cost, and is it available for purchase?

The price is 50.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 23 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All DANFOSS products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized DANFOSS service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12009736/67492667_large.webp