Energy Machinery, Inc.
10 Reservoir Park Drive
Rockland, MA 02370
Toll Free: 1-800-643-4330
10 Reservoir Park Drive
Rockland, MA 02370
Toll Free: 1-800-643-4330
Pressure Drop through Compressor |
N/A 2 psig |
Power Consumption |
N/A 1 % |
Compressor Features |
N/A Two-Stage Variable Speed Drive |
Compressor Type |
N/A Rotary Screw |
Selectable Pressure Range |
N/A 100 to 175 psig |
Industry Standards/Certifications |
N/A Compressed Air and Gas Institute (CAGI) Energy Star Partner ISO 9001:2008 |
Series |
N/A VST |
Brands |
N/A Gardner Denver™ |
Nominal Power |
N/A 55 kW |
Operating Cost per Year (5000 hours) at Cost per kWh ($ 0.04) |
N/A 11000 USD |
Operating Cost per Year (5000 hours) at Cost per kWh ($ 0.06) |
N/A 16500 USD |
Operating Cost per Year (5000 hours) at Cost per kWh ($ 0.08) |
N/A 22000 USD |
Operating Cost per Year (5000 hours) at Cost per kWh ($ 0.10) |
N/A 27500 USD |
Operating Cost per Year (5000 hours) at Cost per kWh ($ 0.12) |
N/A 33000 USD |
Note for Compressor Energy Cost Estimator |
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Hours of operation based on two 8-hour shifts, 6 days per week. Calculations based on nominal kW. |
Additional Information |
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The Complex need - Every Air Syst em is Different ESP 20/20 qualifies the compressor for GDXTRA, Gardner Denver™'s extended warranty program on airends, delivering the tools to ensure the compressor is operating at peak performance with the peace of mind that the compressor is protected. |
Compressed Air is an Expensive Utility, but a Necessary Utility |
N/A In many manufacturing and commercial facilities, compressed air is often referred to as the fourth utility. Compressed air is convenient, versatile, and expensive. It is estimated that in a typical compressed air system over a 5 year period, 86 percent of the total cost is for energy consumed, 8 percent for capital, and 6 percent for maintenance. With energy costs rising to unprecedented levels, energy efficiency in a compressor package is of major importance when evaluating your compressed air system. |
The Supply Side is not Easily Matched to the Demand Side |
N/A Your compressed air system has a huge impact on your plant's productivity and profitability. System design and compressor choices are important decisions with long lasting implications for your business. The wrong air system or components is costly - in the form of excess energy consumption, elevated repair and maintenance costs, downtime, poor compressed air quality, unacceptable noise levels and more. You should consider the impact your selection decision will have on the issues. |
GD Two-Stage Variable Speed Compressors do Both - The Smarter Solution |
N/A Two-stage compression is 8 - 12% more efficient than single-stage compression. Gardner Denver™'s new two-stage VST Series™ is a more efficient air compressor than other single and two-stage compressors on the market today. The VST Series™ compressor matches the compressor output (Supply Side) to the system requirements (Demand Side) at the required target pressure. The Gardner Denver™ VST out-performs other base load and other variable speed compressors. We provide the lowest energy cost and the widest operating range of any other compressor. With the variability found in most plant air systems and the ever-escalating cost of energy today, our VST product is the Smarter Solution. The VST offers a reliable and stable air supply at the lowest energy cost. |
Great Efficiency at Full Load |
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The VST Series™ compressor performs at a specific power level (kW/100 CFM) that is equal to, and in most cases better than, non-drive, two-stage competitive packages. Technology Leads The Way Our design team utilized the latest technologies in developing the VST Series™ with the critical product benefits you require. These technologies include:
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Huge Savings at Part Load |
N/A The VST Series™ provides tremendous power savings at part load points that save you thousands of dollars in energy costs each year. This compressor matches the supply of compressed air at the specified target pressure to your system's specific demand while minimizing the power required to compress the air. Typical compressors either modulate the inlet valve and/or vary the displacement of the first stage to control the capacity of the package. These methods do not offer the power savings of a variable speed control matched to the most efficient compressors nor are they able to achieve the wide operating range of the VST Series™ products. |
The Benefit |
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Efficient, Reliable, Flexible…Unmistakable The VST Series™ is a complete and revolutionary compressor package that is a Smarter Solution to your Complex Needs. The efficiency limitations of single-stage and two-stage compressors have been eliminated to establish a new standard in performance. The flexibility of the Gardner Denver™ VST Series™ exceeds any other compressor on the market today. This means stable pressure in the plant and maximum productivity at the lowest possible electrical cost. Finally, the VST Series™ is so reliable it is backed by the most comprehensive warranty in the industry. |
Evaluate Efficiency - Full Load, Part Load, No Load |
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Upper Range - Part Load Efficiency Gains Importance At full load, the VST Series™ compressor performance is equal to or better than other single-stage and two-stage compressors. As air demand decreases, the VST compressor becomes more energy efficient under part load conditions while other modulating units continue to consume virtually the same amount of energy to compress smaller amounts of air. Middle Range - VST Takes Charge In the middle range the, VST Series™ compressor offers significant energy savings compared to the other compressor types. The VST compressor offers up to 61% better energy efficiency than other compressor manufacturers, and the advantage increases as flow demand decreases. Lower Range - VST is Far Superior In the lower range the, VST compressor energy savings becomes even greater. The VST compressor can efficiently handle the varying demands of today's air systems over multiple shift operations, saving thousands of dollars in energy cost every year, and resulting in the quickest possible return on investment. |
The VS Series™ Provides Efficiency - Full Load, Part Load, No Load |
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Typical competitive variable speed single-stage and two-stage compressors are not designed to maximize performance. Most manufacturers simply adapt their current products to a variable speed drive and motor. Gardner Denver™'s objective is to design the compressor, drive and motor to compliment one another resulting in the best possible energy savings over the entire operating range of the compressor. The VST Series™ products are specifically designed to meet this objective. To Maximize Efficiency, the VST Series™ Eliminates Every Possible kW. Newly Designed air ends perform efficiently at all speeds Unlimited Start/Stop Operation When air is not needed, the VST Series™ compressors stop running and do not vent to atmosphere. We do not see the need to waste the compressed air in the reservoir. The "soft" starting capability of the AirSmart™ controller allows the motor to start against a pressurized system at any time and will do so as often as required by the system. Our attention to this energy saving detail saves you energy costs. air ends Optimized for Variable Speed Operation Gardner Denver™ invested the capital to develop new air ends with new rotor profiles for the specific purpose of maximizing energy efficiency in two-stage variable speed compressors. We invested in variable speed technology rather than the conventional gear driven air ends. We see this as the future of rotary screw compressors. This technology allows us to synchronize the speeds and performance of the first and second stage air ends, to optimize the performance and energy efficiency throughout the operating range of the package. Designed for Minimum Pressure Drop For every 2 psig of pressure drop through a compressor package an additional 1% of power is consumed. Gardner Denver™ analyzed every facet of the compressed air stream to eliminate or minimize pressure drop. CFD analysis allowed us to model the airflow through the system and eliminate any restrictions. Our attention to detail saves you energy costs. More Models to Choose from We offer the widest range of two-stage models of any manufacturer in the industry. Our model range begins at 55 kW (75 horsepower) and expands to 260 kW (350 horsepower). This results in the best possible match of our two-stage compressors to your needs and the best value for your application. These compressors will turn down to 20% of their rated capacity. This allows you the flexibility to meet the diverse variability of your plant's requirements while preserving the best possible energy efficiency. |
Flexibility to Surpass Your Goals |
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Capability to Meet Varying Compressed Air Demands
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Reliability to Maximize Uptime |
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Designed for Reliability We used a "clean sheet of paper" design approach, with all components carefully selected and tested for their specific performance and purpose. The VST Series™ design incorporates stepped-injection technology. This allows the AirSmart™ controller to maintain the discharge temperature of the compressor above the dew point to prevent condensate from forming in the lubricant. Smart! Gardner Denver™ designed the first and second stage compressors as independent compressors and drives. This choice allows the AirSmart™ controller to synchronize the second stage compressor speed to the exact needs of the first stage - optimizing the input power of the package. The result is the most efficient supply of compressed air to your system demand at the lowest possible energy cost. Reliability and efficiency have been designed into each component in this system to assure you maximum performance and dependability. A Warranty Like No Other In simple terms, VST Series™ compressors have a best-in-class warranty. A five-year warranty is available for the drive motor, airend, variable frequency drive, controller and more. With regular lubricant sampling and use of OEM parts & lubricant you are guaranteed to have a compressor that exceeds your reliability expectations. |
The AirSmart™ Controller Orchestrating your Compressed Air System |
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Simplicity The AirSmart™ Controller was designed to make the operator interface with the variable speed drive transparent. You don't need to be an expert on variable speed drives to operate our compressor. The controller takes care of the details. The controller automatically adjusts the compressor's performance to meet your changing air system demands - saving you energy dollars. Changing the discharge pressure is as easy as pressing a button. No longer is there a need for a new machine when your pressure demands change. Communication and Sequencing The optional communication module allows the VST Series™ units to talk to each other and other Gardner Denver™ compressors to optimize system efficiency. This isn't just an hour-balancing, on/off sequencing scheme. Our controller allows the system to truly optimize efficiency because it knows the capabilities of other machines and orchestrates their operation. The communication module also allows remote monitoring of the VST units. Advanced Display The controller has a four line display with menus and tactile buttons for easy navigation. Two lines display operating information such as pressure, temperature, operating hours, etc., while the other two lines display advisory messages, shutdown messages, recommended part numbers, and service contact information. |
Energy Efficient at All Load Levels |
N/A The single largest "cost" item, during the life of a compressor is the cost of the electricity required to run the compressor. With esaver, the Gardner Denver™ Rotary Screw Energy Cost Calculator, no matter what load demand, the cost of the electricity used by a compressor can be calculated. Ask your local Gardner Denver™ Authorized Distributor to demonstrate this unique cost-saving tool. |
Making Your Job Easier |
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Environment Serviceable Yet Compact Footprint Our entire VST line was designed with a compact footprint for space-saving, money-saving installation. Super Low Sound All VST models are enclosed for quiet, environmentally friendly, and employee-friendly operation. Gardner Denver™, an Energy Star Partner, is committed to developing products and introducing technologies that help conserve energy and protect the environment. Serviceability and Product Support Serviceability Great attention was given during the design of the VST line to ensure that our compressors are easy to service and maintain. Support Network Gardner Denver™ has a network of trained service providers available whenever needed to keep your compressors in top form. We are committed to stocking components to support your compressed air system needs. Aftermarket Products Gardner Denver™ carries a full line of aftermarket products to meet your full system needs. Designed to deliver Smarter Solutions™ for your complex needs! |
ESP 20/20 |
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Single Compressor Remote Monitoring ESP 20/20 is a wireless remote monitoring solution that upgrades the air compressor to an intelligent asset providing system performance and advisory notification. Interfacing directly to Gardner Denver™ or third party compressors via discrete inputs and outputs, any compressor asset can be transformed to provide critical operational information through a single web-based application. |
Wireless |
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Installation Has Never Been Easier One of the unique features of ESP 20/20 remote monitoring is wireless access to the compressor. This feature is only offered by Gardner Denver™'s ESP 20/20 and provides significant advantages over IP/Network or RS232/Serial based systems.
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Enterprise/Web Based Solution |
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Anytime, Anywhere Access ESP 20/20 is an enterprise web-based solution, a Gardner Denver™ exclusive feature, which provides substantial advantages over peer to peer solutions offered in most competitive products.
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