# Expansion Vessel Reflex S 50, 10 bar / 120°C, grey

**URL:** https://aio.lv/en/product--reflex-8209500--12101987
**Data updated:** 2026-03-17 20:27 (EET)
**Category:** Other goods
**Manufacturer:** Reflex
**Manufacturer code:** 8209500
**EAN:** 4036705110375
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Reflex S 50 expansion (diaphragm) vessel designed for heating and hot-water systems, rated for 10 bar maximum pressure and up to 120°C temperature. The grey diaphragm vessel provides pressure compensation and protects system components from overpressure and thermal expansion. Suitable for domestic and small commercial installations requiring corrosion-resistant, sealed expansion capacity.

## Long description

The Reflex S 50 expansion vessel is a diaphragm-type pressure vessel designed for heating and hot-water systems. Rated for a maximum operating pressure of 10 bar and temperatures up to 120°C, this grey Reflex S 50 unit provides sealed expansion capacity to accommodate thermal expansion and prevent overpressure in sealed systems. The compact design is intended for domestic and small commercial installations where corrosion resistance and reliable pressure compensation are required.
Advantages
The Reflex S 50 offers stable pressure compensation through a pre-charged diaphragm that separates the system water from the gas cushion, reducing oxygen ingress and corrosion risk. Its construction supports continuous operation at temperatures up to 120°C and a maximum working pressure of 10 bar, ensuring compatibility with most central heating and hot-water circuits. The grey finish and compact footprint simplify installation in plant rooms and boiler cabinets, while the sealed design reduces maintenance compared with open expansion systems.
Suitable for
Domestic central heating systems
Small commercial heating and hot-water installations
Sealed closed-loop hydronic circuits requiring pressure compensation
Retrofit projects replacing corroded or undersized expansion vessels
Key specifications
Type: Diaphragm (membrane) expansion vessel
Nominal volume: 50 litres
Maximum operating pressure: 10 bar
Maximum temperature: 120°C
Colour: Grey
Application: Heating and hot-water sealed systems
How to use
Mount the Reflex S 50 expansion vessel according to local codes and the heating system manufacturer’s guidance. Connect the vessel to the system at a suitable point in the return or feed line where pressure fluctuations can be absorbed. Pre-charge the gas side to the recommended pressure for the system, taking into account static height and system fill pressure. Verify tightness of connections and check the pre-charge periodically; adjust as necessary to maintain correct system pressure and to ensure the diaphragm operates within its designed range.
Usage recommendations
For optimal performance, match the vessel volume and pre-charge pressure to the system’s calculated expansion volume and static pressure. Inspect the vessel periodically for signs of external damage and confirm pre-charge pressure when the system is depressurised. Do not exceed the specified maximum temperature and pressure ratings of 120°C and 10 bar. Installation and servicing should be performed by qualified personnel familiar with hydronic systems and applicable safety regulations.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 Reflex 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 Reflex 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

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