Diving Compressor Bristol 4s.7.40

[Rik Lemmens]

Hello, I'm new, I'm not a diver, but I'm not a paintball shooter either. I searched and found a high-pressure compressor, I collect historical combustion engines. One of these engines is a very early Diesel Engine, it needs 80 Bar of compressed air to blow in the fuel, which is why I purchased the diving compressor. It's an old Bristol 4S.7.40, an engineering marvel, I would like to treat this well, and above all not do anything wrong. The engine has a three-stage compressor, but I'm going to use that extra compressor as a backup Now comes my question: is there anyone who can help me with a manual for this compressor? Thank you in advance and best regards from the Netherlands Rik

 

[Brucie]

I have a Bristol 4S-7-40. Recently the oil cap has broken its threads. I was able to get the remainder out and now the cap just catches and holds on one thread, but I would like to replace with a new one. Are these still available or someone might have a second hand one lying about. Also, on the cap it says "FILL TO TOP" and unsure exactly where TOP is. Thanks
Bruce

 

[windyairman]

The oil must be up to the bottom of the thread.I fill til i cant get any more in,right up to the top.
Yes i have spare filler caps but i am not back to my workshop till september.
If you go to your local hydraulic shop they can get you a blank its BSP thread [think it 1"]
You must NOT use a vented blanking cap.

 

[Brucie]

The oil must be up to the bottom of the thread.I fill til i cant get any more in,right up to the top.
Yes i have spare filler caps but i am not back to my workshop till september.
If you go to your local hydraulic shop they can get you a blank its BSP thread [think it 1"]
You must NOT use a vented blanking cap.

Hi
OK. Got it. In that case my compressor was running with low oil. I could see clear oil in the hole but definitely not to the top. Nice to hear that the cap is available but will try your suggestion in getting a blank/end plug now that I know the size and thread type locally. Thanks

 

[benedittini]

Hy,
A friend of mine has a 4S 16 40 HP bristol compressor for dive. Do you confirm the meaning of this marking : 4S= four stages, 16= sixteen cubic foot per minute (450l/mn), 40= 4000 PSI (260 b)? Thank a lot

 

[windyairman]

Ben
4S16 40
4 Is 4 Stage

16 is Displacement CFM

Average charging rate is 11 CFM

40 Is Max working pressure 4000 PSI

Fly wheel is 17Inch and a 15 inch fan

4S16 50
Has a 20 inch fly wheel
18 inch fan

Also the after cooler may have more coils
& stronger fittings for 5000 PSI

I have parts & work shop manuals for 4s16 pumps

Also have new valves for first ,second & third stages.

Pm me if you want parts for these old pumps

 

[benedittini]

Ben
4S16 40
4 Is 4 Stage

16 is Displacement CFM

Average charging rate is 11 CFM

40 Is Max working pressure 4000 PSI

Fly wheel is 17Inch and a 15 inch fan

4S16 50
Has a 20 inch fly wheel
18 inch fan

Also the after cooler may have more coils
& stronger fittings for 5000 PSI

I have parts & work shop manuals for 4s16 pumps

Also have new valves for first ,second & third stages.

Pm me if you want parts for these old pumps

Hello Windyairman

Thanks a lot for your answer. My friend is looking for a frequency converter because he doesn't have 400v 3 phases power supply and must power the motor (7.5kw) with 240v single phase.
I will come back to you for more information (and perhaps spare parts ) in January.
Best regards,
Henri