Compressor>SCBA Tank fill question

[peaceful_ruler]

I understand that it is important with the Yong Heng compressor to start and stop with both ventilation and pressure valves OPEN. The problem that arises when filling my SCBA is that there are a few seconds between closing the tank valve and opening the compressor pressure valve that the pressure on the compressor spikes dangerously high because the air has no outlet.

Is there a quarter turn valve that can be installed in line somewhere to reduce that amount of time? Am I missing something?

 

[peaceful_ruler]

Disregard, because after I used my head just a little bit I realized that all I’m missing for the fill tank is a one-way or check valve. PCP’s already have those…

 

[Chickenthief]

And in the end what if you lost a gallon or two of air opening the bleed valve before closing the bottle valve!?

 

[steve-l]

This is the reason the better compressors also have mechanical blow off valves as well as auto shutoff switches.

 

[Geezerhood]

This is the reason the better compressors also have mechanical blow off valves as well as auto shutoff switches.

You can get a Yong Heng with an auto shutoff as well as a mechanical blow off valve. Though, I personally would never rely on an auto shutoff alone, always monitoring pressure and ready to shut it down. I know there are those who dislike the YH, but I would rate it as the best compressor out there for the money. I would love to have a $2500 to $6000 compressor but for now the YH is working great and I have an extra $2300 $5800 to spend on airguns and pellets.

I understand that it is important with the Yong Heng compressor to start and stop with both ventilation and pressure valves OPEN. The problem that arises when filling my SCBA is that there are a few seconds between closing the tank valve and opening the compressor pressure valve that the pressure on the compressor spikes dangerously high because the air has no outlet.

Is there a quarter turn valve that can be installed in line somewhere to reduce that amount of time? Am I missing something?

Edited original reply...didn't quite catch the original post clearly.

I am pretty sure It is OK to turn off the Yong Heng without opening the bleed valve. Every compressor own and I have looked at with auto shutoff, including the Yong Heng does exactly that.

STARTING it with the bleed valve closed, even more so if it is under pressure, is a whole 'nother thing and needs to be avoided. I watch the gauge and shut off the power switch on the YH as soon as it hits the intended pressure. Then I close the valve on the tank and bleed the air out of the lines. I keep the extra cooling fan running and the water pump, until the head temperature is down to where it was before I started. I have never seen a pressure spike doing that and it is not stressing the compressor like trying to start one under pressure, since the pistons simply stop moving with no force being applied to them from the motor.

I am planning on adding a one way valve with a bleeder on both sides at the tank eventually so a pressure break won't empty my entire tank.

 

[Ezana4CE]

@peaceful_ruler I was wondering a similar after seeing the device in the link below. I asked some Yong Heng owners what they thought and they say it isn’t necessary. As an owner maybe something in this thread will make sense to you.

Attention Yong Heng Owners: Does This Valve Look Useful to You?

This valve is has been designed to keep high pressure air flowing out of and away from your pump. I assume that it comes in handy once you turn off the pump. The description says it’s good to prevent pressure from flowing back into your compressor. I don’t have YH, but I read enough threads that...

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