API 617 Centrifugal Compressor - Overhung

Overhung single stage compressors of simple and efficient design with compact size. They are used mainly for boosting in petrochemical and pipeline applications or for recycle in petrochemical plants
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Design Philosophy

The single-stage overhung configuration ensures simplicity and ease of maintenance. Almost all gases can be handled with appropriate construction materials and seal systems.

Two product lines are available:
  • Overhung compressors (SRL and DH series): rugged heavy duty construction based on API 617, mainly used as petrochemical applications, up to medium-high pressures.
  • Blowers (D series): low-pressure, heavy-duty design typically utilized for relatively high flow of gas at a moderate differential pressure.

Features like three-piece casing construction, horizontally split bearing housing are examples of how these compressors are designed from the ground up to provide maximum reliability and serviceability. These compressors offer a choice of models and seal options, as well as the design flexibility and optional equipment to conform to your specifications. Accessory packages include a variety of drivers, sound attenuation, a lubrication console and advanced control functions.

Applications

The single-stage overhung compressors are mainly used in the petrochemical industry as gas boosters and for recycle in polypropylene, polyethylene and ethylene oxide plants, as well as for natural gas boosting.
The blower compressor is a low-pressure design typically used when a tough process gas application requires a relatively high flow of gas with a low pressure ratio. It features a compact, efficient design and the ability to handle a wide range of applications.

Testing Capabilities

The units can be string or full-load tested in our shop, with both ASME PTC 10 type I or type II criteria, thus concentrating the responsibility for the complete train in the hands of a single source supplier.

Internal test rigs with electric motor drivers and steam turbines are available for standard shop tests and open loop air performance tests.

External test rigs with special facilities for string and full load tests of complete turbocompression trains ensure full compliance with customer-specific requirements.

Our Virtual Witness System allows customers to monitor tests remotely and securely via the Internet.

In addition to open-loop air and closed-loop gas options, and full-load, full-pressure mechanical testing, we offer a new high speed balancing system

Performance & Product Characteristics

  • Impellers are 3D, backswept, semi-open or closed type, overhung mounted on the shaft
  • Inlet guide vanes are available for fixed-speed units driven by an electric motor
  • Axial inlet flow
  • Advanced seal system option available (labyrinth, dry gas or carbon ring seal)
  • Advanced seal system option available (labyrinth, dry gas or carbon ring seal)
  • Tilting pad journal bearings, double acting pad thrust bearings
  • Casings are available in a wide range of carbon steel and stainless steel materials, both fabricated and cast
  • External gearbox to increase speed range
  • Conforms to all API-617 standard
  • Design permits many discharge nozzle locations to simplify process piping
  • Overhung Compressors Performance:
    • Inlet volume up to 100,000 m3/h
    • Pressure up to 86 bar
  • Blower Performance:
    • Inlet volumes: 3,400 to 408,000 m3/h
    • Pressure: up to 14 bar (200 psig)

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