Howden Compressor Manual
WORLD PIONEERS OF ROTARY TWIN SCREW COMPRESSORS HOWDEN MANUFACTURES OIL INJECTED AND OIL FREE ROTARY TWIN SCREW COMPRESSORS, AND SUPPLIES BARE SHAFT OIL INJECTED SCREW COMPRESSORS FOR USE IN THE REFRIGERATION, GAS PROCESSING AND OTHER INDUSTRIES. Rotary twin screw compressor technology was developed in the 1930s by a Swedish company, SRM, in collaboration with Howden. We manufactured the world's first operational screw compressor and further developed the technology in the 1960s with the introduction of the oil injected twin screw compressor.
This has revolutionised designs of refrigeration and gas. Screw compressor in Howden process gas package the highest quality compressors in the industry. We employ state of the art machine tools to attain the highest possible accuracy and tolerances so as to produce compressors with high efficiency and outstanding reliability. All rotors for Howden twin screw compressors are machined from solid bar or forgings on highly accurate cutting machinery. The standard material is carbon steel, but forgings or special alloys can be used for more arduous applications. Following machining and balancing to ISO standards, male and female rotors are paired for assembly.
BEST PRACTICES LIFETIME QUALITY AND CARE QUALITY CONTROL controlled manufacturing environment and Howden companies are accredited external audits of quality control systems are applied to ensure continued compliance with necessary control procedures. For particular applications quality plans are prepared to meet specific customer requirements. Today in thousands of applications worldwide, Howden screw compressors provide high integrity, low maintenance solutions for liquid chilling, direct DESIGN SPECIFICATIONS Ourtwin screw compressors are designed to match the exacting specifications required. TWIN SCREW COMPRESSORS DESIGN CONCEPT Compression is achieved by the intermeshing of two helical rotors contained in a suitable casing.
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Figures 1-4 give details of the compression cycle. The Howden twin screw compressor is a positive displacement rotary design. As such it has the characteristics and stability of reciprocating compressors but in addition offers particular. Reduced physical size. Fewer moving parts.
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Extended operating life cycle. Our compressors have a range of design options. Twin wall construction with sleeve bearings. Single wall construction with roller bearings. VERSATILE PROCESS COMPRESSORS FOR ALL APPLICATIONS WRV compressors set the standard against which industry comparison is made for both gas and refrigeration applications. Compressors include: Plain-Shell Type Journal Bearings Long operational life span. Double Wall Construction Suitable for high pressure application.
Optional Material of Construction Flexibility to match project specification (e.g. Oil Injected Seal/Bearing Construction High quality gas seal from simple construction. Probably the most comprehensive range of capacity available. Installed Compressors compressors installed. XRV compressors have been developed specially for the refrigeration market. Compressors include: Ideal for horizontal separator applications.
No oil pump for over 90% of installations. Available with either adjustable or fully automatic Vi system. Stepless Capacity Control Combined with variable Vi, gives maximum energy saving. Separate end covers give easy access to rolling elements. TYPICAL OPERATING ENVELOPE - R717 REFRIGERANT VARIABLE VOLUME RATIO ^^^VATORATOR TEMPERATURE Two forms of variable volume control are available. ADJUSTABLE VOLUME RATIO (MVI) 2. AUTOMATIC VARIABLE VOLUME RATIO.
WRV TECHNICAL DATA: TYPICAL PERFORMANCE EVAPORATION TEMPERATURE TYPICAL EFFECT OF SUPERFEED EVAPORATION TEMPERATURE TYPICAL PERFORMANCE Typical gases or refrigerants handled by the Howden range of oil injected screw compressors include: Refrigerants Gases Carbon Dioxide NB. In some cases, for example in refineries, hydrocarbon gases will be used as refrigerants. The Howden superfeed system is a development of the oil injected screw compressor design. All oil injected compressors are equipped with an additional gas port, located along the length of the compression chamber. Feeding refrigerant to. XRV TECHNICAL DATA: TYPICAL PERFORMANCE REFRIGERATION CAPACITY EVAPORATION TEMPERATURE XRV SUPERFEED EFFECT AMMONIA REFRIGERATION CAPACITY REFRIGERATION CAPACITY EVAPORATION TEMPERATURE REFRIGERATION CAPACITY ■ Full duty 50 Hz (excluding Superfeed) ■ Full duty 60 Hz (excluding Superfeed) Refrigeration capacity based on 5.6°C (10°F) superheat at compressor suction and no sub-cooling of condensed liquid. No allowance has been made for pressure losses between the evaporator and the compressor suction flange.
Focussing on its global expertise in compressors, fans and heat exchangers, Howden delivers first class technology, project management and customer support. Wherever our customers are located, a Howden office is close at hand. With engineering, manufacturing and sales offices throughout the world, we understand and satisfy local market needs. Howden Compressors Scotland, United Kingdom Email: sales@howdencompressors.co.uk Email: aftersales@howdencompressors.co.uk Suite 12B01 Jinyu Mansion Xicheng District Email: sales@howden.com.cn Howden South America E-mail: compressors@howden.com.br Chaika. All Howden BC Compressors catalogues and technical brochures.
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