Our award winning Nx series two-stage rotary screw air compressor has been ranked as the most efficient air compressor on earth! The unique features of the NxHe ensure that companies continue quality production in a cost efficient and timely manner. Not only is the NxHe designed to extend its component's life, but it's also energy saving and eco-friendly. These are only a few of the NxHe series key features.
Designed to save you money, the NxHe allows for easy service and little down time. This helpful design includes:
- Easy-to-maintain oil separator
- Sealed end face to prevent leakage
- Independently bearing lubrication
- O-ring face connections to prevent leaks
- Two stage motors in one airend
- eCOOL Technology
Compared to single stage compressors, a two-stage is much closer to isothermal compression. This is achieved by injecting fresh oil between the stages, which reduces the inlet temperature to the second stage. This lower inlet temperature increases efficiency by reducing the compression ratio between the stages. In addition, leakage between the rotor seals is significantly reduced resulting in outstanding volumetric efficiency.
The ultimate in system protection and reliability. This technology helps reduce thermal stress on your air compressor by:
- Maximizing cooling airflow by removing hot air from above
- Protects critical components from compressor-generated heat
- Compartmentalized air flow design and oversized aftercooler
- Extends component life and reduces downtime
This feature offers a full-color screen graphic display to help track and capture real-time data on your NxHe compressor. This tool also helps track:
- The air quality of your compressor
- How long the machine has been off, running or on standby
- Filter quality with replacement or maintenance schedules
- Air and oil curcuits
- Oil temperature
- Pressure variations
The Nx Series offers a space-saving profile that’s easy to install while accommodating for limited floor space. The integrated separator, MPV and thermostatic valve reduce connections by up to 90% -- meaning fewer opportunities for leaks. The series also comes in variable speed drive from 8-90kw for even more efficiency and energy saving opportunities. The FS-Curtis Nx Series combines efficient operations with outstanding durability, which is the perfect combination for automotive, light industrial, and other applications that require reliable performance in demanding conditions.
Learn more about this Plant Engineering 2015 & 2016 Product of the Year https://us.fscurtis.com/product-catego...
The mission of FS-Curtis has always been about the people. Some Companies are founded on hard work others are founded on ideals. FS-Curtis was founded on both. FS-Curtis is the best in reciprocating, rotary, and oil-free compressors. Assembled in St. Louis since 1854.
Compressed Air is an integral part of the Fabricated Metals Industry. Premier Tool Grinding manufacturer of carbide cutting tools uses our NxB22 along with our RNE Dryer and CF Filtration system. See how we assist companies like Premier Tool in the Fabricated Metals Industry.
Many processes and applications continue to use inefficient devices to deliver the compressed air, and many companies fail to recognize the simple implementation and significant payoff of improving compressed air efficiency.
Improving compressed air efficiency, or saving more of your compressed air capacity by minimizing compressed air demand, can be realized by following some simple procedures. Though there are many actions that can be taken to further improve compressed air efficiency, some simple and effective steps can be put to action quickly.
A few things you need to do to improve the demand of your air compression: Measure the air consumption to identify sources that waste compressed air Find and fix the leaks in your compressed air system. Upgrade your blow off, cooling and drying operations using engineered compressed air products. Use intermediate storage of compressed air near the point of use Control the operating air pressure at the point of use to minimize air consumption.
Why not take your compressed air to the next level by seeing the services and products that FS-Curtis can offer?
Fs-Curtis has won Plant Engineering's Product of the Year for the 2nd year in a row! The NxD45-90kW won over other compressor manufacturers. This award is noteworthy because of our customers and people within our industry vote for the best product. We could not have done this without the hard work and dedication of our FS-Curtis team and the support of our global team.
The Nx Series offers a space-saving profile that’s easy to install while accommodating limited floor space. The integrated separator, MPV, and thermostatic valve reduce connections by up to 90% -- meaning fewer opportunities for leaks. The Nx series also comes in variable speed drive for 8-90kW for even more efficiency and energy savings opportunities.
Energy Efficiency & Quality Components
Built to the highest levels of dependability, reliability & efficiency
- Premium Efficiency TEFC (IP55 Class F) motor protects compressor from harsh environment
- IE3 Motors increase efficiency
- NEMA-1 electric panel
- Wye-Delta motor starter
- Hi-Efficiency air/oil separator with 1-3 ppm carryover
- 120 volt control voltage
- 100% continuous duty cycle, pulsation free air
- Energy efficient oversized cooler
- Built-in heavy duty air intake filter
- Additional heavy duty oil filter for added protection of airend bearings
- Durable powder-coat painted enclosure
- Leak-free design with o-ring seal fittings & hoses
Learn more about the award-winning NX series and why it is a bonafide winner!!
What do you consider when purchasing a rotary air compressor? Let’s say you buy a Volvo, arguably considered one of the safest cars on the road, and you drive it 70 mph into a brick wall (by the way, don’t do this, it ruins the paint job), is it the car’s fault that it may no longer run?
The same scenario applies to equipment. If the OEMs installation recommendations are not adhered to, there will be a high degree of probability that the compressed air equipment will not be reliable, will not experience the stated longevity, may require above average maintenance, may consume more electrical energy than required and may not consistently provide the compressed air quality required for production.
While it’s impossible to cover all of the things you need to consider when installing a rotary air compressor (and we hope it’s an FS-Curtis), this short article is intended to help avoid the equivalent of driving your car into a brick wall.
1) Have your system voltage measured. The most common electrical utility voltages in the United States are 200 volt, 208 volt, 230 volt, 460 volt. Electrical utilities guarantee a voltage supply tolerance of + 10%. For example, if the voltage stated supply is 230 volts it could measure at any given time from 207 up to 243 volts. Most electrical utilities attempt to hold the supply voltage to + 5%. Operating electrical motors off design or away from their nameplate voltage will generate additional heat leading to reduced motor life expectancy. The majority of induction motors, 5 hp through 600 hp supplied to the U.S. market, are 230 & 460 volts; however, 200 & 208 volt systems are becoming more popular. If a 230 volt name plated motor is operated on a 200 to 208 volt system it will operate in an elevated heated condition leading to extremely reduced motor life. This is not a recommended practice. There are motors specifically designed for 200 & 208 volt operation. For these applications, motors name plated as such should be used.
2) Many air compressors operate into the motor service factor. As such, request the package full load operating amp draw from the manufacturer to properly size the electrical utility supply equipment (i.e., wire, electrical quick disconnect, overloads, transformers). Seek out a qualified electrical contractor in your area to assist in proper electrical utility modeling and sizing.
1) Proper placement and mounting is vital. Request a General Arrangement (GA) drawing from the OEM for each piece of compressed air equipment purchased. The GA drawing should illustrate the weight and recommended clearances to be maintained around the equipment. The floor will need to support the static weight of each piece of equipment. The equipment should be secured to the floor to prevent it from shifting around imparting stress on connected utilities such as piping, electrical and ducting. In addition, many states have adopted seismic codes mandating equipment be structurally secured to the floor. Many floors appear flat to the eye but are not flat enough to meet accepted equipment mounting practices. Many floors can be crowned (bowed) or have undulations. When securing equipment to a floor it is important to identify floor imperfections filling the air gaps with shims. When properly shimmed, the tightening of the mounting bolts will not bend or distort the equipment frame. Frame distortion will lead to excessive equipment vibration. Excessive vibration causes premature component failure which reduces machine reliability, increases the cost of ownership and could potentially create an unsafe situation.
Proper clearances should be adhered to. These recommended clearances provide boundary area around the machine for safe, effective operation and servicing of the machine. This boundary area also allows adequate cooling airflow around the machine.
All piping should be properly supported as to not impart stress on the equipment. When connecting piping to the equipment pipe connector, it should be supported with proper tooling to prevent the equipment connector from turning during the piping tightening process. If the equipment receiving connector is allowed to rotate it very well could damage internal components to the equipment. Air piping should be properly sized and configured to prevent short cycling of the air compressor controls. A rule of thumb is to always use piping at least the size of the supply connection. If the dryer connections are larger don’t worry, the reason could be that the dryer is over sized due to rerating or simply the fittings are larger to slow down the compressed air velocity through the dryer. The piping exiting the dryer can be the same size as the air compressor connection or the outlet of the dryer, which can be used to establish the piping downstream of the dryer.
If the ambient air conditions can drop below 32°F measures should be taken to prevent the compressed air equipment from being exposed to this as it will freeze. During air compressor operation the most effective way to condition the room temperature is to use the heat generated by the operating air compressor(s). Excessive heat can be discharged from the room by way of a properly sized wall fan. The wall fan can be thermostatically controlled to keep the room at a constant temperature. If there are times when all of the compressed air equipment is not operating, an auxiliary heating system should be considered.
Air-cooled rotary screw air compressors give off 2545 BTUs/hr per horsepower.
Example: A 50 horsepower air-cooled rotary screw air compressor discharges 127,250 btus/hr into its surrounding environment.
That is enough heat to keep a 1500 square foot home comfortable in the dead of winter with outdoor temperatures below 32°F. Many of these air compressors are installed with little thought of eliminating heat build-up around the air compressor. The heat discharged into the ambient air surrounding the air compressor is continuously cycled through the heat exchangers elevating the temperature. Unchecked, the temperature will rise to an unacceptable level, eventually overheating the air compressor & shutting it down. Ducting can be attached to the air compressor to directly route the cooling air discharge outdoors or away from the rotary air compressor. Wall or ceiling fans can also be strategically placed in the room to exhaust the hot cooling air outside. Either way, an adequate amount of replacement cooling air must be brought into the room.
All installations have contaminants in the ambient air. Contaminants can negatively impact an air compressor in many ways, two of which are indigestion into the air compressor itself and or fouling of the air-cooled heat exchangers. The best way to determine if the air compressor is digesting an abnormally high amount of contaminants is to frequently perform oil analysis. The oil analysis should find components not normally part of the oil make-up.
In the case of a lubricated rotary air compressor, all of the ambient air drawn into the machine for compression flows right past or through the airend bearings. Too much ingestion of particulate will damage the bearings. The oil not only cools the air during compression, but it also washes the contaminants out of the air. Over time these contaminants will build up continuing to be cycled through the bearings.
Example: A 10 micron particle should be able to flow through an anti friction bearing suspended in the oil film without damaging the bearing surfaces.
This doesn't account for multiple particles clumping together, which will damage the bearing surfaces. Two solutions for reducing digestion of contaminants are to install an air filter with a lower micron rating and higher efficiency rating. The ratings should be adjusted until the oil analysis indicates the level of contaminants is satisfactory. Remember, as the rating of the inlet air filter is increased the surface area should also be increased or the air filter may have to be changed out too frequently from excessive fouling. The second solution is to relocate the inlet air filter to a remote environment, which is cleaner than the immediate area around the air compressor. The piping used to remotely mount the air filter should be non-ferrous. PVC works great as it is light, easy to assemble and inexpensive. Connect it to the air compressor airend with an easily removable joint in case machine repairs or troubleshooting is required. The piping i.d. should be no smaller than the i.d. opening in the OEM supplied inlet filter mounting assembly. For every 10 feet of inlet pipe run, the pipe diameter should increase one size or 1". If the inlet air filter is relocated outdoors it should be protected from digestion of rain or snow.
Relocation of the inlet air filter is a recommended solution when the surrounding area around the air compressor contains hazardous vapors or fumes. There are air filters, which can remove hazardous fumes or vapors; however, they are costly to purchase and maintain.
If you have questions or would like more information or pricing, please visit our Distributor Lookup page on our website to locate a distributor in your area.
A Variable Speed Drive compressor sounds like a smart idea, but is it really?
Let’s address the rotary compressor question that auto care facilities ask us on a regular basis: Should I spend the extra money to put an energy-saving Variable Speed Drive (aka: Variable Frequency Drive) rotary screw compressor in my facility? The short answer to this question is: probably not.
The folks asking this question have heard that VSD/VFD machines may cost more up front but that they cost less to run and thus pay for themselves in the long run. In addition, many utility companies offer rebates for VSD/VFD machines that can help offset the larger up-front cost. Just like everyone else, automotive care facilities want to save money and energy, so this supposed value proposition sounds attractive. Right?
So why then is VSD/VFD probably not a good idea for most automotive care facilities? The short answer is that most automotive care facilities typically have severe peaks and valleys in their compressed air usage due to the intermittent use of tools and equipment in the shop. This in itself does not rule out VSD/VFD. In fact, VSD/VFD is ideal for customers whose demand fluctuates, provided that it does not fluctuate too much. The problem with auto care facilities is that their valleys are too deep. Too much downtime. The rule of thumb is that when the valleys are 30% or less of the peaks, the compressor will have to shut down, essentially forcing it to run as a start/stop machine. There are several issues with running a VSD/VFD machine in this type of application:
- More expensive – First of all, the customer is paying a 30% or more premium for a VSD/VFD machine to run just like a cheaper start/stop fixed speed machine. Perhaps the more important comparison is that the customer would be paying a whopping 70% premium compared to a fully-loaded UltraPack recip, which is probably the best application in most auto care shops.
- Phantom Energy Savings – VSD/VFD machines are ideal for loads somewhere between 30 and 80 percent of full load. There are little to no energy savings otherwise. Even though very short payback periods are often cited, these are for machines in ideal scenarios with exactly the right load profile. Auto care facilities very seldom have an appropriate load profile. If one isn’t going to get the benefit of the VSD/VFD, why pay extra for it, and risk some of the potential headaches outlined below?
- Increased Maintenance -
o VSD/VFD’s require minimal incremental maintenance on the drive compared to standard fixed speed machines. These increased costs should be considered in any decision to go with a variable speed machine.
o VSD/VFD’s require a cleaner environment for the sensitive electronics of the drive. This can lead to increased maintenance costs and possibly drive replacement, which is very expensive. If the machine is going to be placed in a shop with dust and other contaminants floating in the air, then the cost of protecting the drive from these contaminants, or paying extra for maintenance and/or replacement, must be considered.
The bottom line is that most auto care applications are not ideal for VSD/VFD machines. The severe valleys in demand profiles mean there probably won’t be energy savings to offset the increased acquisition and maintenance/replacement costs. In addition, most shops are too dirty to install a VSD/VFD without increased risk and cost.
St Louis, MO, May 4, 2016– FS-Curtis/Curtis-Toledo, Inc., a leading manufacturer of reciprocating and rotary air compressors since 1854 has announced that their Nx Series of Rotary Air Compressors has been awarded the prestigious Plant Engineering Product of the Year GOLD Award.
The Nx series rotary-screw air compressor features the iCommand-Touch controller—an intelligent technology that features touchscreen capabilities with bright, full-color graphics. At a glance, users can track pressure, temperature, and usage to easily diagnose and optimize their facility’s air system. The controller graphs information and trends that can be downloaded to an SD card, for troubleshooting and quality control measures. Customers have provided praise regarding the innovative Nx series intelligent package design, which easily allows simple maintenance tasks. The unique design of the motor and fan, coupled with airflow baffling and superior sound insulation, ensures extremely quiet operation. So quiet, the unit can be installed where you need it the most.
“Trusted and dependable reaches a whole new level with our Nx series rotary screw air compressors. The overwhelmingly positive response from customers highlights the quality of the air compressor, which is further reflected in the Nx being selected as the Gold Winner from Plant Engineering,” said Matt Smith, National Sales Director, FS-Curtis. “The entire FS-Curtis team continues to be focused on providing customers with trusted and dependable compressed air solutions that exceed their expectations.”
Plant Engineering's Product of the Year program is a premier award for new products in the manufacturing industry. The annual reader-choice program provides Plant Engineering's audience with information about the top new products in their fields.
About FS-Curtis/CURTIS-TOLEDO, Inc.
Since 1854, FS-Curtis/CURTIS-TOLEDO, Inc. has been designing and manufacturing solutions for industry. The FS-Curtis Air Compressors brand continues to be the symbol of quality and excellence in the design and manufacture of air compressors. Dedicated to customers and loyal distributors, our brand names are synonymous with Legendary Reliability since 1854. FS-Curtis/Curtis-Toledo, Inc. is proud to be ISO 9001:2008 and ISO 14001:2004 certified.
If you would like more information about this product, please visit www.fscurtis.com or contact Natalie Fontana at 314.383.1300 or email at Info@FSCURTIS.com.
On our path to becoming the most trusted and dependable compressed air equipment provider in North America, we at FS-Curtis have just taken another major step forward. FS-Curtis is proud to announce the newest addition to our Nx Rotary Screw Air Compressor Series.
The Nx18-37 kW (25-50 hp), is now available in Variable Speed Drive! The NxV 18-37kW variable speed drive compressors are built on the same reliable platform as the fixed speed product introduced earlier this year. These compressors are controlled by a variable speed drive to match energy consumption to demand, they utilize a robust direct drive arrangement, and the iCommand Touch controller is now standard on the 18-37 kW Variable Speed Drive units at no additional charge. With the standard iCommand-Touch, a full-color screen displays graphs which capture and track factual, real-time air usage by the hour, day, week and month. Historical data can be retrieved at any time with a touch of the screen. The data trending keeps your finger on the pulse of your entire compressed air system.
Introducing this new addition to the FS-Curtis Rotary Screw lineup continues to show that through the dependability of our people and our quality-focused manufacturing, we are a trusted name serving even more markets through our ever-growing global presence.
In order to help us grow in our mission, we welcome your feedback to help us improve and exceed your expectations.
The FS-Curtis Sales and Marketing Teams