Screw Air Compressor

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Single screw air compressor/Integrated laser cutting screw air compressor/Box laser cutting screw air compressor/Refrigeration dryer (air-cooled)/High temperature detached core refrigeration dryer/Modular non heat regeneration adsorption dryer/Laser cutting air compressor dedicated filter/Air storage tank.

One-stop solution
According to the development of the laser company, we have developed a high-pressure piston machine and a screw-mounted machine that are easy to install and transport. The oil and dust content at the end of the machine meets the gas requirements of the laser machine, providing customers with a one-stop electrostatic dust removal solution.

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Factory high standard debugging and quality inspection, precision instrument testing, British Michel moisture content testing instrument, German CS oil content testing instrument.

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What is Screw Air Compressor

Screw Air Compressor are by nature of their compression technology energy efficient. Because energy costs make up the bulk of the expenses related to compressing air, this makes them a great investment.In addition, screw compressors are built specifically for long lifetimes of reliable use. That makes them a great choice for operations that require (close to) continuous compressor operation.Other advantages include that rotary screw air compressors do not require a lot of maintenance and are very versatile. In addition, they are relatively quiet. That means that screw compressors can be installed closer to the point of use without violating noise standards. This is important for workshops or other small businesses with limited space.

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Benefits of Screw Air Compressor

Safe and Convenient
Screw Air Compressor are incredibly convenient, given that they deliver air continuously for the required purposes. They are also safe, and cases of accidents with the machines are almost unheard of.

Functions at extreme weather conditions
Screw Air Compressor can work at high temperatures or in low conditions to your convenience. The machines can also work in areas where other forms of energy are prohibited due to safety or temperatures levels. Our rotary screw compressors run continuously, and this continuous duty function means that the rotary screw compressor can run all day, in all conditions without wearing out crucial components of the machine.

They are designed to run tools that generate more power that typical equipment
And since their air flow rates are extremely high, Screw Air Compressor can power such equipment effectively.

They are easier to maintain
Many of the modern air compressors in the market have fewer parts that require maintenance. In fact, some rotary screw machines have up to 70% less of parts, which in turn lowers maintenance costs dramatically. Although easier to maintain, they do still need maintenance and as long as you keep with a rotary screw maintenance schedule, you will likely be rewarded with many years of optimal productivity from your machine.

They run quietly despite their massive air flow
Screw Air Compressor are generally quiet performers, with many of them having noise dampening technologies. That and the fact that they are not huge in size makes them convenient to be stored anywhere and till provide a safe working environment. Many rotary screw compressors are barely louder than a dishwasher, so you can still have conversations in your compressor room, and not feel like you have to yell over the noise.

They are good energy conservers
Rotary screw machines are generally energy efficient, and they generate less heat than normal air compressors.

Types of Screw Air Compressor

Oil-free compressor
Modern, high-speed, oil-free screw compressors have asymmetric screw profiles. This arrangement results in significantly improved energy efficiency from reduced internal leakage.External gears are most often used to synchronize the position of the counter-rotating rotors. As the rotors don't come into contact with each other, nor with the compressor housing, no lubrication is required inside the compression chamber. Consequently, the compressed air is completely oil-free.

Oil-lubricated compressor
One variant is known as an oil-flooded compressor or an oil-injected compressor. The technical name, however, is oil-lubricated.Oil-lubricated rotary screw compressors inject oil into the compression chamber. This oil cools and lubricates the compressor element, helping remove heat while minimizing leakage in the compression chamber.Oil-lubricated screw compressor elements can be manufactured for high-pressure ratios. One compression stage is usually sufficient for pressures up to 14 bar, and sometimes 17 bar, albeit at the expense of energy efficiency.

Fixed speed compressors
Fixed speed compressors are very efficient when continuously operating at 100% capacity, but most facilities don't require that amount of productivity. Before the motor comes to a complete stop, it will continue to run while no air is being produced, consequently wasting energy and money.Such inefficiency and waste is generally found at facilities operating multiple shifts and experiencing flow demand fluctuation throughout the day.

Variable speed drive compressors (VSD)
VSD compressors increase the speed of the motor as the need for air increases, thus supplying more flow/CFM. If the demand decreases, the motor will automatically slow down and only use the required energy to provide appropriate flow.On slow production days, breaks in workflow, or throughout second and third skeleton shifts, VSD technology is especially handy. This type of air compressor saves electricity and money, compared to fixed-speed models.

Application of Screw Air Compressor

22kw High Pressure Screw Air Compressor With Air Tank

China Screw Air Compressor Laser Cutting

15kw Screw Air Compressor For Laser Cutting

Manufacturing and Industrial Settings
One of the most common applications for rotary screw air compressors is in manufacturing and industrial settings. These powerful machines are used to power a variety of tools and equipment, including drills, grinders, and nail guns. The steady, reliable source of compressed air provided by rotary screw air compressors is essential to maintaining productivity and efficiency in these environments.

Construction Industry
In addition to the manufacturing industry, rotary screw air compressors are also widely used in the construction industry. From powering pneumatic picks and drills to providing compressed air for sandblasting equipment, these versatile machines play a vital role in ensuring that construction projects proceed smoothly.

Automotive Industry
Another important application for rotary screw air compressors is the automotive industry. These machines are used to power a variety of pneumatic tools, such as impact wrenches and pneumatic ratchets, which are essential for tasks such as changing tires and servicing engines. In addition, rotary screw air compressors are used in automotive painting and finishing processes to provide clean, dry air to spray guns and other paint spraying equipment.

Healthcare Industry
Screw air compressors also play an important role in the healthcare industry, where they are used to provide a compressed air source for medical equipment such as ventilators and anesthesia machines. The reliable and consistent performance of these machines is essential to ensuring the safety and health of patients in hospitals and healthcare facilities.

Food and Beverage Industry
The food and beverage industry also relies heavily on rotary screw air compressors, especially when it comes to food production and packaging. These machines are used to provide clean, oil-free compressed air for tasks such as filling and sealing containers, as well as to power pneumatic conveyors and other equipment used in food processing and packaging facilities.

Pharmaceutical Industry
In the pharmaceutical industry, rotary screw air compressors are used to provide a reliable source of compressed air for a variety of applications, including powering pneumatic tools and equipment used in the manufacturing process. In addition, these machines are used to provide clean, dry air for tasks such as tablet coating and packaging in pharmaceutical production facilities.

Energy Sector
Rotary screw air compressors are also an essential component in the energy sector, used for tasks such as natural gas and oil exploration and production, and power generation facilities. These machines provide a reliable source of compressed air for a variety of applications, including powering pneumatic drilling equipment and providing clean, dry air for turbine control systems.

Components of Screw Air Compressor

Air-End (Pump)
The air-end is where the work of air compression happens inside the rotary screw air compressor. The air-end consists of several component parts.

Motor and Control System
A rotary screw air compressor must have several other components in addition to the air-end.Air Compressor Motor: The compressor motor powers the rotation of the rotors. The motor may be fixed-speed or variable-speed.

Air Compressor Filters
Filters keep contaminants out of the air supply. Filters for a rotary screw air compressor may include:Intake filters to remove contaminants from atmospheric air before it enters the air-end.Inline filters to remove particulate and oil from compressed air.Oil filters to remove particulate from liquid oil in oil-lubricated rotary screw air compressors.

Air Compressor Cooling System
Rotary screw air compressors generate a lot of heat during compression. This heat must be dissipated by a cooling system to prevent overheating. An aftercooler acts as a heat exchanger, absorbing heat from the compressed air and carrying it away where it can be dissipated. The aftercooler cools air and removes the majority of the moisture before it goes into the drying system and filters. There are two basic types of air compressor after-coolers: air-cooled and water-cooled.

Oil-Injection System for Rotary Screw Air Compressor
An oil-injected (or oil-flooded) rotary screw air compressor will have additional components as part of the oil injection system.

How to Choose Screw Air Compressor

Selecting the right screw compressor technologies

Rotary screw compressors are a great fit for a wide range of applications. However, to take full advantage of everything they have to offer, it is important to select the right screw compressor technologies.With many different types to choose from, it depends on what rotary screw compressors are used for in your operation.Let's take a look at your different options in screw compressor technologies.

Drive type

First, you have to select the kind of drive you want in your compressor. You can choose between a belt drive, a gear drive or a direct drive.Rotary screw compressors with a belt drive are robust, easy to install and to maintain. These features, in combination with their low investment cost, make them an excellent choice for smaller operations.The use of gear drives allows rotary screw air compressors to operate more quietly. This means they can be installed close to where people are working without violating any noise standards. Although their initial investment cost is higher, compressors with gear drives are more efficient, which reduces their operating costs.

Oil-free or oil-injected?

The next decision is about whether to invest in an oil-injected or an oil-free compressor. In the case of the former, lubricating oil is used to help compress the air. This technology allows users to achieve a higher pressure. In addition, it is more efficient. However, because these pressure compressors introduce oil into the process, the air is less clean.

Fixed speed, variable speed drive or iPM

Energy takes up more than 70% of owning and operating a compressor. Fortunately, Variable Speed Drive (VSD) technology is available to significantly reduce your energy use. Your net result: lower operating costs and a smaller emission footprint.

How Does a Screw Air Compressor Work?

Air enters the compressor through the air intake. (An air intake filter may be needed to keep excess dust, debris, pollen, and dirt out of the compressor.)

Air goes through the regulator valve, which sets the pressure, and is directed into the air end (the rotor housing).

The two enmeshed helical screws or rotors turn rapidly, powered by the air compressor motor. In an oil-flooded compressor, oil is used to create a tight seal between the rotors and the housing walls to trap air within the rotors. In an oil-free compressor, special coatings and seals are used to prevent air leaks.

The revolution of the screws forces air through the chambers. This creates a vacuum, which pulls more air into the chamber through the air compressor air intake.

As air moves through the successive chambers of the paired rotors, it is squeezed into a smaller volume, resulting in air compression.

Compressed air exits the air end unit. Usually, air will go through an aftercooler system to dissipate excess heat and remove some of the moisture from the air. As the air cools, moisture falls out of the air as condensation and is drained away. An oil/water separator is used to remove oil from the liquid water before disposal.

Air exiting the aftercooler unit will typically have to be dried and filtered to remove remaining moisture, oil mists, and particulates. Air dryers and inline filters are used to treat air prior to use or storage.

How to Maintain Screw Air Compressor

Change Air Filters Every 4,000 Hours

Inspect air filters every 2,000 hours and change them every 4,000 hours or per manufacturer's recommendation or service indicators. Air filters remove particulates that enter your compressor's intake, regardless of the air source. Dirty filters increase the pressure drop, making your system less efficient. Even a two-PSIG pressure drop caused by blocked filters will raise your energy consumption by an average of 1%.

Check the Oil Level Before Starting Your Compressor

Check the oil level using the sight glass before starting your compressor. Change oil filters every 2,000 hours of operation to remove metal filings, calcium and other materials in the oil and prolong its useful life.Shorten the intervals for changing and sampling oil when you have demanding conditions such as high temperatures or dust and dirt in your intake air. And, when you're using food-grade oil, you'll want to sample your oil every 1,000 hours and take action on the recommendations in the analyst's report.

Clean Condensate Traps and Drains Daily

Inspect the moisture trap drain and the drains in all your tanks, filters and dryers. You'll want to remove any scale, rust, dirt or other solids from condensate traps and drain points daily. Dirt and debris often accumulate in drains, causing them to become stuck. Stuck in an open position, the drain will leak air. And a closed drain will allow moisture and other impurities to pass through, contaminating your compressed air and possibly damaging production equipment.

Use Only OEM-Specified Oils and Lubricants

It's so central to the operation of your compressor that we consider rotary compressor oil the lifeblood of your system. And it's why we place so much importance on selecting the right oil for our compressors. For more on choosing the right oil for your compressor, read our blog post, “Choosing the Right Oil for Rotary Air Compressors.”

Our Factory

Hannemec(ShanDong) Intelligent Technology Co.,Ltd. was established in 2021 and is a manufacturer specializing in the research and development, design, production, sales, and service of air compressors. Its products include permanent magnet variable frequency air compressors, two-stage permanent magnet variable frequency air compressors, laser cutting special air compressors, oil-free air compressors, mobile air compressors, low, medium, and high pressure air compressors, centrifugal air compressors, and compressed air purification equipment

FAQ

Q: Do screw compressors need oil?

A: Screw compressor oil is essential for the compressor operation. Helps dissipate heat generated during compression, preventing overheating. If the temperature of the compressor is too high, the element or all rotating parts would be excessively stressed and the service life would be shortened.

Q: How long does a screw air compressor last?

A: Full Guide to Rotary Screw Air Compressors-Fluid-Aire Dynamics
Between 80,000 - 100,000 hours
On the other hand, a rotary screw compressor will last between 80,000 - 100,000 hours. Rotary screw compressors are known for their reliability and longevity.

Q: What is the service life of a screw compressor?

A: Oil-flooded rotary screw compressors: These compressors can last for up to 100,000 hours with proper care and maintenance, or up to ~20 years. With proper preventive maintenance, including regular oil changes, filter replacement, and inspections, they can last even longer.

Q: What is the lubricant used in a screw compressor?

A: There are two types of oil for air compressors: mineral oil and synthetic oil. These lubricants vary in their viscosity and contained additives: Mineral oil is produced from petroleum refining.For instance, rotary screw compressors work best with ISO 32 or ISO 46 oils, but a reciprocating air compressor, on the other hand, will function better with SAE 30 or SAE 40 oils.

Q: How often should a screw compressor be serviced?

A: Most compressor manufacturers recommend servicing annually or every 2,000 hours of use (whichever comes first). This might mean you carry out a service at a set interval, such as every 6, 9, or 12 months, depending on how frequently you use your compressor.

Q: What is the life of screw compressor bearings?

A: Most rotor bearings carry a B-10 life of 50,000 hours of service before replacement. In addition, each rotor has a set of thrust bearings affixed to the discharge end of the male and female rotor shafts. Each time the compressor pressure drops, it “loads” the pump and creates discharge pressure.

Q: Are screw compressors better?

A: If both a piston and a screw were running the same amount of hours, the screw compressor will be much more efficient and have lower operating costs than the piston over the lifetime of the compressor. Duty Cycle. Screw compressors have long duty cycles and are engineered to run 24/7.

Q: How to test a screw compressor?

A: The compressor will be tested with the inlet and discharge lines open to the atmosphere, using screw compressor manufacture shop test facilities including a speed-up gear, driver, shaft coupling, lube oil system and silencers etc. The test will be carried out at one point around the normal operating speed.

Q: Which oil is best for a screw compressor?

A: Unlike motor oil, air compressor oil does not contain detergent and typically has lower amounts of carbon, sulfur, and other contaminants that can cause build-up. Generally, rotary screw air compressors use synthetic oil, while recreational compressors may use standard oil.

Q: How do I know if my air compressor needs oil?

A: It may be found on the base of the pump for reciprocating type compressors or on the sump tank in a rotary screw compressor. In the middle of the sight glass, you will see a dot. Ideally, you want the oil level to be in the center of the dot. If the oil level is below the dot, your unit needs more oil.

Q: Can I use hydraulic oil in a screw compressor?

A: If you are unable to use an oil made specifically for air compressors, there are some acceptable alternatives: Hydraulic oil: Hydraulic oil possesses multiple qualities that make it an acceptable substitute for air compressor oils.

Q: What is a substitute for screw compressor oil?

A: Hydraulic oil
Hydraulic oil: Hydraulic oil is an acceptable substitute for air compressor oils. The oil has a low viscosity in lower temperatures, meaning it flows freely, given its low density. Also, hydraulic oil doesn't oxidize, preventing compressor parts from rusting.

Q: Can I use regular oil in my compressor?

A: While you could technically use motor oil to operate an air compressor, that oil type typically contains detergents that will cause carbon build-up within a compressor unit. Instead, oil manufacturers have created oil specifically for air compressors that don't include detergents.

Q: What are two ways to lubricate a compressor?

A: Different compressors use different lubrication techniques. In screw compressors, the oil is often pumped into the moving parts, while pistons and scrolls often employ splash lubrication using oil from a vessel in the bottom of the compressor.

Q: Can you use 10W30 for compressor oil?

A: And since 10W30 consists of detergents, it is advised not to be used. Additionally, the weight and viscosity also differ from the requirements of the manufacturers. Air compressor oils are significantly different from the ones used in automotive.

Q: Which is better scroll or screw compressor?

A: In these industries, compressor systems are required to run continuously for several hours, which is why the screw compressor is the perfect fit, as it tends to support continuous usage without getting overheated. On the contrary, a scroll compressor is an ideal choice for indoor settings where loud noise is a problem.

Q: Does a screw compressor run continuously?

A: Screw compressors running in load/unload with small storage receivers rarely turn off completely to limit the number of motor starts, which could prematurely burn out the motor; therefore, they will run continuously, consuming power even when they are unloaded and producing no air.

Q: Can a screw compressor be serviced?

A: In general, you should plan on servicing your rotary-screw air compressor once a year. Though, servicing needs for compressors vary based on a list of factors. Your machine may need servicing at 2,000 hours of usage, or it may not need servicing until 4,000 hours.

Q: What is the life expectancy of a screw compressor?

A: However, a well-maintained screw air compressor from a reputable manufacturer can typically last anywhere from 10 to 20 years or more. Some high-quality compressors may even have a lifespan exceeding 20 years with proper care.

Q: How do you control a screw compressor?

A: The main methods of screw compressor capacity control are shaft speed variation, suction throttling and variation of the suction volume. These have been analysed and are compared by the use of a standard mathematical model which has been adapted for this purpose.

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