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How to choose air compressor?

Le 5 September 2017, 04:05 dans Humeurs 0

The basic criterion of choosing air compressor is economy, reliability and safety.
First, the exhaust pressure should be taken into account and the amount of exhaust. For general purpose air compressors, the exhaust pressure is 0.7MPa, and the old standard is 0.8MPa. At present, there is an air compressor whose air pressure is 0.5MPa in the society. It is unreasonable from the point of view of use, because the pressure margin is too small for pneumatic tools, and the distance of gas transmission is a little far away, so it can not be used. In addition, from the design point of view, this compressor is designed as a primary compression, the pressure ratio is too large, easy to cause exhaust temperature is too high, causing the cylinder carbon deposition, leading to accidents. If the compressor used by the user is larger than 0.8MPa, it should be specially made, and the method of pressurization can not be taken so as not to cause accidents.
The air displacement is one of the main parameters of the air compressor. The air pressure of the compressor should be matched with the required amount of exhaust, and a margin of 10% should be left. If the use of large air compressor and small amount of exhaust, pneumatic tools to start, will cause air compressor exhaust pressure greatly reduced, and can not drive pneumatic tools. Of course, the blind pursuit of large exhaust capacity is also wrong, because the greater the amount of exhaust, the larger the compressor motor, not only the high price, but also the waste of purchasing funds, the use of energy will also waste power.
In addition, the peak volume, the usual dosage and the trough amount should be taken into account in the selection of the exhaust volume. If a low dosage and large dosage and usually peak consumption is not large, the usual way is to obtain a large amount of foreign air to air compressor in parallel with small amount of exhaust gas, increases one by one boot, which not only has the advantage of power grid, but also can save energy.
Two, it is necessary to consider the gas field and conditions. Venues such as small gas (ship, vehicle), should be vertical; such as gas with the change of long distance (over 500 meters), should be considered mobile; if the occasion should not use electricity, should choose the diesel engine driven; if there is no occasion to use tap water, you must choose air-cooled. In air-cooled, water-cooled cooling method on two types of users often have the wrong understanding, that water well, in fact. Domestic and foreign small compressor stroke cold type accounted for more than 90%, this is because in design, wind cooling is simple, use without water source.
The fatal drawback of water-cooled compressor has four: there must be a complete water system, large investment; short life of water-cooled chillers; in winter in the north is also easily frozen cylinder; in normal operation will waste a lot of water.
Three, we should consider the quality of compressed air. General air compressor compressed air generated by both contain a certain amount of lubricating oil, and a certain amount of water, oil and water cut is banned in some occasions, then not only pay attention to selection of the compressor, when necessary to increase the attachment.
Solutions: first, the use of non lubricated compressor. The compressor cylinder is basically oil-free, and its piston rings and fillers are generally teflon. But this machine also has the shortcomings of bad lubrication, the high failure rate; PTFE is a kind of harmful substances, food, pharmaceutical industry cannot be used; only do without gas compressor lubricating oil is not, can not do without water. The second is also a common method of adding air compressors (either type) to one or two purification units or dryers. The device can make the air of the compressor neither oily nor water cut, so that the oil content in the compressed air is below 5ppm, and the process requirement can be satisfied.
Four, it is necessary to consider the safety of compressor operation. Air compressor is a kind of machine with pressure working, it is accompanied by temperature rise and pressure, and its operation safety should be placed in the first place. The state has standardized the "two certificates" system for the production of compressors, that is, the production permit for compressors and the production license for pressure vessels. Therefore, in the selection of compressor products, we must strictly review the "two cards."". Usually the manufacturer's product quality assurance system is perfect, there will be no major quality problems, even if there are some problems, but also by the manufacturer responsible for three packs.

120W ZT Series LED Heat Sink

Le 4 September 2017, 05:56 dans Humeurs 0

120W ZT Series LED Heat Sink

120W ZT Series LED Heat Sink


Cooling Principle:Phase Change Heat Transfer

Thermal Resistance (Rth):0.4650°C/W(test power:80W)

Overall Size:φ140*124mm

Base Plate:Ф30(Cu)*3+96(Al)*4mm


Simply installing 2 or 3 pendants in line over an island can be quite stunning

Le 29 August 2017, 04:18 dans Humeurs 0

Simply installing 2 or 3 pendants in line over an island can be quite stunning. All rights reserved.

Your kitchen, more than any other room in your home, needs a good well thought out lighting plan. Recessed lighting is a good way to provide general lighting in a kitchen in a neat and clean way. For this reason it is important that the light not only be adequate but flexible. For many families it is the most frequently used room in the house. The way the counters are illuminated is with Heat Pipe Heat Sink under cabinet lighting. This is the light that will be used most of the time. For more lighting tips and lighting design help visit the links below. This includes counters, islands and tables. On some kitchens where there is a space above the cabinets, lighting on top of the cabinets can look spectacular.

After you have your general lighting and task lighting covered the last thing to consider is any accent lighting.

Paul Forte has been in the lighting and electrical field for over 25 years. If you can try and stay with xenon as they burn cooler and have a longer bulb life than halogen. In a kitchen this is the light directly over the counters, stove and sink.

The placement of the lights is very important. These can be dimmed and provide very good light to the counters. I find it is probably one of the most commented on aspects of a kitchen lighting plan when the homeowner sees the finished product. Having one or two small recessed lights on a separate switch over the sink is both attractive and useful. Using either a low voltage type track or rope light, you can add that extra touch that makes your kitchen unique. A very nice effect is to use low voltage linear track. The stove these days is almost always lit from a fan hood or microwave but if it is not it should be addressed. In the case of a very small kitchen, one light in the center of the room will provide the general light.

Islands can provide a great outlet for adding a decorative fixture or fixtures to the room. Besides the obvious preparation of meals, kitchens today are also a place for the kids to do homework, parents to pay the bills, reading, eating and watching TV. This can be in the form of simple fluorescent fixtures on an economical level. Today's kitchens have many more functions than just cooking a meal. In most cases, by designing the light to illuminate these areas, the rest of the room gets a good spread of general light as well. Depending on what part of the country you are in they may be called high hats or pot lights or can lights.

The next step is the task lighting. Don't overlook any nooks that may be dark. All these terms mean the same thing. He will be appearing on an upcoming episode of "It Takes a Thief" on the discovery channel installing some security lighting. Tray ceilings with crown molding can also benefit greatly from this type of lighting. He has helped countless homeowners across the country with their lighting needs through his website. Putting the lights to far away from the counters is a sure formula for shadows. There are also xenon fixtures and halogen fixtures.

(c) Copyright 2005 Paul Forte.

The first place to start in any room when devising a lighting plan is to address general lighting.

. When designing a layout for the general lighting Copper Tube Heat Sink in a kitchen, we want to take into account the areas where tasks will be done. There are a multitude of pendants to choose from that can really enhance the room. The most common solution is recessed lighting. Try to have the recessed lights fall out on the ceiling so that they are directly above the outside edge of the cabinets. The key here is getting the lights close enough to the work area so that you don't create a shadow with your body. With most of today's kitchens being larger, a single light fixture in the center of the room probably won't satisfy your lighting needs.

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