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In this issue, we will focus on a much simpler way of sealing a rotating shaft of a pump. It’s by using gland packing. This method of sealing has been in use for a very long time, and is still being used today.There are advantages and disadvantages in using them.Perhaps the first and foremost reason for replacing them with mechanical seals is because of the fact that gland packing needs a small amount of leak for cooling purposes.A person who installs a gland packing must ensure that the latter does not grip the shaft too tightly. A little dripping must be allowed for. Pumps that contain hazardous liquids should not use them at all.Pumps that contain gland packing will usually be constructed with a small well and piping at the gland to lead the leak water away from the pump so as to ensure that the water will not damage the bearings, housing or foundation. This can really mess up the pump area if there is a choke at the drain piping that prevents the leaked water from flowing away.The pump gland nuts may need to be tightened every now and then due to slight loosening after some time of operation. This is because the nut cannot be tightened hard against the soft packing.Because the packing gland rubs against the shaft, it will tend to wear down the shaft. For this reason, and especially for larger pumps using packing glands, there will usually be a shaft sleeve that can be slipped over the shaft. The wear down will then occur only on the shaft sleeve. This can be replaced instead of the more expensive shaft.Another disadvantage of using packing glands is the fact that there is a certain amount of skill needed for cutting and installing the gland in order for it to work properly. It’s more difficult to get consistent results.Although there are disadvantages in using gland packing, there are also good reasons for using them.They are less expensive to use compared to mechanical seals. If chosen and installed correctly, they can last for a very long time. When changing packing glands, the pump housing need not be opened up. This can be an advantage when skilled labor is in short supply. Keeping stock of spares is not a problem because they can be used for all pump brands as long as they have the same gland sizes. Pump packing materials are more robust compared to the fragile and delicate mechanical seals.For more information on gland packing and pump troubleshooting, download the free software from http://www.free-marine.com/diagnoppad.htm

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There are a number of different ways to create pure water from water that comes from natural sources or indeed, water that emanates from human drainage systems. The most common water purification in Lincoln, NE is when water is extracted from a constant source and mechanically enhanced by removing all the physical impurities. Once the physical impurities have been removed from the source water and any harmful bacteria or organisms in the water have been destroyed the water is safe for human consumption.

The process of water purification begins when water is taken from the source, this can be a river, lake or a sewer system. The water is first sent to huge holding tanks where it is allowed to sit motionless for long enough for much of the suspended material to be separated as it sinks to the bottom of the tank.

Once the initial separation process has been completed the water moves on to the actual purification process. It moves from the holding tank to another tank where large physical objects are removed, not sediment. At this stage the pH of the water is adjusted to within specific limits and sodium carbonate is put into the water, this begins a reaction that results in calcium carbonate.From here the water moves to areas where the water is disinfected. As it moves from the second holding tank and heads to the area where water purification in Lincoln, NE takes place, harmful microbes are destroyed. In the past the destruction of the microbes was done with chlorine, today much of the purification process is done using hydrogen peroxide, UV light and ozone.

At this stage the water is still not purified, it must be subjected to a process called flocculation. Based on the original source of the water and the location of the purification plant tiny particles are added to the water. These tiny particles are attracted to one another and many of the common impurities found in water. These particles eventually form small balls of impure material; this water then flows to another tank where the little balls settle on the bottom.

The final stage of the purification process is active filtering. Many different filtering methods exist but the most common is to force the water through a bed of sand. Once filtration is complete the water is fit for human consumption and is piped to the consumer through the municipal water distribution system.

Dissolved mineral salts, excessive chorine and even bacteria can still remain in the municipal water when it arrives in your home and further water purification in Lincoln, NE will improve the taste and odor. You are invited to contact Futuramic’s Clean Water Center to learn more about their reverse osmosis and UV sterilization systems.