Hydrovane Compressor Noise

Recently brought a used Hydrovane PU23. Is it normal for these to make a boiling/bubbling noise like a kettle once they are switched off? Haven't quite got around to understanding how these compressors work, to know if this noise is normal?
Don’t know a huge amount about compressors but I would firstly wh3n you stop the compressor open a tap and dump all the air, if the boiling bubbling noise stops investigate air side. But more likely water in engine cooling is the culprit so very slowly and cautiously check radiator cap, do not burn yourself if engine is likely to be at operating temperature


South Norfolk
On my Hydrovane that's an engine powered one, the instructions are to not release pressure when shutting down

I can hear something on the pump side while the pressure gradually reduces.

Is your oil level correct in the pump ?

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AHDB planting and variety survey

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The AHDB Planting and Variety Survey provides the earliest view of the planted area for the upcoming harvest in the United Kingdom (UK).​

Complete the Planting and Variety Survey

The survey will estimate the area of cereals and oilseed rape intended for harvest in 2022 in the UK. It aims to assess the varietal composition of wheat, barley, oats and oilseed rape crops in the UK. The results of this survey will allow the industry to quantify domestic production, at a time when food security is more important than ever.
The information can be used to shape the domestic market and trade and assist levy payers in their marketing decisions. It will detail regional differences of cropping across the UK, which will help...