Question about air tank gauges

[bubblerboy64]

After complaining about the difficulty with the pressure relief valve on my apeks tank valve for months I ordered and received a valve from pyramid air. This unit has a screw valve release which should be much easier for me to operate. NOW a question. The glycerin filled gauge is much larger on the apeks valve and I'd prefer to have that on the new valve. Looks like it should be a simple screw off one and on to the the other deal. However there appears to be a drift pin on the one valve which concerns me.

Anyone know its function and can I safely unscrew the gauge with out damage to anything or should the the pin be driven out first. Any thoughts or should I just leave well enough alone. The apeks valve is probably of no value to anyone as it is so if I can use that gauge even it it's of only slight advantage why not. BUT I don't want to screw the pooch either.

 

[lenweber2]

If the thread is the same and it should be no problem,

 

[bubblerboy64]

What I am looking for is some one familiar with this valve who can tell me the purpose of that drift pin showing below the point where the gauge is threaded into the body of the valve. And then if it affects the removal of the gauge.

i do understand to work the thread size would have to be the same .

 

[John "spysir" Blount]

Fuzzy pic on my screen, that a pin? Looks almost like a blurry burst disc.



John

 

[bubblerboy64]

Yes it sure looks like a drift pin it goes threw to the other side of the valve body or there is another (what ever it is) on the other side. I'm all but certain it's a pin to retain something internal to the valve or is there to prevent that threaded fitting from being backed out.

i just don't want to attempt backing that fitting connecting the valve and the gauge out without knowing for sure what I'm doing. 

Clearly I could attempt to tap the pin or unscrew the fitting but I think I need to know what's what before I do ( and bugger something up)