Sime
Sime Air Diaphragm 6028641
Sime air diaphragm, 28mm diameter, for use in a range of Sime gas boilers.
At a glance
- Part type: air diaphragm
- Also known as 2042268
£2.81
£2.34 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Sime air diaphragm is a 28mm diameter diaphragm used within the air circuit of compatible Sime gas boilers. It is manufactured by Sime and listed under part number 6028641 as a gas boiler spare. The diaphragm responds to pressure changes in the air sensing path, allowing the boiler to detect airflow conditions correctly.
Signs this part needs replacing
- Boiler fails to fire or locks out during an air proving sequence
- Intermittent ignition faults that clear on reset but return
- Visible splits, cracking, hardening or distortion of the diaphragm material
- Loss of pressure signal at the air switch or sensing point
- Air-related fault codes logged on the boiler controls
Before you order
- Confirm the boiler model and serial number against the fit list above
- Check the existing diaphragm diameter measures 28mm before ordering
- Inspect the diaphragm seating and any associated air pipework for damage
- Verify the part number 6028641 matches the number on the failed component
Compliance
| Alternative numbers | 2042268 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME DEWY ZIP BF 25 SOLAR MET - 8101215 | — | — | — | |
| SIME FORMAT DEWY ZIP 25 BF GPL - 8101201 | — | — | — | |
| SIME FORMAT DEWY ZIP 25 BF MET - 8101200 | — | — | — | |
| SIME FORMAT SYSTEM 25 HE - 8101250 | 41-719-17 | 41-719-17 | — | — |
| SIME MURELLE EV HE 12 T - 8109161 | 41-283-19 | 41-283-19 | — | — |
| SIME MURELLE EV HE 12T MET - 8109150 | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
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