What is the correct way to shut down a compressor?

[Bladebum]

Does anyone have the facts in what the correct way to shut down a compressor during a fill cycle?

Should you start bleeding air before you switch it off or can you just shut down and bleed off? Obviously bleeding while filling a tank is a problem as your hard earned air will start to escape while you frantically bleed, shut tank valve then turn off compressor. 

Obviously with guns having a check valve that is easy, but is it even neccessary for the longevity of the pump to run this procedure?

[Robert 5mm]

I only fill guns from a YH and I follow the U-Tube video that I 1st watched a few years ago.

1. Have both bleed valves open when turning on compressor.
2. Shut both bleed valves at same time and fill to pressure.
3. Open both bleed valves at same time, then turn off compressor.

I guess one could fix up a foster fitting ( check valve ) inline to the front end of an inline filter to work as a tank check valve.
But then you would have figure out a bleed valve on the filter and line.

[avator]

I just fill to desire pressure (tank or gun with non autostop compressor), shut the compressor off and close valve if filling a tank then bleed the pressure off the line.

If you think this is a bad way of doing it than please explain to me how it's done with an autostop compressor....
the compressor stops when it reaches it's preset goal. Then you bleed the line (or close the tank valve then bleed the line) and disconnect.

[sb327]

I just shut the compressor off then bleed…Yong heng…no issues to date…a couple years

Dave

[cosmic]

Auto stop, close tank then bleed compressor, I leave the cooling system on for a while also..

[bear air]

I shut the valve on my tank then bleed and shut off almost simultaneously. Seems to be working so far.

[Firewalker]

I have the auto-off function on my YH and a one way valve on the fill line.

It shuts itself off and I just open the bleed and degass valves and turn off the power.

Close the tank valve and open the bleed.

Done.

[PasadenaMike]

Don’t overthink it just shut it off

[huntr]

Don’t overthink it just shut it off

😁👍

[bear air]

+2

[Bladebum]

So there's been some great feedback in here that I appreciate. Really I have just heard that it was better for the compressor to be shut off under load. But like presented here by a some replys,  what about the auto shut offs on alot of compressors? What is the ACTUAL  damage caused?

I think going forward I will just be shutting down, closing tank valve and degassing.

[avator]

On water cooled compressors I'll leave the water pump on for a period of time after shutting the compressor down. Most have temp gauge that you can watch go down to a reasonable temp.
On dry compressors (fan cooled) I'll let the fans run after shut down.

[Firewalker]

Don’t overthink it just shut it off

+3

[TorqueMaster]

I only fill guns from a YH and I follow the U-Tube video that I 1st watched a few years ago.

1. Have both bleed valves open when turning on compressor.
2. Shut both bleed valves at same time and fill to pressure.
3. Open both bleed valves at same time, then turn off compressor.
...

The above is the same procedure I started using, maybe I saw the same video. 
Prior to that, I was just shutting down, then bleeding.

I think I was convinced that the high pressure piston seal was "happier" creating pulses of high pressure air, rather than having static high pressure sitting on it.  Since my first high pressure seal died an early death ( <1 hour total) for no observable reason, keeping it happy became high priority.  The new seal is probably getting close to an hour of use by now -- it is hard to keep track when guns fill in under a minute each time.