Main oil pump wear. Check pump tolerances or look for malfunctioning pressure regulating valves.
A separate, motor-driven pre-lubrication pump is mandatory. It builds oil pressure before the main compressor start sequence begins and provides post-lubrication during coast-down. 5. Routine Maintenance and Inspection Intervals
Ensure the foundation can support the combined weight of the compressor, motor, and oil separator.
Insufficient oil injection flow, clogged oil cooler, fouled oil filters, or operating at a compression ratio beyond design limits.
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Evacuate all gas from the compressor housing and safely recover it according to local environmental regulations.
The Howden XRV 127!
Adhering to the maintenance schedule in the manual preserves warranty coverage and ensures maximum machine availability. Action Item Description Log Parameters
Inspecting the rotor lobes for scoring, pitting, or clearing anomalies.
The compressor must be mounted on a rigid, level base frame. Direct-coupled drives require precise laser alignment between the motor shaft and the compressor input shaft. Misalignment induces axial and radial forces that rapidly degrade the input shaft bearings and shaft seals. Piping and Cleanliness
Optimizes power consumption when head pressures change seasonally (e.g., changes in ambient cooling water or air temperatures).
Features a slide valve that allows for capacity control from 100% down to 10% of nominal load. 2. Technical Specifications and Description
Must be calibrated accurately during commissioning so the PLC can compute the ideal Vi position relative to suction and discharge pressures. 4. Lubrication System Requirements
Alignment offsets must account for thermal growth. The compressor casing expands more than the electric motor when reaching operating temperatures. Refer to the manual's specific cold-alignment offset tables.