The Atlas Copco OSV/CV Kit C111 (Part Number: 2901201800) is an essential maintenance component for oil-injected screw compressors. Designed and manufactured in Belgium, this kit ensures optimal oil separation, reliable pressure retention, and efficient compressor operation. As an authorized distributor, Seadweer supplies 100% original Atlas Copco parts to help engineers maintain the highest level of equipment performance.

Contents
Product Description
The OSV/CV Kit C111 includes a complete set of oil stop valve and check valve components, ensuring stable oil flow regulation and preventing backflow during shutdown. Built with high-precision parts and premium sealing materials, it maintains compressor reliability even under demanding industrial environments. This kit offers up to 35% longer service life compared to standard aftermarket alternatives, guaranteeing over 99% sealing efficiency and consistent air purity.
Regular replacement of the OSV/CV Kit helps maintain optimal oil flow and pressure balance, reducing energy losses and extending the overall lifespan of the air compressor system.

Product Information
| Specification | Value |
| Part Name | OSV/CV KIT C111 |
| Part Number | 2901201800 |
| Origin | Belgium |
| Tariff Code | 84819000 |
| Weight | 674 g |
| Width | 115 mm |
| Height | 65 mm |
| Length | 130 mm |

Components List
| Description | Quantity |
| SPRING CHECK VALVE | 1 |
| O-RING 32.15X3.53 | 1 |
| O-RING 85X3 | 1 |
| O-RING 12.3X2.4 | 1 |
| O-RING 69.5X3 | 1 |
| PLUG G 3/8 YELLOW | 1 |
| PLUG G 1/4 A | 1 |
| O-RING | 1 |
| CHECK VALVE C111-C106 | 1 |
| INSTR. OSV/CV C111 | 1 |
| SPRING OIL STOP VALVE | 1 |
| O-RING 59.5 X 3 | 2 |
| O-RING 19.2X3 | 1 |
| VALVE OIL STOP | 1 |
| O-RING 32.2X3 | 2 |
| PISTON | 1 |
| O-RING 15.1X1.6 | 4 |
| PLUG G 1 A | 1 |
| PLUG G 1/2 | 1 |

Key Advantages
- Enhanced Durability: The kit provides up to 35% longer service life compared to conventional replacements, reducing maintenance frequency.
- Superior Sealing: Equipped with high-quality O-rings, it achieves over 99% sealing efficiency, preventing leakage and maintaining stable oil pressure.
- Improved Energy Efficiency: The optimized valve design contributes to up to 10% lower energy consumption during compressor operation.
- Reliable Performance: Each component is precision-engineered to maintain compressor integrity and smooth functionality in all conditions.
- Easy Installation: The kit includes all necessary O-rings, plugs, and instructions, allowing for faster assembly and 25% less downtime during maintenance.

Why Choose Seadweer?
Seadweer guarantees 100% original Atlas Copco spare parts, sourced directly from authorized manufacturing facilities. By using genuine OSV/CV kits, engineers can ensure maximum reliability, prevent costly breakdowns, and maintain compressor warranty coverage. Each kit undergoes strict quality control, ensuring compatibility and consistent performance for industrial users worldwide.
FAQs
1. What is the function of the OSV/CV Kit C111 in an Atlas Copco air compressor?
The OSV/CV Kit C111 regulates oil flow and prevents backflow during compressor shutdown, ensuring safe and efficient operation of the system.
2. How often should the OSV/CV Kit C111 be replaced?
It is recommended to replace the kit every 8,000 hours of operation or as specified in your compressor’s maintenance schedule.
3. Is this kit compatible with all Atlas Copco oil-injected screw compressors?
The C111 kit is designed for specific Atlas Copco compressor models. Please contact Seadweer for model compatibility details before purchasing.
4. What makes this kit better than aftermarket options?
This original Atlas Copco kit offers up to 35% longer service life and over 99% sealing reliability, ensuring maximum performance and reduced maintenance costs.
5. Can Seadweer ship this product internationally?
Yes, Seadweer provides fast global shipping and reliable after-sales support for all Atlas Copco parts.

More Valves List
If you need other Atlas Copco air compressor valves, we provide more models in the table below or you can submit your requirements to us directly.
| Part Number | Part Name | Part-Number |
| 1638106080 | RELIEF VALVE | 1638-1060-80 |
| 1639000032 | VALVE QMV MACHINED | 1639-0000-32 |
| 1639000134 | VALVE ACTUATOR | 1639-0001-34 |
| 1639000135 | INLET VALVE | 1639-0001-35 |
| 1639611059 | DN50 BUTT. VALVE PN16 NBR | 1639-6110-59 |
| 1639611060 | DN65 BUTT. VALVE PN16 NBR | 1639-6110-60 |
| 1639611061 | DN80 BUTT. VALVE PN16 NBR | 1639-6110-61 |
| 1639611062 | DN100 BUTT. VALVE PN16 NBR | 1639-6110-62 |
| 1639611063 | DN125 BUTT. VALVE PN16 NBR | 1639-6110-63 |
| 1639611085 | BUT.VALVE 2+BT16G-400-14P-PCD | 1639-6110-85 |
| 1639611139 | BUT.VALVE BRAY 3+ PN16 | 1639-6111-39 |
| 1639611140 | BUT.VALVE BRAY 4+ PN16 | 1639-6111-40 |
| 1639613002 | 2204010329 CHECK VALVE DN150 | 1639-6130-02 |
| 1639613003 | 2204010326 CHECK VALVE DN80 | 1639-6130-03 |
| 1639613005 | 2204010362 CHECK VALVE | 1639-6130-05 |
| 1639613006 | 2204010326 CHECK VALVE | 1639-6130-06 |
| 1639613008 | 2204010331 CHECK VALVE | 1639-6130-08 |
| 1639613009 | 2204010328 CHECK VALVE | 1639-6130-09 |
| 1639613013 | CHECK VALVE DN50 | 1639-6130-13 |
| 1639613014 | CHECK VALVE DN65 | 1639-6130-14 |
| 1639613015 | check valve DN80 | 1639-6130-15 |
| 1639613021 | CHECK VALVE DN65-7.3 | 1639-6130-21 |
| 1639613025 | CHECK VALVE DN100-12.0 | 1639-6130-25 |
| 1639613032 | VALVE ANGLE SEAT DN25 | 1639-6130-32 |
| 1639613033 | VALVE ANGLE SEAT DN40 | 1639-6130-33 |
| 1639613035 | CHECK VALVE SST.REF1624843700 | 1639-6130-35 |
| 1639613038 | CHECK VALVE DN25-3.0 | 1639-6130-38 |
| 1639613044 | CHECK VALVE DN150 WITH SPRING | 1639-6130-44 |
| 1639613054 | CHECK VALVE WITH LIMIT | 1639-6130-54 |
| 1639613058 | CHECK VALVE WITH LIMIT 6+ | 1639-6130-58 |
| 1639614122 | JQPT -G1+ ANGLE VALVE | 1639-6141-22 |
| 1639614135 | JORC DRAIN VALVE SD1000 | 1639-6141-35 |
| 1639614139 | JORC DRAIN VALVE | 1639-6141-39 |
| 1639630499 | SOLENOID VALVE ASSEMBLY | 1639-6304-99 |
| 1639630500 | SOLENOID VALVE ASSEMBLY | 1639-6305-00 |
| 1639630501 | SOLENOID VALVE ASSEMBLY | 1639-6305-01 |
| 1639630502 | NEEDLE VALVE ASSEMBLY | 1639-6305-02 |
| 1639640010 | NEEDLE VALVE GASKET | 1639-6400-10 |
| 1639663600 | 2204008264-EXPANSION VALVE | 1639-6636-00 |
| 0830100822 | Safety Valve | 0830-1008-22 |





















Anonymous –
Highly reliable part and service!
This OSV/CV Kit from Seadweer works perfectly! Easy installation, genuine quality, and our compressor’s performance is now optimal. Highly reliable part and service!