Blog | Hi-Tech Engineering Services LLC Sharjah UAE

Archive for July, 2010

Something About Air and Water Cooled Chillers

by on Jul.23, 2010, under Mechanics

The most common compressors used in refrigeration are reciprocating, scroll, screw-driven centrifugal. With various refrigerants chillers used in industry in industrial application, chilled water or other liquid from the chiller is pumped through process. Industrial chillers are used for cooling of products and factory machinery in a wide range of industries.

They are often used in the plastic industry in plastic processing like injection molding, blow molding, extruders, laminations, p.P. Films, rigid p.V.C. Pipe, calendars, chemicals, pharmaceutical process, dyes intermediates, mineral water soda process, paper converting, coating chill rolls, plating and anodizing, lubricants/oil cooling, dairy, bakery, food products, dehumidifier, conditioned air, welding equipment, cement processing, vacuum systems, x-ray diffraction, analytical equipment, compressed air and gas cooling.

Chillers are usually small in size (cooling capacity), usually from 1 tons to 100 tons.

Central chillers generally have capacities ranging from ten tons to hundreds or thousands of tons.

Water chillers can be either water cooled or air-cooled. Water cooled chillers offer efficiencies better than air cooled is due to heat rejection at or near the air’s wet-bulb temperature rather than the higher, dry-bulb temperature but it is used in conjunction with cooling tower.

The heart of the chiller is the refrigeration compressor. This is a pump that uses electrical energy to pump refrigerant around the system. Depending on the application like size or operating temperature, a different compressor pumping technology is used. Smaller chillers use refrigeration compressors like rotary compressors, scroll compressors, and reciprocating compressors. Larger chillers use refrigeration compressor like reciprocating compressors, screw compressors, absorption compressors, and centrifugal compressors.

Article Source:

Leave a Comment : more...

Sheet Metal Fabrication – Know Facts About It

by on Jul.23, 2010, under Fabrication

There are a number of useful devices and systems that changed our life for the better. Metal fabrication is one of the processes used in the industry. It is basically a process of producing or creating a metal component. It is done by modifying raw piece of material. These materials or metals are processed on different temperatures.Depending on the temperature range, the process is classified as hot, cold and warm. metal fabrication defines different processes. With these processes finished products are formed from sheet metal. Materials or objects that are fabricated and used for machinery and other instruments are daily used objects like automotive parts, computers, paper clips, bolts, automotive parts, nails and many more.

The process or system of Metal Fabrication is not new. It was developed ages ago. In the past hand tools were used in place of machinery tools to fabricate metals. Now various improved and useful technologies have evolved to complete the process successfully. Improved quality tools are created.

Technological advancements in engineering and metallurgy led to the introduction of various improved metal fabricating techniques and tools. These devices and systems are used and developed for industrial and engineering purposes. Different products with different features are created from different techniques.

Various types of products or objects are created during the metal fabrication process. Some of the most common products produced in this process are ventilation shafts, enclosures, metal cabinets, hoods, tanks, exhaust system, prototypes and tanks. Various other industries or sectors, including food storage, food dispensing, communication, computer, automotive, electronics, medical, telecommunication, aerospace, residential, pharmaceutical and construction also use metal fabrication process.

There are different types of sheet metal fabrication processes. These include
* Bending (straining)
* Annealing (heating)
* Cold rolling (shaping metal using rollers)
* Cold forming
* Forging (hammering or pressing)
* Drawing (material is forced into a die to form a cup-like shape)
* Rolling (reducing width of the material)
* Forging (pressing or hammering)
* Spinning (forms axially equal shapes)
* Extrusion (producing hollow tubes or cylindrical bars by forcing round billets via one or more dies)

No matter how small or big is your unit; the main objective should be performing Sheet Metal Fabrication process with perfection. Dedication and patience are two of the important things that help you to make the process successful.

Choosing the right metal fabricator is very essential. You need to keep in mind certain important things while selecting a metal fabrication service. Make it sure that it has stable and organized platform to give the desired layout of the sheet metal.

There are a number of sheet metal fabrication services all across the planet. It is better to opt for the one that produce quality items using latest and improved equipments or tools available in the industry, such as laser, water jet and other cutting edge technology.

If you are searching for a reputed and reliable sheet metal fabricator and laser cutting service, Garrick Engineering ( is the right place for you. They provide quality services with dedication and devotion. They have a team of experienced and efficient metal sheet fabricators who put much effort in providing quality service.

Article Source:

Leave a Comment :, , more...

7 Different Types of Milling Machines

by on Jul.23, 2010, under Mechanics

Milling machines come in various types with a variety of functions based on certain standard specifications. Some of the most commonly used machines are the following: column, turret, C-frame, horizontal, bed type, planer-style, and tracer controlled.

A milling machine is a tool in the metal industry that has numerous functions. Each machine has a cutter that operates at a various range of speed so you can form the required shape. With its adjustable spped feature, each milling machine can be regulated for a more precise cut. The machine is capable of handling multiple tasks such as carving, threading, milling, drilling, and cutting. There are several several types of milling machines, each with varying functions based on standard criteria. Manufacturers often name the different machines according to the kind of control, number of axis present, orientation of the spindle, size of the tool, its purpose, and source of power. While there are several varieties of milling machines available today, they essentially serve the same functions but use different terminologies. Below is the list of seven types of milling machines.


This is the most common milling machine, which has 5 basic components, They are the work table, saddle, head, knee, and over arm. Considered as the simplest machine type, its cutting device is vertically suspended to allow drilling of metals. This is typically used when creating car parts because it is small and handy.


The turret is also known as the Bridgeport-type and can be repositioned anytime you want making this machine very functional. Its versatility makes it more practical since a variety of products can be made in addition to car parts.


Because it is sturdier than a turret, this type is popular in industrial settings. It comes with a hydraulic motor, which makes it very powerful.


This machine runs parallel to the ground. The table from which the object to be worked on is placed moves sideways while the cutting device goes up and down.

Bed type

The worktable is located on the bed itself, instead of being paced on top, its usual position. The knee part of the machine is omitted to allow movement in a longitudinal direction.


This machine type is basically the same as the bed mill. However, the planner-style includes cutters and heads that allow for a wider range of milling actions.

Tracer controlled

This type of machine has the ability to reproduce parts based on a master model. Most of the industrial sectors, especially the automotive industry, choose this type of machine because it make production and specialization of machine parts easier. With the vast classifications of milling machines, you need to choose the one you need according to how you intend to use it. However if you find it difficult to decide, do not hesitate to seek the help of a specialist who can help you select the one that will give you maximum benefits.

If you need help, or to find out about spindle repair, please visit Motor City Repair for more information.

Article Source:

Leave a Comment : more...