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Open Drive Screw Compressors - OS53./OS74. SP-500-3

Open Drive Screw Compressors - OS53./OS74.  SP-500-3
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Open Drive Screw Compressors - OS53./OS74. SP-500-3

Product catalog summary
Overview: The document outlines the technical specifications and features of the OS Series 53-74 open drive screw compressors, emphasizing their energy efficiency, versatility, robust design, and low vibration operation. It includes details on technical features, lubricants, application limits, and performance data for various refrigerants.
Key Features:
  • Energy Efficiency: Incorporates a high-efficiency profile and economiser operation to reduce energy consumption.
  • Versatility: Compatible with multiple refrigerants such as R134a, R404A, R507A, R407C, R22, and NH3.
  • Robust Design: Features include generously dimensioned bearings and high-quality shaft seals.
  • Low Vibration: Ensures steady discharge characteristics with only rotating masses.
  • Parallel Compounding: Facilitates high system capacity and optimal performance with part and full load adjustments.
Technical Features:
  • Long-life Bearings: Pressure unloading minimizes refrigerant dilution in oil.
  • Capacity Control: Efficient control through shifting of the suction port, with options for full and part load operations.
  • Emergency Running Characteristics: Includes rolling contact bearings and a check valve to prevent reverse running.
  • Economiser Operation: Enhances performance and efficiency for middle and high compression ratios.
Lubricants: Specifies compatible oil types and their operating conditions, with a need for individual agreements with BITZER for certain oils.
Application Limits: Provides detailed performance data for different refrigerants, outlining operational limits and conditions.
Accessories and Additional Features:
  • Direct motor mounting and electronic protection devices.
  • Comprehensive accessory program including oil separators, coolers, and coupling housings.
Conclusion: The OS Series 53-74 compressors are designed for high efficiency and versatility, suitable for a wide range of applications with robust construction and advanced features for optimal performance.
Specifications:
Performance data is based on the European Standard EN 12900, operating at 2900 min-1 (50 Hz), detailing evaporating and condensing temperatures under 'dew point' conditions (saturated vapor).
Liquid Subcooling:
Under standard conditions, no liquid subcooling is considered according to EN 12900, resulting in lower rated cooling capacity and efficiency compared to data with 5 or 8.3 K subcooling.
Economiser Operation:
Data for economiser operation includes liquid subcooling, with the liquid temperature defined as 5 K above the saturated temperature at the economiser inlet.
Individual Operating Points:
The BITZER Software allows for detailed compressor selection with individual data input, providing output data on performance parameters, application limits, technical data, and more. Specific data sheets can be generated for further use.
Type Designation:
Details the type designation for open screw compressors, including application range, housing size, displacement, and compressor execution.
Application Limits:
Application limits are provided for various refrigerants and conditions, with specific notes on oil cooling and ECO operation. The BITZER Software is recommended for determining necessary oil cooler capacity and ECO application limits.
Performance Data:
Performance data are provided for different compressor types and conditions, including cooling capacity and power consumption. Data are based on 10 K suction superheat without liquid subcooling, at a motor speed of 2900 min-1 (50 Hz).
Specifications:
For operation with NH3 (ammonia), special oils are required. Refer to page 6 under the section "Lubricants" for more details.
Performance Data:
- Standard operation: Performance data is provided without liquid subcooling.
- Economiser operation: Performance data includes liquid subcooling (tcu = tms).
Compressor Types and Technical Data:
Lists various compressor models such as OSKA5341-K, OSKA5351-K, OSKA5361-K, etc., along with their technical specifications including displacement volume at different speeds (2900 min-1 and 3500 min-1), coupling types, nominal capacity steps, rotation direction, speed, and pipe connections.
Connection Positions:
- High pressure connection (HP)
- Low pressure connection (LP)
- Discharge gas temperature sensor (HP)
- Economiser/liquid injection
- Oil injection
- Oil pressure connection
- Threaded hole for foot fixation
Additional Notes:
- Effective capacity stages depend on operating conditions.
- Capacity regulator is a special accessory.
- Dimensional drawings and connection positions are provided for specific models.
Contact Information:
Bitzer Kühlmaschinenbau GmbH, Eschenbrünnlestraße 15, 71065 Sindelfingen, Germany. Phone: +49 (0) 70 31 932-0, Fax: +49 (0) 70 31 932-146 & -147, Website: www.bitzer.de, Email: [email protected]
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Catalog excerpts

Open Drive Screw Compressors - OS53./OS74.  SP-500-3-2

Inhalt Seite Displacement from with parallel operation up to Content Page The Decisive Technical Features 3 avec fonctionnement en parallele Sommaire Page Donnees de puissance pour Die OS-Schrauben setzen weltweit den MaRstab fur technische Inno- vation, Vielseitigkeit und Effizienz • effiziente Leistungsregelung • groBzugige Lagerdimensionierung • hochwertige Wellenabdichtung • gleichmaBige Fordercharakteristik □ Vielseitig durch Verbund- • hohe Systemleistung niedrigster Energiebedarf bei Voll- - Teillast durch Verdichter-Abschal- - Feinabstufung durch zusatzliche Standard for Technical Innovation,...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-3

Die eng gestufte Leistungspalette The Closely Graduated Capacity Range Plage de puissance étroitement échelonnée m3/h 500 Fördervolumina Displacemets (2900 min-1) Volumes balayés 375 250 125 OS.85 siehe Prospekt SP-510 OS.85 see brochure SP-510 OS.85 voir prospectus SP-510 OS .(A )85 71 )85 61 .(A OS )85 51 .(A )74 71 OS .(A )74 61 OS OS .(A )74 51 .(A OS )74 41 OS .(A .53 63 OS .53 53 OS OS .53 43 0 Die entscheidenden technischen Merkmale The Decisive Technical Features Les critères techniques déterminants ❏ Dauerfeste Lagerung mit Druckentlastung ❏ Approved, long-life bearings with pressure...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-4

❏ Hochwertige Wellenabdichtung • mit Metallfaltenbalg ❏ High-quality shaft seal • with metal bellow ❏ Garniture d'étanchéité de haute qualité • avec soufflet métallique ❏ Leistungsregelung • effiziente Leistungsregelung durch Verschieben der Ansaugkante OS.7451 .. OS.7471: 100/75/50% OS.53.. OS.7441: 100/75% • hydraulische Steuerkolben – bei Volllast-Betrieb absolut formschlüssig • gleichzeitig Schutz gegen Flüssigkeitsschläge und starke Überkompression ❏ Capacity control • efficient capacity control by shifting of the suction port OS.7451 .. OS.7471: 100/75/50% OS.53.. OS.7441: 100/75% • hydraulically...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-5

❏ Direkter Motoranbau • Flansch auf der Antriebsseite zur direkten Montage von Kupplungsgehäuse und Motor ❏ Direct motor mounting • flange at driving side for direct mounting of coupling housing and motor ❏ Montage direct sur le moteur • bride and côte de commande pour montage direct de cage d'accouplement et de moteur ❏ Elektronische Schutzeinrichtungen • Druckgas-Temperaturfühler (PTC) und SE-B2 ❏ Electronical protection devices • discharge gas temperature sensor and SE-B2 Dispositifs de protection électroniques • sonde de température du gaz au refoulement et SE-B2 ❏ Bausatz für Öleinspritzung...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-6

Weitere Hinweise siehe Projektierungs- © Betrieb mit gleichwertigen Mineralolen oder PAO-Olen ist mdglich, bedingt jedoch individuelle Abstimmung mit BITZER. Supplementary information see Applica- 0 Operation with equivalent mineral oils or PAO oils is possible but must be individually agreed on with BITZER nformation supplemental voir Manuel de 0 L'emploi d'huiles equivalentes, minerales ou PAO est possible, mais ceci necessite cependant une concentration individuelle avec BITZER. Leistungsdaten basieren auf der euro- paischen Norm EN 12900 und Betrieb hen sich darin auf "Taupunktwerte" sprechend...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-7

Typenbezeichnung Type designation Designation des types OSKA 7461 –K Offener Schraubenverdichter OSKA 7461 –K Open screw compressor OSKA 7461 –K Compresseur à vis ouvert OSKA 7461 –K Anwendungsbereich (K oder N) OSKA 7461 –K Application range (K or N) OSKA 7461 –K Champ d'application (K oder N) OSKA 7461 –K NH3-Ausführung OSKA 7461 –K NH3 design OSKA 7461 –K Construction pour NH3 OSKA 7461 –K Gehäusegröße (53/70/74) OSKA 7461 –K Housing size (53/70/74) OSKA 7461 –K Taille de carter (53/70/74) OSKA 7461 –K Fördervolumen (4/5/6) OSKA 7461 –K Displacement (4/5/6) OSKA 7461 –K Volume balayé (4/5/6)...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-9

Einsatzgrenzen R22 Application limits CR 100% Limites d'application R22 60 CR 75% ■ CR 50% 60 OSN tc tc OSN 50 50 40 40 30 30 OSK OSK 20 20 toh = 10 K toh = 10 K 10 -50 NH3 -40 -30 -20 -10 0 10 -50 20 to CR 100% NH3 60 tc -40 -30 -20 -10 0 20 to CR 75% ■ CR 50% 60 tc [ OSNA 50 50 OSNA 40 40 30 30 OSKA 20 OSKA 20 toh = 10 K 10 -50 -40 -30 -20 -10 0 to toh = 10 K 20 10 -50 -40 -30 -20 -10 0 to 20 Legende Legend Légende to Verdampfungstemperatur (°C) tc Verflüssigungstemperatur (°C) ∆toh Sauggasüberhitzung to Evaporating temperature (°C) tc Condensing temperature (°C) ∆toh Suction superheat to Température...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-10

ohne Flussigkeits-Unterkuhlung, Motor- Performance data based on 10 K suction superheat without liquid subcooling, motor se referant a surchauffe a Inspiration de 10 K, sans sous-refroidissement de liquide Klima-/Normalbereich© High-/Medium temperature range© Climatisation/Moyennes temperatures© Leistungsdaten fur individuelle Eingabewerte und Performance data for individual input data and Donnees de puissance pour des donnees d'entree 60 Hz-Betrieb siehe BITZER Software 60 Hz operation see BITZER Software individuelles et fonctionnement a 60 Hz voir BITZER © Leistungsdaten fur Betrieb bei tieferer...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-11

zung, ohne Flussigkeits-Unterkuhlung Performance data based on 10 K suction superheat, without liquid subcooling, motor se referant a surchauffe a Inspiration de 10 K, sans sous-refroidissement de liquide Klima-/Normalbereich High-/Medium temperature range Climatisation/Moyennes temperatures Economiser operation Fonctionnement avec economiseur Leistungsdaten fur individuelle Eingabewerte und 60 Hz-Betrieb siehe BITZER Software Performance data for individual input data and 60 Hz operation see BITZER Software Donnees de puissance pour des donnees d'entree individuelles et fonctionnement a 60 Hz...

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Open Drive Screw Compressors - OS53./OS74.  SP-500-3-12

ohne Flussigkeits-Unterkuhlung, Motor- Performance data based on 10 K suction superheat without liquid subcooling, motor se referant a surchauffe a Inspiration de 10 K, sans sous-refroidissement de liquide High-/Medium temperature range Climatisation/Moyennes temperatures Verdichter Verfl.- Compressor Cond type temp Cooling capacity Puissance frigorifique Leistungsaufnahme (Welle) Power consumption (shaft) Puissance absorbee (arbre) Basses temperatures Compressor Cond type temp Cooling capacity Puissance frigorifique Leistungsaufnahme (Welle) Power consumption (shaft) Puissance absorbee (arbre)...

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