Technology

How gear pump works?

As the name suggests gear pumps have interconnecting gears which create positive displacement of fluids passing through it. The gear pumps are used in several industries. Due to their ability to pump highly dense fluids these are used in several industries. Positive displacement is another factor that is associated with it also known as fixed displacement. Positive displacement also refers to the fact that they can pump a designated amount of fluid for each run. Mostly these devices are used in chemical firms and cement factories as both deals with highly dense fluids passing through centrifuge pipes. However some fluids are so dense that they cannot be handled by centrifuge pipes. Gear pumps are therefore used to ease the working of these pipes. Increased productivity and cost reduction are other factors which are associated with these devices. Another advantage of this kind of pump is that it can be used separately as a motor as well. The pump base use of this device is also applied in various industries.

Working of gear pumps

There are different mechanics which are used by gear pump manufacturers. The two most important types are internal and external gear pumps. However the working remains the same. The pump is installed for intake and discharging of fluid. When the fluid enters the pump the rotating gears make sure that fluid is separated and then taken to the other i.e. discharges side of the pump. The clearances of the pump are very tight and therefore they prevent the backward flow of the fluid. The rotating gears and the discharge mechanics of gear pumps make sure that highly dense fluids pass through these devices. It also maintains the speed.

Some precautions

Gear pumps are being manufactured by a number of businesses especially in China. They can lead to business cost reduction and durability of the right choice is made. It is therefore advised to read the customer views before making a purchase from any manufacturer to save both time and effort.

Uses of gear pumps

There are several uses of gear pumps which not only show their importance but also the reliability which is associated with them. Some important uses of gear pumps are as follows:

  • As high pressure and density are handled by gear pumps so the oil industry comes first to apply this mechanic. Crude oil and lube oils are the ones which are extracted and transferred with the help of this pump.
  • Highly dense chemicals such as silicate, acids and plastics are also transferred with this pump which ultimately leads to awesome results. Less effort is required and therefore there is no need of any additional mechanic installation.
  • In paper industry this pump is used to transport lime, latex and sludge. As the paper is in pulp form and highly dense so no other mechanic could be used other than gear pumps.
  • In food industry there are many dense items such as raw cocoa paste and chocolate. These are also transferred by these pumps for efficient and effective results.

How to Torrent Safely – precautions to take

Many countries in the world had made it illegal to download files using torrents. Your internet service provider issues a warning whenever you are trying to access something using torrents. The need to safely access the information you want without the fear of surveillance have led to many services which claim to guarantee online privacy and anonymity. But are they foolproof?

It is better to use some form of encryption, but your task does not end there. There are other practices you need to adopt if you want to use torrents safely. Read on to know how you can use torrents with the peace of your mind.

Choose the Best VPN Service

Now this is a must. Many people advocate using proxies to ensure anonymity, but they are not as efficient as a reliable VPN service.

Your goal is to go for a provider which allows you to use torrents through their VPN network. They are equipped with dedicated servers which are used for the purpose of Bit torrents only.

The best VPN providers are those who do not even maintain a log of your connection. VPN changes your IP address and traffic taking you beyond any detection or snooping. You can know in-depth about VPN service features at AntaNET website and learn about the best practices of using the technology to protect yourself on the internet.

Check the Seeders

A high number of seeders do not only mean high downloading speeds; they indicate a lot more. Firstly you are assured that many people are downloading the specific file and it is safe and free from virus or malware. It also means that it is easy to download and it may not be under surveillance from any agency.

So always go for torrents which have a considerable number of seeders.

Eliminate Bandwidth Limitations of your ISP

Most ISPs are known to limit the bandwidth of their users when it reaches high levels. They are constantly monitoring your behavior and the spike in bandwidth tells them when you are downloading a file or watching a movie online.

To avoid this limiting of bandwidth by your ISP, the best way is to route your connecting through a VPN network. The restrictions will be eliminated and you will be able to torrent at the normal speed.

Protect your Torrent Searches

You are not safe just by protecting your torrent downloads; you also have to cover up your torrent searches. Professional VPN services act as a standalone tool to encrypt and protect all your internet activities, but not all providers offer this.

So you must encrypt your traffic to the torrent indexes either through VPN or proxy and download torrents anonymously.

Have an Antivirus in Place

Torrents can contain malware, spyware or virus in them which can be introduced into your computer once you download the torrent file. So to save your device from being infected, it is best to use a reliable antivirus which keeps you safe from the threats of hackers and cyber criminals.

To torrent safely you need to undertake a few tasks. They may take a bit of time, but it is really crucial for your safety and privacy.

A Look Into Portland Cement Types & Production Features

The post on portland cement manufacturing features is prepared in cooperation with Telling, the architectural company widely using hydraulic lime, lime mortar and concrete materials in its projects.

Plasticized portland is the product of pulverizing portland cement clinker with gypsum dihydrate (3-5%) and with addition of about 0.25% of yeast mash sulfide or other plasticizing additives at a grinding stage. These additives are adsorbed on the surface of the cement particles, improve wetting of cement with water and preventing their interaction. The additives reduce the friction between the grains of cement in concrete mixtures – and between grains of filler, thereby increasing their mobility, which can reduce the consumption of cement in the concrete by 5-10%.

Hydrophobic Portland cement is the product of pulverizing portland cement clinker with gypsum dihydrate (3-5%) and with the addition of 0.1-0.2% of hydrophobic additives – oil soap, synthetic fatty acids, etc., during grinding. Synthetic fatty acids, their salts and other particles are adsorbed on the surface of the grains of cement, to form thinnest water repellent films, reducing wettability. As a result, the hydrophobic cements can stay a long time in air with high humidity without losing its qualities.

While stirring concrete the integrity of hydrophobic film is disrupted, after which the cement reacts with water easily. The remaining additives in the concrete improve its quality, such as increasing the frost resistance, resistance to aggressive environments, etc.

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Ultrasonic Cleaning From The Physics Point Of View

The material presented in the article is intended primarily for the staff of organisations that use ultrasonic cavitation treatment plants for liquid media in ultrasonic equipment. The information is kindly provided by Hilsonic, a far-famed British company, now specialising in the production of high-tech ultrasonic cleaning equipment for 7 years.

The principle of operation of the ultrasonic reactor & the effect of static pressure

The functioning of ultrasonic reactor is based on the ultrasonic cavitation in the thin layer of pumped liquid to be treated through the reactor. The ultrasonic oscillator generates the ultrasonic frequency voltage received by ultrasonic transducer, which converts the high frequency voltage in an ultrasonic frequency and mechanical vibrations. These vibrations are transmitted to the emitter, which comprises a hub, whereby high frequency fluctuations are amplified and on the output they may generate up to 100 microns or more. Converter with a radiator attached to the body of the reactor through the support mechanism.

In case of fluctuations of the radiator at an ultrasonic frequency to be treated in the reactor liquid medium having alternation of compression and expansion, which create additional pressure change in a relatively constant static pressure of this environment. These pressure fluctuations in the liquid medium are defined by sound pressure, emitted by transmitter.

As a result, the liquid medium is observed closely associated with the sound pressure effect called ultrasonic cavitation, which refers to the formation of steam and gas in a liquid medium (cavitation) cavities in the negative phase of the sound pressure of the acoustic oscillations of ultrasonic frequency, followed by slamming them into the positive phase sound pressure with the formation of shock waves.

The emergence of cavitation bubble and the effects associated with it slamming depend on a number of parameters: acoustic characteristics (sound pressure and frequency), the thermodynamic parameters (pressure and external temperature) and parameters of the liquid (density, viscosity, surface tension, vapor pressure and solubility of liquid gas therein). (more…)