Replacement fitting for heating oil fuel supply

[RDarbyshire]

View attachment 42552 I need to replace this fitting that is connected to the heating oil fuel supply to my boiler, can anyone recommend a supplier and also what what is this component known as, so that I order the correct part. TIA

 

[SJB060685]

That's a remote sensing fire valve. A phial hangs over the burner with a capillary tube running back to the valve, when the set temperature is sensed it automatically shuts the valve and cuts off fuel supply. I would fit a Teddington KBB 65°c but you need an oil engineer, you should not try this yourself.