Oil-Injected Compressors v/s Oil-Free Compressors

A new buyer on the road in need of an air compressor will be confused with the labels of ‘Oil-Free” and “Oil-Injected” attached to the respective ones within the shop. A professional or an expert knows the two and buys the right one for his/her company, whereas a non-expert in the field might stand wondering, utterly confused about the right choice. This article puts before you the actual difference between them and then you know which is accurate for your business. Once you know, contact the best compressor services in Dubai, they will install the right one that suits your need. 

What is an Oil-Injected or Lubricated Air Compressor?

Oil-Injected air compressors use a liquid component, most commonly oil for its lubricating and sealing properties, injected into its operation chamber for the smooth functioning of its elements. Oil-Injected compressors are majorly utilized for:

Cooling and lubricating the compressor elements’ and moving parts

Cooling the compressed air within the chamber

Minimizing leaks during discharge

Operating within temperature limits, removing excess heat during the processes

The lubricant is removed from the compressed air using different air filtrations like centrifugal separators or coalescing filters. The oil is thoroughly filtered and cooled before re-injecting them to the operational chamber. These lubricated air compressors require routine maintenance and change of oil, or any synthetic lubricant, from time to time. 

What is an Oil-Free Air Compressor?

Oil-Free air compressors are operated with external gearboxes, thus the elements within the compressing chamber do not come together to create any friction. As a result of which, the compressing chamber is completely lubricant-free, whereas the external gearbox requires oil or other lubricants against corrosion, reduces friction and ensures efficient, reliable operation of the elements. To avoid the scenarios of overheating and possible leakages, oil-free compressors often have a two-step process of compression. In order to remove excess heat, there is an intercooler installed in between the two stages and an aftercooler at the end of the process. 

They have two advantages compared to oil-injected compressors:

They have low maintenance costs, as there is minimal repair work in the compressor chamber, only the gearbox requires regular service.

They offer clean compressed air, free of any contaminants or foreign particles within.

In conclusion, it can be said that the industries with heavy workload using air compressors can go with the lubricated/oil-injected air compressors and the industries like pharmaceutical, food processing or electronics, that requires high-quality pure air can pick oil-free compressors for an excellent final product free of contaminants. Instead of going for a new compressor, one can always opt for highly serviced used compressors in UAE, for lower costs.  

Tips for Commercial Refrigeration Maintenance

 Walk-in freezers, coolers, and other types of commercial refrigeration units are an integral part of any business industry. Even the slightest of errors can lead to the breakdown of these refrigeration systems, thus they need to be regularly checked for optimal performance. Poor maintenance of commercial refrigeration can cost you many things like you could lose the unit as a whole, lose customer base due to inhospitable environment, energy costs including extra electricity bills, repairing and replacements of the parts etc. Thus, monthly and quarterly maintenance had to be done in different parts of commercial refrigeration. One can also hire the best HVAC services in Sharjah to do the maintenance checks from time to time. 

Check refrigerant levels for leak or low or wrong charge

Check lines of condensation for any clogging, and allow it to drain freely

Clean condenser coils, if they are dirty or dusty, it is difficult to maintain temperature, which causes overheating and component failure.

Maintain evaporator coil, responsible for absorbing heat. Blocked airflow inside the unit can cause the coil to freeze, leading to water leaks and temperature rise. 

Clean fan blades, poor lubrication or blockages in the vents can lead to fans stopping to spin. 

Inspect fan motor, dirt inside the cabinet can cause serious malfunctions of fan motors. 

Check for loose electrical components, a surge of electrical current creates excessive heat and a total electrical control failure.

Check temperature and defrost settings, faulty relays, controls, or sensors can cause defrost issues. 

Check filters on ice makers, rinse them with warm water until they're clear of debris.

Check for holes, cracks in gaskets, which can prevent the door from sealing shut, causing cool air to exit the fridge’s interior. 

Lubricate door hinges

Keep Your Refrigeration Unit Dry, any spills have to be cleaned up immediately. 

Keep the above mentioned commercial refrigeration maintenance checklist in mind to maintain your equipment in top form. The best maintenance experts of chiller companies in Sharjah providing excellent refrigeration services suggest that maintenance is to be done periodically for optimum efficiency and risk-free regulation of the entire commercial space. 

 

How to Enhance a Compressor's Energy Efficiency?

An air compressor’s efficiency often comes with maximum utilization of the energy resources and compressed air.

Due to the non-usage or leakage of the compressed air, energy gets wasted in the whole process. Thus, it is rather necessary to enhance your compressor’s energy efficiency.

Here are some of the ways to ensure efficiency:

• Examine the whole usage: You must have a detailed understanding of the whole compressed air system, including the compressors, the air supply lines, end uses etc. This gives a comprehensive idea of how your machine works and what are the possible issues causing troubles like:

1. Leakage
2. Pressure Drops
3. Air Storage
4. Over Pressurization
5. Condensation Drains
6. Poor Management of the compressor system

• Verify CFM Output: Several issues on the piston rings and premature modulation of different compressors can result in lower amount CFM output much lesser than what it is supposed to produce. You could do an examination of the inaccuracy of the adjustment valves and change them if they are the major cause of the issues. 

• Reduce Pressure Drops: During the service life of an air compressor, the pressure drops must not exceed 15 psi. When it becomes more than 10 per cent you ought to check the whole distribution system and find the cause of this excessive pressure drops. And you could:

1. Install an air distribution piping that is big enough to reduce pressure drops
2. Install a pressure regulator
3. Install inlet air filters that remove all the dirt that restrict the airflow

• Check leakages: You should always conduct regular inspections on the leakages while and off production times to ensure the overall leak rate. An ultrasonic leak detector and professional auditor are excellent to find and fix the leakages.

• Check V-belts: Frequently ensure that the V belts are tight enough because loose belts can reduce the efficiency of the compressor.

A regular inspection of all these things is tremendously important in the energy-saving and efficiency of an air compressor reducing energy wastage. The best compressor overhauling companies in Sharjah and other parts of the world provide great services in checking your compressor and repairing it in a way that gives maximum output without any possible wastage. 

3 Basic Problems of Chiller Systems and their Possible Causes

Even after regular checkups and maintenance of chiller machines, they can face issues and degradation over the years due to the continuous workload or damages on different parts of the system.

Whenever a client calls in to report an issue of the machine, the respective HVAC chiller services take an immense effort in reaching down to the customer and repairing it for better performance.

There are three basic problems that are usually seen in chiller machines and here are some of the most possible reasons behind these failures.

• Chiller Machine does not power on

• One of the most common causes of a machine not turning on would be a loose contact or an improper voltage line that gets high and low at times, whereas a chiller requires a constant voltage source.

• In cases of three-phase units, an incorrect phase connection could result in this problem.

• There is a possibility of the circuit or fuse to be blown or tripped that cuts the current supply.

• It could also be a simple mistake of not noticing that the machine is in an “off” position.

• Insufficient Fluid Flow

• Constant fluctuations in the voltage can result in this issue.

• The fluid stored in the reservoir would be insufficient for a powerful flow.

• There is a high chance that the process line, process valve, fluid filter etc. are pinched or blocked with dirt restricting the fluid flow.

• This issue can also arise if the process piping is too small when the requirement is higher.

• A failure of the pump. 

• Insufficient Cooling Effect

• Fluctuating voltage sources may cause this issue of inadequate cooling. 

• The air filter or the condenser could be clogged.

• The coolant fluid within the machine could be unsuitable for temperature requirements.

• The earlier heat transferring properties of the coolant fluid must have deteriorated over the years.

• There could be a refrigerant leak.

• The evaporator could be filled with ice.

These three are the most common problems seen around chiller machines that trouble the effective functioning of the system. The best chiller repairing in UAE and other parts of the world are definite in providing their qualified services in repairing and fixing all the chiller related problems for better functioning of the machine in the future. 

Different Applications of Industrial Chillers

 

Industrial chillers are these types of chiller machines mainly used in industrial production sites.

Within industries, due to the production processes there arise high temperatures and the machines are at high risk of overheating.

There comes industrial chillers at these production industries that use vapour compression or absorption method for transferring the heat produced inside and replaces it with cooling effect.

They are specially designed in such a way that they can cool down any kind of equipment, thus are in high demand at the industries.

Here are some of the areas or fields that make imminent use of industrial chillers:

• Plastic Industry: During the production of plastic products, the machinery tends to produce heat and chillers are at rescue cooling the machines. This cooling effect is extremely important as it saves a lot of energy and prolongs the life of production machines. They are also involved in the process of cooling the hot plastics readily produced. 

• Beverage Industry: Beverages comprises a wide range of varieties that include milk products, soft drinks, breweries etc. Beverage industry involves all these processes of pasteurizing, cooking and mixing that emits a lot of heat that must be cooled for the better performance of machinery and fine quality of the end products. 

• Printing Industry: In the printing industry, a lot of plastic rolling and friction happens that give rise to heat that definitely requires a chiller unit. They are also imperative for cooling the papers that come out of the ink drying machine. 

• Rubber Industry: Chillers are also necessary at the rubber industries for cooling the rubber mixtures and the entire rubber mills by utilizing the water temperatures. 

• Laser and Cutting Industries: In these industries it is the overheated power supply that provides laser and light requiring constant cooling in order to function efficiently and effectively. 

• Medical Industry: Medical industry has the usage of a wide range of equipment and plastic products within the hospitals. Even the MRI Scanner used to diagnose and treat different disease conditions emits a lot of heat that must be managed with the help of a medical chiller. 

All the above mentioned industries use chiller services for maximum production and saving their costs.

Chiller systems well- known for cooling the overheated production processes are indeed a necessity in each and every industry for the crucial merits it offers.

The best chiller services in UAE and other countries provide quality installation of industrial chillers at your workspace for increased productivity. 

How does Air Curtains help in Insect control?

 

Air curtains are usually known to be this cooling device that uses the compressed air as their primary source and balances the temperature within the industries and companies.

One of the significant features of air curtains is that they can effectively help in keeping the pests, flies and other malicious insects at the bay of your company door.

Dan Clark, a renowned housefly pest control expert, claims that although glue boards and ILT’s are great reactionary devices for the pests that already gained access within, an air curtain is more of a proactive approach for the problem.

These air curtains are installed above the door opening and they emit high velocity, invisible air streams that act as barriers against the flies trying to enter the building. 

These types of Pest/Insect control air curtains are mainly used in the following commercial fields of:

• Food processing plants

• Dairies 

• Bakeries

• Bottling plants

• Restaurants

• School cafeterias

• Supermarkets

• Hospitals 

• Pharma industries

These air curtains give effective results no matter of their installation vertically or horizontally, inside the doorway or outside the doorway. The most prominent need is that the whole doorway must be wholly protected against the entry of insects, a minimal amount of gap is sure to attract flies into the building. 

Installing air curtains inside or outside of the door depends on the needs and requirements of the customers as they have different functionality. Air curtains inside would be preferable in areas of heavy winter, as they help in maintaining the temperature within the building and stop the influx of cold air from the outside along with the prevention of airborne insects.

In some cases air curtains are best outside as they might be an odour within the building that has higher chances of attracting insects into the building. So in order to avoid that it is best to install the air curtains on the outside. To achieve a high level of protection of the doors and buildings one may have to use powerful air curtains of UAE or other parts of the world for longer life and enhanced performance. 

3 Basic Problems of Chiller Systems and their Possible Causes

Even after regular checkups and maintenance of chiller machines, they can face issues and degradation over the years due to the continuous workload or damages on different parts of the system.

Whenever a client calls in to report an issue of the machine, the respective hvac chiller services take immense effort in reaching down to the customer and repairing it for better performance.

There are three basic problems that are usually seen in chiller machines and here are some of the most possible reasons behind these failures.

• Chiller Machine does not power on

• One of the most common causes of a machine not turning on would be a loose contact or an improper voltage line that gets high and low at times, whereas a chiller requires a constant voltage source.

• In cases of three-phase units, an incorrect phase connection could result in this problem.

• There is a possibility of the circuit or fuse to be blown or tripped that cuts the current supply.

• It could also be a simple mistake of not noticing that the machine is in an “off” position.

• Insufficient Fluid Flow

• Constant fluctuations in the voltage can result in this issue.

• The fluid stored in the reservoir would be insufficient for a powerful flow.

• There is a high change that the process line, process valve, fluid filter etc. are pinched or blocked with dirt restricting the fluid flow.

• This issue can also arise if the process piping is too small when the requirement is higher.

• A failure of the pump. 

• Insufficient Cooling Effect

• Fluctuating voltage sources may cause this issue of inadequate cooling. 

• The air filter or the condenser could be clogged.

• The coolant fluid within the machine could be unsuitable for temperature requirements.

• The earlier heat transferring properties of the coolant fluid must have deteriorated over the years.

• There could be a refrigerant leak.

• The evaporator could be filled with ice.

These three are the most common problems seen around chiller machines that trouble the effective functioning of the system. The best chiller repairing in UAE and other parts of the world are definite in providing their qualified services in repairing and fixing all the chiller related problems for better functioning of the machine in the future.