What does the shop sell?

Spare parts for gas and oil burners and boilers: gas valves, nozzles, ignition electrodes and transformers, pressure switches, flame detectors, fuel pumps, servomotors and burner control boxes.

How large is the catalogue?

Over 100,000 part numbers from every major manufacturer, brought into one structure so that parts from different brands can be compared and replaced.

Can I find a part by its number?

Yes. The order number, the manufacturer model and any supplier code all lead to the same part, so a number from an old invoice or a nameplate is enough.

What if the part is discontinued?

The catalogue records what the manufacturer replaced it with, and which parts from other brands do the same job — together with the conditions that apply.

The company is based in London and ships across the United Kingdom, Europe and the rest of the world.

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The catalogue is being assembled now. The shop opens as soon as it is ready.

Kromschroder Stainless steel bellows unit EKO20RA 03262043

Key specifications

Nominal diameter (DN)	20 mm
Body material	stainless steel
connection_type	external thread R ¾"
Certification	DIN-DVGW
Length	173 mm
Ambient temperature, max	250 °C
maximum_working_pressure_air_water	10 bar
Ambient temperature, min	-20 °C
Maximum working pressure (gas)	4–5 bar
Construction type	multi-layer bellows

Nominal diameter (DN)

20 mm

Body material

stainless steel

connection_type

external thread R ¾"

Certification

DIN-DVGW

Length

173 mm

Ambient temperature, max

250 °C

maximum_working_pressure_air_water

10 bar

Ambient temperature, min

-20 °C

Maximum working pressure (gas)

4–5 bar

Construction type

multi-layer bellows

all specifications (10) ↓

Description

This stainless steel bellows unit is a burner housing part. It has a nominal diameter of 20 mm and a length of 173 mm. It is constructed as a multi-layer bellows from stainless steel. The connection is an external thread R ¾". It is certified to DIN-DVGW. The permissible ambient temperature range is -20 to +250 °C. The maximum working pressure is 10 bar for air or water and 4–5 bar for gas.

Choosing and fitting

Parts of this type are selected by comparing the connection size and type (external thread), nominal diameter, length, and pressure and temperature ratings with the existing installation. The connection must match the mating thread. During installation, ensure the bellows is not twisted, compressed beyond its allowable deflection, or installed under tension. Proper alignment is critical to avoid premature fatigue. Also verify that the material is compatible with the medium and that gaskets or seals are replaced as needed.

All specifications

Application	industrial gas burners, boiler rooms, gas pipelines, drying chambers, furnaces, process lines

Nominal diameter (DN)	20 mm
Body material	stainless steel
connection_type	external thread R ¾"
Certification	DIN-DVGW
Length	173 mm
Ambient temperature, max	250 °C
maximum_working_pressure_air_water	10 bar
Ambient temperature, min	-20 °C
Maximum working pressure (gas)	4–5 bar
Construction type	multi-layer bellows