1617653880: VALVE BUTTERFLY DN100

The Atlas Copco 1617653880 Valve Butterfly DN100 is a precision-engineered flow-control component designed specifically for Atlas Copco adsorption (desiccant) air dryers.

Product overview

The butterfly valve plays a mission-critical role in directing compressed air between the twin desiccant towers — managing both the active drying cycle and the regeneration cycle that restores the desiccant material to full capacity. Without a properly functioning butterfly valve, the continuous, uninterrupted supply of dry compressed air that modern industrial processes demand becomes impossible to maintain.

Atlas Copco adsorption dryers rely on pressure swing adsorption (PSA) technology. In a two-tower setup, one desiccant vessel adsorbs moisture from incoming compressed air while the other regenerates by purging its accumulated water vapor. The switching of airflow paths between these two towers is automated by valves like this DN100 butterfly valve (1617653880). When the valve opens or closes on command from the dryer controller, it redirects the wet compressed air stream and the regeneration purge air with precise timing — typically on cycles of five to ten minutes — ensuring the system delivers a continuous pressure dew point as low as −40 °C without any interruption to production.

This genuine Atlas Copco spare part meets the original design tolerances for pipe bore diameter (DN100 = 100 mm nominal bore), operating pressure, and actuation torque requirements of the dryer models it supports. Using a genuine part eliminates the risk of dimensional mismatches, premature seal failure, or unplanned downtime that commonly results from substitute components.

Product specifications

Application and compatibility

This 1617653880 butterfly valve is engineered for use in Atlas Copco adsorption air dryer series, where a DN100 nominal bore matches the main process air pipework. In the dryer’s automated cycle, the controller sends a signal to actuate the valve, causing the disc to rotate 90 degrees and switch the compressed air flow path from the drying tower to the regenerating tower and vice versa. This switching action — repeated many thousands of times over the dryer’s service life — demands a valve that maintains bubble-tight sealing under pressure, exhibits low torque requirements to minimize actuator wear, and resists the cyclical mechanical stress of continuous quarter-turn operation.

Industries that depend on this component include pharmaceutical manufacturing (where ISO 8573-1 Class 2 or better air quality protects product integrity), electronics and semiconductor fabrication (where moisture causes yield losses and corrosion on sensitive components), food and beverage processing (where dry air prevents contamination and packaging failures), and automotive painting lines (where water in compressed air causes paint defects and rework costs).

Product Advantages

Exact dimensional fit
Machined to Atlas Copco’s original tolerances for DN100 pipework, ensuring zero-leak seating and correct actuator torque alignment on first installation.

Extended service life
Genuine seals and disc materials handle the high-cycle fatigue demands of continuous tower switching, reducing replacement frequency compared to non-genuine alternatives.

Warranty protection
Installing genuine parts preserves the dryer’s service warranty coverage and keeps the equipment eligible for Atlas Copco’s certified maintenance programs.

Lower total cost of ownership
Avoiding valve leakage, unplanned shutdowns, and desiccant contamination events far outweighs the upfront cost difference versus non-genuine components.

Consistent air quality
Reliable tower switching keeps the pressure dew point stable at design specification, protecting downstream equipment and process quality around the clock.

Drop-in replacement
Identical part number and geometry to the factory-installed component means no modifications, no re-commissioning surprises, and faster return to full production.

Installation guidance

1. Isolate the dryer: Shut down the adsorption dryer and depressurize the entire system to atmospheric pressure. Lockout / tagout the dryer’s electrical supply following your site’s energy isolation procedure.
2. Purge residual air: Open the manual drain or vent valve on the dryer to confirm zero system pressure before opening any pipe joints.
3. Disconnect the actuator: Detach the pneumatic actuator air supply lines and the position feedback signal cable from the existing butterfly valve assembly.
4. Remove the flange fasteners: Unscrew the flange bolts securing the DN100 valve body between the process air pipe flanges. Support the valve body as the last bolts are removed.
5. Inspect the pipe flanges: Clean both mating flange faces. Inspect for corrosion, scoring, or damaged gasket seating. Replace gaskets with new Atlas Copco-specified items.
6. Position the new valve: Insert Part No. 1617653880 between the flanges, aligning the disc in the closed position and ensuring the valve’s flow-direction arrow matches the intended compressed air flow path.
7. Torque the flange bolts: Install and cross-torque all flange bolts to the specified value in the Atlas Copco air dryer service manual to achieve even gasket compression and a leak-free joint.
8. Reconnect and test the actuator: Reconnect the pneumatic actuator supply lines and signal cable. Apply instrument air to the actuator and verify full 90-degree open and close travel, checking for smooth operation and no binding.
9. Leak test and recommission: Restore system pressure slowly and perform a soap-solution leak test at all disturbed joints. Return the dryer to automatic operation and verify the pressure dew point returns to specification within the first two switching cycles.

Always refer to the specific Atlas Copco service manual for your dryer model for torque values, gasket specifications, and recommissioning test procedures. We can provide technical assistance during installation planning.

Contact Us

We are an authorized Atlas Copco distributor with over ten years of experience serving industrial customers across China. We source this 1617653880 butterfly valve directly from Atlas Copco (Shanghai) Trading Co., Ltd. — every unit we supply is new, genuine, and fully traceable. Contact our team today for pricing confirmation, lead time, and technical advice tailored to your dryer model and application.

References

1. Atlas Copco — Adsorption / Desiccant Air Dryers: How They Work. atlascopco.com
2. Atlas Copco — Compressed Air Dryers: Complete Range. atlascopco.com
3. NiGen International — Desiccant Air Dryer: How It Works + System Types Explained. nigen.com

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