Blog | Hi-Tech Engineering Services LLC Sharjah UAE

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: http://EzineArticles.com/?expert=Sunil_Dumbre

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.

Column

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.

Turret

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.

C-frame

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.

Horizontal

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.

Planer-style

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.