CSV makes a rattle noise

[Rman]

I have a CSV installed now for 7years. I’ve noticed that there is a rattle noise when pump is running. Everything works properly. 3/4 hp 10Gpm pump set at 300 ft in 320 ft well 5ft static level produces 4GPM. One thing I noticed is the valve is installed up side down. Adjustment screw is down. Pressure switch 50 on to 65 off
Is there a way to disassemble the valve in place or better to remove valve first? No sediment in water just iron and hard water
Thanks

 

[Valveman]

It is not normal for a CSV to "rattle". Most likely the check valve if there is one close to the CSV.