Atlas Copco 1616770780 Air End for GAVSD+ Compressors

Identification

Construction

The element uses a precision housing that holds tight rotor tolerances. Hardened rotors resist wear under continuous load. Preloaded bearings keep axial and radial movement within design limits. Oil injection cools the rotors and seals the compression chamber. The exact displacement and pressure ratings follow the specific GAVSD+ configuration in service.

Two Interlocking Rotors

A screw air end works through two meshing rotors turning inside a fixed housing. The male and female rotors trap air in the decreasing space between them. Rotation moves the trapped volume toward the discharge port. This action raises the air pressure without any reciprocating piston. The design gives steady, pulse-free output across the running cycle.

Oil Injection and Sealing

Oil enters the compression chamber with the incoming air. It cools the rotors and forms a film that seals the gaps between rotor and housing. The oil also carries heat away from the compression zone. After compression the oil-air mixture leaves the element toward the separation system. Clean air then continues to the point of use.

Variable-Speed Operation

The GAVSD+ drive adjusts motor speed to match air demand. The air end responds to that changing speed by delivering more or less flow. Keeping the rotor geometry intact preserves the efficiency the drive is designed to achieve. A fresh element returns the compressor to its designed performance band.

Discharge and Separation

Compressed air leaves the element together with the oil mist. The mixture travels to the separation system placed downstream. There the oil is removed and returned to the circuit. Clean air continues to the point of use. The air end itself focuses only on generating pressure, not on final air treatment.

Single-Stage Compression

This element compresses in a single screw stage suited to the GAVSD+ power band. A single stage keeps the package compact and the parts count low. The rotor profile is shaped to hold efficiency across the speed range. Extra staging would raise complexity without benefit at this output level.

Installation Steps

Remove the old element and clean the mounting faces. Fit new seals and gaskets supplied with the service. Align the shaft with the drive coupling to specification. Torque all fasteners to the GAVSD+ model values. Reconnect oil lines and sensing points. Follow the compressor service manual for the exact sequence.

Commissioning and Verification

Run the compressor and check for oil leaks at the seals. Confirm discharge pressure reaches the expected level. Compare vibration readings with the baseline record. Verify temperatures stay within the normal range. Record the new serial number and service date. These steps confirm a correct installation.

Maintenance Practices

Monitor bearing vibration on a regular schedule. Track running current and discharge temperature against baseline. Perform oil and filter service at the recommended intervals. Keep the cooling path clear of dust and oil mist. Good maintenance extends the life of the new air end and protects the wider compressor.

When to Service

Plan the air-end swap before output falls below the duty need. Do not wait for a full breakdown that stops production. A declining element wastes energy every running hour it stays in service. Schedule the exchange in a planned window to limit downtime. Keep the removed unit's serial number for the service record.

Pre-Installation Inspection

Check the new element for transit damage before fitting. Confirm the shaft and flange match the removed unit. Verify seal and gasket kit completeness. Inspect the mounting face on the compressor for scoring. A short inspection prevents a repeat teardown after start-up.

Spare Parts Planning

Plants that run several GAVSD+ machines benefit from holding the element as planned stock. A ready unit shortens an outage from days to a single shift. The individually identified build record also supports fleet-wide maintenance tracking. Planners can match each installed element to its service date and running hours.