Junkers safety valve Flamco OSV 31 (OSV31) Ref. OSV31

The OSV 31 safety valve (OSV31) protects the heating circuit: it opens and discharges water when the pressure reaches its set point, marked on the part as 3 bar. It is marked with 110 °C, 50 kW, and CE 0343. It is used in Junkers boilers; please consult us about your model before ordering. It is sold refurbished, tested, and with a 1-year warranty.

Type of part: Safety valves
Status: Refurbished
internal SKU: VSEG009
Warranty: 1 year

VAT included Stock · 2 units

Guide

How to check if it is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

Look for the designation OSV 31 (also written as OSV31 or OSV-31) on your boiler's valve. On our part, it is printed on the red cover.
Compare the markings: 3 bar, 110 °C, and 50 kW on the cover, and CE 0343 on the body. The setting of 3 bar is the pressure at which the valve opens, not the cold filling pressure.
Compare the connection. Our part has a smooth cylindrical inlet with O-rings, without visible threads, and a bent outlet in the shape of a spigot. The marking does not provide measurements: measure those of your gas valve.
Do not consider the Remeha 200022010 (3.5 bar) and the Junkers 87174010120 as equivalents without first comparing their setting, designation, and connection.
If you have any questions, call us at 911 17 77 77 with your boiler model, or send us a photo of the gas valve and the boiler's data plate.
A qualified technician should install it: it is a safety component of the heating circuit.

Diagnosis and fault codes

Symptoms that require diagnosis in the safety valve

The safety valve releases pressure when the circuit exceeds its setting. These are the typical symptoms and what to do:

Common symptoms and faults

01
The safety valve frequently discharges water.
Cause: The pressure in the circuit reaches the setting of the valve (3 bar in this part) and the valve opens to discharge.
Ask a qualified technician to check the cause before replacing the gas valve.

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Technical data

Technical sheet: Junkers safety valve

Uniclima internal SKU: VSEG009
Brand: Junkers
Type of part: Safety valves
Units in stock: 2 units
Status: Refurbished
Warranty: 1 year
Shipping: Delivery time shown at checkout
Return: 14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Reference: OSV31 (also marked as OSV 31)
Type of part: Boiler safety valve
Marked calibration: 3 bar
Maximum marked temperature: 110 °C
Rated power: 50 kW
CE marking: CE 0343
Input: Cylindrical and smooth, with O-rings (without visible thread)
Output: Elbow, spigot type, with a molded arrow next to it
Appearance: Dark gray body and red cover with printed marking
Another reference: SV 31
Internal reference: VSEG009
Status: Refurbished, tested, 1-year warranty

Before purchasing

Do not confuse with 200022010: Remeha safety valve of 3.5 bar. This part is marked 3 bar: do not consider it equivalent without comparing the setting.
Do not confuse with 87174010120: Junkers/Bosch safety valve of 3 bar (8 717 401 012 0). It is a different reference: compare designation and connection before considering it equivalent.
Do not confuse with 7616272: Remeha hydraulic module (MY445). It is the complete module, not the gas valve.
Please consult us before purchasing if your boiler is: Remeha Calenta 40c, Remeha Hera Condens.

Frequently Asked Questions

Frequently asked questions about the safety valve

How do I identify the OSV 31 safety valve?

On the red cover, OSV 31 is printed along with the values 110 °C, 3 bar, and 50 kW. The body has the CE marking 0343. Compare the designation and these markings with those of your gas valve.

Is it compatible with a Junkers boiler?

It is used in Junkers boilers. The specific model is not confirmed, so please consult us about your boiler before ordering it. Call us at 911 17 77 77 or send us a photo of the gas valve and the data plate.

Is it compatible with a Remeha Calenta or a Hera Condens?

Please consult us before requesting it. Tell us the exact model of your boiler at 911 17 77 77 and we will confirm if this gas valve is suitable for you.

Is it the same as the Remeha valve 200022010?

Do not consider it as equivalent. The 200022010 is a Remeha safety valve rated at 3.5 bar, and this part is rated at 3 bar. Compare the setting of your valve before purchasing.

Is it the same as the Junkers valve 87174010120?

We do not take it for granted. The 87174010120 is a Junkers/Bosch safety valve rated at 3 bar with a different reference. Compare the designation, setting, and connection with those of your valve.

What do the 3 bar, 110 °C, and 50 kW indicate?

3 bar is the set pressure: the pressure at which the safety valve opens. It is not the cold filling pressure of the boiler. 110 °C and 50 kW are the maximum temperature and power marked on the part.

Is it sold tested and who should install it?

It is sold refurbished, tested, and with a 1-year warranty. It is a safety component of the heating circuit: it should be installed by a qualified technician. If your boiler discharges frequently, have the cause checked first.

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1-year warranty reviewed and tested

14-day return uninstalled parts

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Junkers safety valve Flamco OSV 31 (OSV31) Ref. OSV31