ضاغط الهواء اللولبي الدوار المزود بنظام حقن الزيت من طراز Atlas Copco GA 75 VSD (VSD⁺ FF)

الوصف

The Atlas Copco GA 75 VSD carries variable speed drive technology into the 75 kW class of the oil-injected screw range. It pairs a newly designed compression element with an oil-cooled interior permanent magnet motor rated at 75 kW, and the Full Feature branch integrates a refrigerant dryer inside the same upright package. The versions cover a working pressure band from 4 to 12.5 bar, with free air delivery between 26 and 226 l/s depending on the setting and the air demand at the moment. The model family comes in two frames: the compact GA 75 VSD⁺ and the large-frame GA 75L VSD⁺, which widens the flow window to 47 to 269 l/s on the same 75 kW drive.

The machine belongs to the GA 37-110 VSD⁺ platform, which applies one design logic across the whole power band: the drive slows down when the plant needs less air and speeds up when demand returns. For a plant running two shifts with weekend pauses, the GA 75 VSD removes most of the unloaded running that burns electricity without producing air.

Where the GA 75 VSD Fits in the Oil-Injected Range

Atlas Copco positions the GA 75 VSD as the compact route to VSD+ technology inside the GA 37-110 VSD+ family. Plants that previously dismissed variable speed drive as a large-machine option can now place the same drive concept in a frame that measures just over one meter deep. The oil-injected design keeps the element lubricated and sealed by the oil film itself, which suits general industrial air from 4 bar up to 13 bar maximum working pressure.

ما الذي تشمله تسميتا VSD و FF

The VSD part of the name refers to the variable speed drive: an in-house designed Neos inverter adjusts the motor speed continuously so the delivered air matches the demand curve of the plant. The FF suffix marks the Full Feature branch, which adds a refrigerant dryer, filters and an electronic no-loss drain inside the same enclosure. Both branches share the same element, the same motor and the same control platform, so a plant can start with the standard package and move to Full Feature without changing its installation footprint in height.

Technical Specifications of the GA 75 VSD

The table below condenses the GA 75 VSD into its headline figures:

نطاق التدفق في نظام VSD+ عبر نطاق الضغط

Each pressure version covers a wide flow window because the drive modulates between a low idle and full speed. The figures below apply to the GA 75 VSD+ in its four settings, with the rows marked GA 75L VSD+ covering the large-frame branch:

The figures apply to the 50/60 Hz version of the machine. Unit performance is measured according to ISO 1217, annex E, edition 4:2009, and the FAD is measured at the effective working pressures of 4, 7, 9.5 and 12.5 bar(e). The maximum working pressure is 13 bar(e) / 188 psig. The noise level of 70 dB(A) is the mean value measured at a distance of 1 m at maximum working pressure according to ISO 2151:2004 using the ISO 9614/2 sound intensity method, with a tolerance of 3 dB(A).

The 4 bar setting deserves attention from plants running low-pressure networks for textile air, glass molding or pneumatic conveying. At that setting the GA 75 VSD turns down to 26 l/s, an eighth of its maximum, which keeps the network pressurized during breaks without blowing off surplus air.

الأبعاد والوزن

The upright, compact layout keeps the floor area of the GA 75 VSD small. The standard package measures 1100 mm deep, 1153 mm wide and 1968 mm high, and the Full Feature branch adds width for the integrated dryer to reach 1656 mm, with depth and height unchanged.

The standard package weighs 920 kg and the Full Feature branch weighs 1120 kg.

The large-frame GA 75L VSD+ branch measures 1400 mm deep, 1300 mm wide and 1968 mm high as standard package, extends to 2178 mm deep with the integrated dryer, and weighs 1207 kg and 1496 kg respectively, with a mean sound pressure level of 73 dB(A).

The vertical design eases maintenance access and saves valuable workspace, which matters in compressor rooms where the walls are already lined with equipment.

Compact Frame and Low Sound Level

عمق يبلغ مترًا واحدًا في غرفة الآلات

Many plants replace an aging compressor without enlarging the compressor room. The GA 75 VSD was laid out vertically for exactly this situation: the package stands tall rather than long, so the installation depth stays at 1100 mm for both branches. A GA 75 VSD that fits into the same bay as the unit it replaces avoids civil work, and the integrated treatment chain of the Full Feature branch removes the need for a separate dryer bay beside the compressor.

70 dB(A) at the Work Station

The GA 75 VSD posts a sound pressure level of 70 dB(A), among the lowest in this power class. Compressor rooms attached to production halls, basement plant rooms below offices and leased buildings with shared walls all benefit from a quieter machine. The acoustic design keeps the noise at the work station low without sacrificing the cooling airflow that the element and motor need.

محرك iPM ومحول Neos

تبريد بالزيت وحماية من فئة IP66

The interior permanent magnet motor of the GA 75 VSD exceeds IE5 standards, and it runs oil-cooled: the same oil circuit that lubricates and seals the element also removes the heat from the motor windings. This design keeps the motor compact and protects it against dust and moisture with IP66 pressure-tight sealing, so no cooling air has to be blown through the motor compartment.

كفاءة نظام الدفع IES2

تم تصميم محول Neos داخليًّا، وهو يتحكم في محرك iPM كزوج متوافق. ويحقق كل من المحول والمحرك معًا كفاءة تفوق متطلبات IES2 الواردة في المعيار EN 50598 فيما يتعلق بكفاءة محرك الطاقة، مما يعني أن الخسائر بين مصدر التيار الكهربائي وعمود الضاغط تظل منخفضة عبر نطاق السرعة بأكمله. يتمتع المحول بدرجة حماية IP5x داخل غلاف متين من الألومنيوم، ويتم تبديد الحرارة الناتجة عنه في حجرة منفصلة، مما يحافظ على برودة المكونات الكهربائية ويطيل من عمرها التشغيلي.

كيف تلبي خدمة VSD+ الطلب على الهواء

استقرار الضغط ونطاق التشغيل

A fixed speed machine reacts to falling demand by loading and unloading, and every unloaded minute consumes power while producing no air. The GA 75 VSD instead adjusts the motor speed so the GA 75 VSD tracks the demand curve. The pressure band stays where the setpoint is, the GA 75 VSD idles down to a fraction of its capacity, and the electricity bill reflects the air actually produced. Variable speed drive technology generates energy savings of up to 50 percent, and the lowered system pressure that VSD+ allows adds further savings because every bar of unnecessary pressure costs energy.

بدء التشغيل تحت ضغط النظام

The GA 75 VSD can start and stop under full system pressure. The GA 75 VSD needs no network venting before a restart after a weekend shutdown, and no unloading sequence delays the first cubic meter of air on Monday morning. This behavior also allows the machine to act as a trim unit alongside base-load machines without interaction problems on the header.

تقرير شامل: مجفف المبرد المدمج

The Full Feature branch integrates a refrigerant dryer into the package, sized for the GA 75 VSD so no excess energy is consumed at part load. The dryer holds the pressure dew point between 2 and 3 degrees Celsius at the reference conditions, and the whole treatment chain sits inside the same upright frame. Plants gain dry air at the outlet without piping a second unit, and the layout stays as compact as the compression side.

إدارة المكثفات

يخرج المكثف الناتج عن المجفف والفاصل عبر صمام تصريف إلكتروني بدون فقدان، والذي يزيل الماء دون إهدار الهواء المضغوط. ويتم التحكم في صمام التصريف ومراقبته بواسطة وحدة التحكم، بحيث يتم الإبلاغ عن أي انسداد أو عطل في الصمام بدلاً من أن يتسبب ذلك في إغراق الشبكة التالية بصمت.

المراقبة والتحكم والاتصال

SMARTLINK و OPC UA

The Elektronikon Touch controller governs the machine and logs the operational parameters. SMARTLINK remote monitoring is standard and reports the operational parameters of the GA 75 VSD to a computer or smartphone, so the service planning is based on real data instead of fixed calendars. OPC UA connectivity integrates the compressor into the production monitoring system as well, which turns the machine into a data point on the factory floor rather than a black box in the corner.

استعادة الطاقة وخيارات المصنع

A specifically developed energy recovery system can be built into the GA 75 VSD, recovering up to 75 percent of the power input as hot air or hot water. For a plant that heats workshops or process water, the recovered energy offsets a separate heating bill. Further options cover different voltage supplies, cold-weather kits, and service-friendly layouts, so the package can be matched to the site conditions without losing the factory warranty coverage.

Applications of the GA 75 VSD

The GA 75 VSD serves plants whose air demand fluctuates across the day: automotive body shops with spray booths and lifts, food and beverage lines that stop at weekends, plastic processing with cyclical mold changes, and general manufacturing where shift patterns leave long low-load windows. The 4 bar low-pressure setting extends the reach into textile mills, glass plants and pneumatic conveying networks that run dedicated low-pressure headers. Workshops that consolidate several small compressors into one machine also fit the profile, because the wide flow window replaces the cascade control of multiple units with a single modulating machine.

Service and Support Around the GA 75 VSD

The drive train of the GA 75 VSD runs without a gearbox or coupling between motor and element, which removes slippage losses and the associated maintenance items. Service points are arranged for access from the front of the machine, and the electronic components sit in their own compartment away from the hot compressor section.

Atlas Copco fluids and lubricants are tailored to the GA 75 VSD with anti-oxidation additives that hold their protective qualities across the service interval.

For the drive motor overhaul scope on the GA VSD+ platform, see the GA VSD+ Motor Overhaul Kit. The installed base of the GA 75 VSD and its Full Feature branches runs across continents, and Seadweer supports the machine with original spare parts, service kits and technical documentation for every configuration.

الأسئلة الشائعة

What does VSD+ mean on the GA 75 VSD?

VSD+ هو الاسم الذي تطلقه شركة أطلس كوبكو على الجيل الجديد من محركات السرعة المتغيرة المزودة بمحرك داخلي ذي مغناطيس دائم ومحول Neos المصنوع داخليًّا. تتكيف سرعة المحرك مع الطلب على الهواء، مما يمنع التشغيل بدون حمل ويوفر ما يصل إلى 50 في المائة من الطاقة مقارنةً بالتشغيل بسرعة ثابتة.

Is the GA 75 VSD an oil-injected machine?

Yes. The element is lubricated and sealed by injected oil in the usual rotary screw manner, and the oil is separated from the delivered air inside the package. The GA 75 VSD belongs to the oil-injected GA 37-110 VSD+ platform.

How much air does the GA 75 VSD deliver?

The flow window spans 26 to 226 l/s (55 to 480 cfm) depending on the pressure setting and the actual air demand. At 7 bar the machine covers 27 to 225 l/s between idle and full speed. The large-frame GA 75L VSD+ branch reaches up to 269 l/s at 4 bar.

What does FF add to the GA 75 VSD?

يضم الفرع «Full Feature» مجففًا يعمل بالغاز المبرد بنقطة ندى ضغط تتراوح بين 2 و3 درجات مئوية، ونظام ترشيح، وصمام تصريف إلكتروني بدون فقدان للسائل، كل ذلك داخل نفس الهيكل. ويبلغ عرض هذا الفرع 1656 ملم بدلاً من 1153 ملم، بينما يظل العمق والارتفاع دون تغيير.

How loud is the GA 75 VSD?

The mean sound pressure level is 70 dB(A), measured at 1 m distance at maximum working pressure according to ISO 2151:2004 with a tolerance of 3 dB(A).

Which industries run the GA 75 VSD?

Typical users include automotive plants, food and beverage producers, plastics processors and general manufacturing with fluctuating demand, plus low-pressure applications such as textiles, glass and pneumatic conveying on the 4 bar setting.