This is Atlas Copco part number 1615766786, which also shows up as 1615766782 valve regulator, stocked at Crowder Supply as AC-1615766786. This part controls the working cycle of the tool. When its faces wear, the tool sounds different and the blow rate falls off usually the first thing checked on a slow machine.

If you are working from a machine rather than a part number, start at the parts diagram hub, or send us the model and serial and we will match it. Machines themselves are on the Atlas Copco tool range. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.

• Part number: 1615766786
• Also listed as: 1615766782
• Manufacturer: Atlas Copco
• Crowder SKU: AC-1615766786