Product
Product
Supplier
Search
Get Quote
730 people are quoting
The 150HP two stage screw compressor with VSD is ordered for the pressure band more than for the horsepower. Two stages split the compression so neither carries the full ratio, and the drive keeps the pair turning at the speed the plant is using instead of cycling between loaded and unloaded. Model SAD-110: 110 kW (150 HP), 0.8 to 1.3 MPa (8 to 13 bar), 24.5 to 18 m³/min (865 to 636 CFM), direct drive and air cooled.
Splitting the compression into two stages changes the numbers each stage works with. The first stage raises the air to an intermediate pressure, the intercooler takes the heat of that stage out of the air before the second stage sees it, and the second stage finishes the job from a cooler, denser starting point. Each stage then carries a lower pressure ratio than a single stage machine would need for the same discharge pressure, and a lower ratio means less internal leakage past the rotors and less heat in the oil. That is what separates a double stage air compressor from a single stage machine of the same power on a duty that runs long hours: the air leaves cooler, and the element keeps more of what it took in.
The drive is the second half of the arrangement. A fixed speed machine turns at one speed and unloads when the receiver is full; in the unload state the element still turns and the motor still draws, so the hours a plant spends below full demand are paid for whether the air is used or not. A vsd screw compressor runs at the speed the demand asks for, so those hours are spent at part speed and part power. On a duty that sits at 60 or 70 percent of capacity for a ten hour shift, that band is where most of the difference is found.
The motor is a permanent magnet synchronous type, run by the drive. There is no field winding to excite, so there is no excitation current to lose, and the rotor does not fall away in efficiency as its speed drops the way an induction motor does off its design point. Paired with a two stage airend, whose advantage sits in the rotors rather than in the control, the two effects work on different parts of the same problem. Against a single stage variable speed machine of the same power, the SAD series is rated at 10 to 15 percent less energy for the same air.
The set point is chosen inside the 8 to 13 bar band when the order is placed, and the flow figures follow it: 24.5 m³/min (865 CFM) at 8 bar, falling to 18 m³/min (636 CFM) at 13 bar. A plant that works at 8 bar gets the full output, and a plant that needs 13 bar for a process step gets a machine built for that band rather than a standard 8 bar unit pushed past its design point. Buyers comparing this machine against an 800 cfm air compressor listed elsewhere should check the pressure the figure is quoted at. The number that matters is the one at your working pressure, and we will confirm both before the order is placed.
Two stage compression earns its cost on long shifts near full output. That is why it turns up in plants that never shut the compressor down: textiles, cement, glass, bottling, general works. Where demand swings wide and sits low for most of the day, the second stage does not pay for itself. On that duty a single stage permanent magnet machine at the same power is the cheaper way in. Consumables are the standard set for a screw machine: air filter, oil, oil filter and separator, all from the same service parts range.
Model SAD-110: a 110 kW (150 HP) two stage rotary screw compressor with a HANBELL two stage airend, a permanent magnet motor and a variable speed drive, direct drive and air cooled. Working pressure is set between 0.8 and 1.3 MPa (8 to 13 bar) at the time of order. Free air delivery is 24.5 to 18 m³/min (865 to 636 CFM), dimensions are 2300 × 1620 × 1860 mm, weight is 3360 kg, and the standard supply is 380 V three phase 50 Hz, customizable.
They work on different things. The airend lowers the pressure ratio each stage has to carry, which cuts leakage and heat at the element. The drive lowers the speed when demand falls, which removes the unload band a fixed speed machine pays for whenever the receiver is full. On a plant running two shifts below full capacity, both are working at once: the element is doing less work per cubic metre and the machine is turning only as fast as it needs to.
The SAD series is rated at 10 to 15 percent less energy than a single stage variable speed machine of the same power, at the same air volume and pressure. How much of that you see depends on your duty. Two stage pays back fastest where the machine runs long hours near full output at the higher end of the pressure range; on a light, intermittent duty the gap narrows and the extra purchase cost takes longer to return.
Anything from 8 to 13 bar, and it is set before the machine ships. The trade is output against pressure: at 8 bar the machine delivers 24.5 m³/min (865 CFM), and at 13 bar it delivers 18 m³/min (636 CFM). Order the pressure your process actually needs at the far end of the line rather than the pressure stamped on the compressor, and let us know if a step in your process needs more than the rest of the plant.
Yes. SAD is the two stage permanent magnet variable frequency series, and the motor is a permanent magnet synchronous type run by a drive rather than a fixed speed motor with a star delta starter. The airend is a HANBELL two stage unit, that is, one low pressure stage and one high pressure stage with an intercooler between them.
An air cooled machine, so no cooling water circuit. The base is 2300 × 1620 mm overall, 1860 mm high, and the unit weighs 3360 kg. The standard build is 380 V three phase 50 Hz, and other voltages and 60 Hz networks are built to order. Plan the receiver and the main line against your peaks, since at 865 CFM the stored volume carries a real share of a short peak.
If you are interested in the product, contact 2bvideo.com for more information for more information
The information of 2bvideo.com limited shown above is provided by the user or collected on the network. Video 2B does not guarantee the authenticity,accuracy and legitimacy of 2bvideo.com limited information. Video 2B does not involve legal relationships and disputes between users arising from transactions other than secured transactions on this website. Disputes shall be settled by you through negotiation. If you are the person in charge or relevant employee of this enterprise, if you find that the enterprise information is incorrect or want to manage thiscompany, please contact us jacklee1558@gmail.com, after you claim the enterprise, you can obtain management permission, publish supplyand demand information, bring consulting orders, and remove page advertisements.
Main Product:
Air Compressor,
PM VSD Screw Air Compressor,
Air Tank,
Air Compressor Parts ,
Air Dryer,
Precision Filter
