Overhaul – screw compressors
Overhauls of air screw compressors: Atlas Copco, Aerzen, Ochsner, ĆKD, GHH, Ingersoll-Rand, Hafi, Alup, Ceccato.
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Scope of work performed during repairs (air compressors, gas compressors):
- replacement of antifriction bearings,
- reclamation of seals on external surfaces of rotors:
- reclamation of rotor journals,
- balancing of rotors,
- inspection of gearboxes,
- adjustment/removal of clearances,
- reclamation of covers,
- reclamation of labyrinth seals,
- inspection and reclamation of the control system: volume ratio (Vi), capacities,
- vibrodiagnostic testing of machines (before and after overhaul).
Overhauls of refrigeration screw compressors manufactured by e.g: Howden, York, Stal, Gram, Frick.WUCH Debica, Gea Grasso:
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Scope of work performed during overhauls of refrigeration compressors:
- replacement of bearings,
- reclamation of rotor antifriction bearings by centrifugal casting of bearing bushings using bearing metal alloys,
- reclamation of rotor shafts NEB at seal-shaft contact areas (graphite rings) – reclamation of bearing journals by metal spray,
- reclamation of gas seals,
- inspection of gearboxes,
- reclamation of piston rods of regulating pistons by chrome plating,
- reclamation and, if required, manufacture of new performance sliders and performance slider limiters,
- reclamation of performance slider guides,
- manufacture/reclamation of balancing pistons,
- reclamation of MR and FR rotors by pad welding and machining of orifice seals,
- reclamation of main seals (packing glands),
- balancing of rotating components,
- vibrodiagnostic testing, evaluation of equipment dynamic condition.
Overhauls:
- Roots compressors,
- Rotary compressors,
- Blade compressors,
- Water ring compressors.
Other equipment:
- Fans and ventillators,
- Hydrokinetic couplings,
- Vertical/horizontal rotation axis centrifuges,
- Decanters.
