First, look at the audience retention report for one of your videos. You might have noticed that I’ve embedded quite a few of my YouTube videos in this post. In fact, a study by Stone Temple Consulting found that 55.2% of YouTube videos ranking in Google were different from the top videos ranking in YouTube’s search results. Online communities are GREAT places to promote your YouTube channel and videos. YouTube has confirmed that your video descriptions “let YouTube’s algorithms know what your videos are all about”. But when you use BOGY thumbnails, your videos stand out and grab attention.

When the dump file is imported, a character set conversion is required for DDL only if the database character set of the import system is different from the database character set of the export system. When an export operation uses data file copying, the corresponding import job always also uses data file copying. During the ensuing import operation, both the data files and the export dump file must be loaded. In this type, water enters the pump radially while discharging axially.

In this, the fluid enters from the first impeller under the pressure of the suction line and leaves at some high pressure. In this, the impeller vanes are sandwiched between two cover plates. These are installed in radial flow centrifugal pumps and can be either single or double inlets. Additional detailed knowledge regarding each of these designs can be gained by studying catalog data freely available from many different pump manufacturers.

Which helped my brand new video get a handful of high-quality views. These broad keywords are designed to help YouTube understand your video’s overall topic and category. If the shaft speed increases by 10%, then due to power being proportional to the cube of shaft speed the power will increase by 33.3%. 5.2  The flow of fluid to the suction bell should be even, smooth and stream lined without any vortices. Various Auxiliary piping plan is recommended in API 610 for proper selection according to design requirements.

They can come pre-installed with the pump motor or you can often retrofit an existing pump but you should check with the manufacturer first to ensure compatibility. Additionally, you should check the system design to ensure it can handle the lower flow or head pressure. To obtain the performance details for variable speed pumps we have to calculate the values using pump affinity laws. These pumps will therefore have a chart with three different profiles plotted on them. In some instances our required flow rate and head pressure might fall between the two impeller diameter lines.

As we get all the way to the vertical position, there is zero water flowing out of the pump but maximum pressure. That’s because it’s using all its energy to push against the water and hold it as high as it possibly can within the pipe. At this point it’s just spinning the same bit of water which isn’t good for the pump so you don’t want to run a pump like this in the real world. By recording the values during this elevation, we basically get our performance curve. Although we will note that pump manufacturers don’t test pumps this way as it’s not practical.

The Most Important Parts Of A Pump: Casings & Impellers

If you use Oracle Data Pump Export or Import with Oracle Automatic Storage Management (Oracle ASM) enabled, then define the directory object used for the dump file. Dump files, log files, and SQL files are accessed relative to server-based directory paths. For dump files, you can use the Export REUSE_DUMPFILES parameter to specify whether to overwrite a preexisting dump file.

Vertical centrifugal pumps have many benefits which is why they’ve been a staple in industry for almost a hundred years. They are basically the best way to efficiently transfer liquid, and come in a space-saving package. The pumps are reliable, easy to maintain, and have an overall low lifetime cost. Installation is also generally affordable, and, further upping the savings, they’re energy efficient, too. The pump will inevitably lose some power when it converts and transmits the electrical energy into mechanical energy. This will be lost through the coupling, bearings, shaft, seals, cooling fan etc.

Vane Pump

Another popular option for pump selection software is Intelliquip. The Detailed Pump View widget displays flow and pressure data from the Integrated Pump driver. Both data points are charted in the line graph with selectable time span.

To avoid cavitation, the NPSHr should always be less than the Net Positive Suction Head available (NPSHa) provided by the sump. NPSHa represents the total suction head available at the Pump inlet and is calculated as the difference between the total suction head and the vapor pressure head. When the NPSHa is greater than NPSHr, the Pump is less likely to experience cavitation.

Real-time Data

The first piece of information provided by a pump curve is the flow that the pump will develop at any given operating head. The curve that provides this information is called the pump performance curve. The Export utility writes dump files using the database character set of the export system. Oracle Data Pump operations that transfer table data (export and import) maintain an entry in the V$SESSION_LONGOPS dynamic performance view indicating the job progress (in megabytes of table data transferred).

By default the dumpfile name of export job, if the clause is not specified is export.log. LOGFILE – This clause is used to specify the logfile name which is created in the directory specified by DIRECTORY clause. ATTACH – This clause is to attach a new datapump session to any existing JOB.

So the above expdp command would only export tables EMP & DEPT, PROCEDURE and all indexes starting with TEST% no other objects of TEST schema would be exported. That’s all…if you have any suggestions or any other queries to monitor datapump jobs status, please comment us. We will definitely go through it and will include in this article. As you can see in the illustration across and above pump curve there is a point typically midway curve known as the Best Efficiency Point which is the most efficient point at which the pump can be operated at.