Naipu ISW end suction pumps designed in accordance with ISO2858 standard,are single-stage single-suction horizontal centrifugal pumps featured by integrated simple construction for less space, easy installation, smooth operation with less noise and free of daily maintenance due to the introduction of high quality mechanical seals and closed coupling.
Typical Applications---
Various kinds of industrial application
ISW End Suction Pump Configuration Drawing
Main Part Number At The Drawing
ISW END SUCTION PUMP SELECTION CHART
NP- ISW END SUCTION PUMP PERFORMANCE PARAMETERS
ISW End Suction Pump,End Suction Pump,Clear Water Pump,End Suction Water Pump Shijiazhuang Naipu Pump Co., Ltd. , https://www.naipu-pump.com
1. Mains voltage instability Normal home DVR switching power supply operating voltage range 170V-240V, when the mains voltage is lower than 170V, the hard disk recorder will automatically restart or shut down. Because of the volatility of the mains voltage, we sometimes do not feel it, so we will mistakenly think that the hard disk video recorder has somehow automatically restarted.
Solution: For areas with frequent unstable power supply, we can purchase UPS power supply or wide-range switching power supply of 130-260V to ensure the stable operation of the DVR. A professional hard disk recorder is preferably a 300-400V power supply. 2. The quality of the sockets or power outlets is poor. Most of the power strips on the market are of poor quality. The internal contacts are all hand-welded, and acidic fluxes are often used. This can easily lead to oxidation of solder joints in later use. Breakage or leakage between live and neutral lines. Because of manual welding, and because of the poor elasticity of the phosphor bronze sheet, it is easy to lose the elasticity in a long time, resulting in poor contact with the host or the power plug of the display and resulting in a large contact resistance. A large amount of heat will cause a virtual connection. This will be a host reboot or a black screen flash.
Another possibility is that we use wall sockets in our homes. Most of the wall sockets are not installed by professionals. Therefore, the internal wiring of the sockets is very non-standard. In particular, these sockets are very easy if we often use high-power electric heaters. Causes an internal heating oxidation to form an intermittent power failure, causing the hard disk recorder to restart or the display to blink.
Solution: 1 Do not plan to save money and buy inexpensive power strips, buy some brand-name power strips, because the inside of the machine are automatically installed crimped, did not use manual welding. 2 For the question of whether it is a virtual connection inside the wall socket, we can try the host for a wall outlet and see if there is the same problem of automatic restart.
3. The power shortage or poor performance of the DVR power supply is also more common, especially when we add a new device to our host, such as replacing the high-end graphics card, adding DVD/index.shtml`target=`_blank` The class=`article` burner, after adding the hard disk, is very easy to appear. When the host computer works at full speed, such as running monitoring software, recording at a high speed or preparing to read the optical disk, just when the dual hard disk copy data, it may cause power protection due to insufficient instantaneous power supply to stop the output, but when the power is stopped After the output, the load is reduced and the power supply starts again. Because the recovery time after protection is very short, the performance given to us is that the host automatically restarts.
In another case, the performance of the host switching power supply is poor, although the voltage is stable and within the normal allowable range, but because the harmonic content in the output power is too large, it will cause the host to often crash or restart. For this situation, it is normal that we use a multimeter to test its voltage. It is better to replace a good power supply for replacement. Solution: Replace the high-quality, high-power DVR power supply.
4. The mains power plug of the main switch power supply is loose, and the contact is not good. The majority of the power plugs do not fit in the DIY machine. The mains power supply has not passed the 3C certification and is not compatible with the power outlet. When we shake the desk or touch the main unit, the main unit will automatically restart. Usually it will be accompanied by a slight electric spark.
Solution: Replace the high quality 3C certified power cord.
5. The ATX20 socket of the motherboard power supply is soldered. This fault is not common, but it does exist. The main reason is that when the host computer is working normally, move the ATX20 pin plug around to see if the host will restart automatically. At the same time, check whether the reed inside the 20-pin power plug is oxidized. This can easily lead to large contact resistance, poor contact, and cause the host to crash or restart. Sometimes it is necessary to check whether the connecting wire at the end of the 20-pin plug is secure.
Solution: 1 If it is the motherboard solder joints, it can be directly soldered with soldering iron. Note: When welding DVR boards such as motherboards, hard disks, and video cards, be sure to ground the soldering iron properly or unplug the power plug during soldering. 2 If it is a power problem, it is best to replace a good power supply.
6. CPU problem The internal function circuit of the CPU is damaged. When the secondary cache is damaged, the hard disk recorder can also be started. It will even enter the normal desktop for normal operation, but it will restart or crash when performing a special function, such as a painting table. Play VCD, play games and more.
Solution: Try to mask the L2 or L1 cache in CMOS to see if the host can run normally; instead, replace it with a good CPU. If it can be normally operated after being screened, it can still make use of it. Although it is slower, it will actually save money.
7. Memory Problems If a chip is not completely damaged on the memory module, it is likely to pass the self-test (mostly POST is set), but at run time it will restart unexpectedly due to the large amount of memory heat that causes the function to fail. Most of the time when the memory is damaged, it will open the alarm, but it will not alarm after the memory is damaged, and there are still some failures without power-on. It is best to use the elimination method to quickly determine the fault location.
8. Optical drive problems If the optical drive is damaged internally, it may cause the host to start slowly or fail the self-test, or it may suddenly restart during work. For the latter case, if we have replaced the optical drive, it is likely that the power consumption of the optical drive is different. What everyone needs to understand is that although the optical drive's ATPI interface is the same, the pin definitions of different manufacturers are not the same. If there is a problem with our hard disk line, it may cause no problem for the use of a certain brand of optical drive, but for other The situation that the brand optical drive cannot work will require everyone's attention.
9. RESET key quality problems If the RESET switch is damaged, the internal reed is always in the short-circuited position, the host can not power-up self-test. However, when the RESET switch is weakened elastically or the button on the chassis is not easily pressed to spring up, it will appear during use because the host suddenly restarts by accidentally touching the chassis or under normal use. Therefore, when the RESET switch can not be pressed freely, we must carefully check, it is best to replace the new RESET button switch or external lubrication button on the chassis.
There is also a situation where the insulation layer of the RESET switch leads in the chassis is stripped too much during the soldering process. In addition, the unstacking of the RESET switch in the process may cause the RESET switch line to be too close to cause a collision, causing the host to restart automatically. 10. Access network card or parallel port, serial port, USB interface automatically restarts when accessing external devices This is generally due to external failure, such as the printer's parallel port is damaged, a foot to ground short circuit, USB device damage to the ground short circuit, network card work Non-standard and so on, when we use these devices, the hard disk recorder will restart due to a sudden power short circuit.
Water supply system
Lowering underground water level
Boosting
Gardening and aricultural irrigation
2 Shaft
3 Deflector
4 Mechanical Sea
6 Pump Casing
7 Pressure Release Plug
8 Impeller
How to solve hard disk recorder hardware failure
Main Products: DVR, hemispherical infrared cameras, infrared waterproof camera, integrated camera, video camera hemisphere <br> <br> main DVR has some less common hardware failure, a brief introduction solution:
1 Motor
5 Pressure Monitoring Hole