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Atlas Copco 2901000500 is the service kit for the minimum pressure (pressure maintaining) valve, with the spring, piston seal, O-rings and lock washers. It is used on Atlas Copco rotary screw air compressors. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one complete set. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Minimum Pressure Valve Kit |
| Replaces | Atlas Copco 2901000500 |
| Contents | Valve spring, piston seal, O-rings and serrated lock washers, as in the original kit |
| Use | Rebuilds the minimum pressure valve on the separator tank outlet |
| Condition | New, aftermarket |
| Stat. HS-Code | 848490 |
| Atlas Copco Part No.(SPM Part No.) |
|---|
| 2901000500(SPM-ACP-2751) |
Scheduled valve service
Atlas Copco service plans rebuild the minimum pressure valve at the major service intervals. A kit on the shelf means it is done at the planned stop.
Oil carry over at start up
A valve that opens too early leaves the separator without back pressure, sending oil downstream. New seals and spring restore the opening pressure.
Air blowing back at stop
When the check function leaks, air from the network flows back into the tank at stop. The new seals cure it.
Fitting tips
Vent the compressor fully, note the order of the parts as you strip the valve, clean the bore and piston, and lubricate the new O-rings with compressor oil.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (3 aftermarket sellers) | USD 55.75 to 62.00 | 6 Oct 2026 |
| FridayParts | USD 90.59 | 9 Oct 2026 |
| Buy Machinery Parts | USD 108.71 | 7 Oct 2026 |
| Spare Part Mart | USD 44.60 | Today |
Our price of USD 44.60 is 20% to 59% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Atlas Copco 2901000500. It is not made by or affiliated with Atlas Copco; the Atlas Copco part number is used only to show what it replaces.
It fits machines that take Atlas Copco 2901000500. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
Prices depend on your ZIP or postcode.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
