Dengan ketergantungan dari spesific speed dari pompa sentrifugal, maka impeller berbentuk :
Radial impeller, mixed flow impeller, atau axial impeller (propeller). Radial dan mixed flow impeller dapat di buat tanpa penutup bagian depannya (cover plate) dan lebih di kenal dengan open impeller, atau dengan penutup pada bagian depannya yang di kenal dengan impeller tertutup (closed impeller).
Dari ketiga jenis impeller tersebut ada juga impeller dengan bentuk-bentuk khusus untuk di pergunakan memompakan cairan-cairan seperti :
Single vane impeller, non clogging impeller, free flow impeller (vortex impeller) dan lain-lain.
Dari jenis -jenis impeller tersebut maka orang sering menamakan jenis-jenis pompa seperti :
Axial pumps, Non clogging pumps, Mixed flow pumps, Vortex pumps dan lain-lain..
Lebih jelasnya mengenai type impeller silahkan baca juga
1. Type impepeller bagian 1
2. Type impeller bagian 2
Kamera Nikon Coolpix S520 (Alnet Computer)
Satu lagi website yang menawarkan cara belanja secara Online.
alnet computer adalah website yang bergerak di bidang teknologi dan industri menawarkan belanja secara online dari beberapa kebutuhan elektronik. Beberapa produk yang di tawarkan dari komputer,Media player, laptop, USB, speaker, keyboard,networking,gadget dan masih banyak lagi produk-produk lain yang di tawarkan. Makanya buruan datang ke alnet computer.
Salah satu produk yang di tawarkan adalah Kamera Nikon Coolpix S520 .
Terpadu pada aplikasi yang dapat diatur khusus pada Nikon inovatif EXPEED konsep pengolahan gambar digital dan menggabungkan ketepatan optic dari lensa Nikkor, COOLPIX S520 membuatnya mudah untuk mengekspresikan ekspresi individual kedalam mode yang indah.
Berikut spesifikasi dari Kamera Nikon Coolpix S520 :
Max. Resolution 8.0 Megapixels (Effective)
Sensor Size/Type 1/2.5'' CCD
Zoom Capability 3x Optical Zoom-Nikkor + Up 4x Digital Zoom
Focal Length (35mm Eqv.) 5.7 - 17.1 mm (35 ~ 105 mm Equivalent with 35mm)
Max Aperture f/2.8 (W) ~ 4.7 (T)
Lens Mount No
Lebih jelasnya silahkan klik link berikut
http://www.alnect.net/products.php?/10/56/125/207/Gadget/Digital_Camera/Nikon/Kamera_Nikon_Coolpix_S520
-------------------------------------------------------------------------------------
Sebagai wujud kepedulian alnet computer terhadap blogger Indonesia, Alnet computer mengadakan "Alnet komputer Blog Contest Periode 1" Dan Rebutlah Hadiah menarik dari alnet berupa :
•1 Unit Notebook Acer Aspire
•1 Unit Netbook Advan A1N70T
•1 Unit Camera Digital Shitel DB702C
•5 Unit Modem HSDPA Prolink PHS100
•10 Unit USB Flash Disk Kingston DT-G2 Kapasitas 8GB
•100 Unit USB Flash Disk Kingston DT-G2 Kapasitas 4GB
Untuk berpartisipasi silahkan Daftar di sini atau ambil tiketnya Disini
Jangan kuatir semuanya gratis atau tanpa di pungut biaya apapun.
SHAFT COUPLING CENTRIFUGAL PUMP
Shaft coupling used with centrifugal pumps can be divided into rigid and flexible types. Rigid couplings are mainly used to connect shafts in perfect alignment. The smallest degree of misalignment will cause considerable stress on the coupling and to the shafts. The following types are used:
Sleeve couplings
Muff coupling
Serrated couplings
Split couplings (DIN 115)
Face plate couplings (DIN 758, DIN 759)
Flange couplings
Flexible couplings to DIN 740 are elastic; slip free connecting elements between drive and driven machine which accommodate axial, radial and angular misalignment (Fig.1) and damp shock loads. The flexibility is usually achieved by the deformation of damping and rubber elastic spring elements whose life is governed to a large extent by the degree of misalignment.
Fig. 1 Misalignment
Fig.2 shows a spacer coupling between a pump and drive, its function is to permit removal of the pump rotating assembly without disturbing the casing or drive (back pull out design).
Fig.2 Pumps with spacer couplings
Sleeve couplings
Muff coupling
Serrated couplings
Split couplings (DIN 115)
Face plate couplings (DIN 758, DIN 759)
Flange couplings
Flexible couplings to DIN 740 are elastic; slip free connecting elements between drive and driven machine which accommodate axial, radial and angular misalignment (Fig.1) and damp shock loads. The flexibility is usually achieved by the deformation of damping and rubber elastic spring elements whose life is governed to a large extent by the degree of misalignment.
Fig. 1 Misalignment
Fig.2 shows a spacer coupling between a pump and drive, its function is to permit removal of the pump rotating assembly without disturbing the casing or drive (back pull out design).
Fig.2 Pumps with spacer couplings
PUMP SUMP CONFIGURATION
Pump sumps are designed to receive liquids and be intermittently drained. The sump size depends on the capacity Q and permissible start-up frequency Z of the pump set The electric motor.
The start up frequencies of any dry motors are as follows :
Motor rating Start up frequency
Up to 7.5 kW max. 15/h
Up to 30 kW max. 12/h
Above 30 kW max. 10/h
Start up frequency is calculated using :
The maximum start up frequency occurs when Qm = 2 x Qzu, when the capacity Qm is twice the incoming flow Qzu. The max. start up frequency is there fore :
With the dry liquids, solids must be prevented from being deposited and collecting in dead zones and on the floor. 450 walls, or better still 600 walls, help prevent this (see fig.1)
The start up frequencies of any dry motors are as follows :
Motor rating Start up frequency
Up to 7.5 kW max. 15/h
Up to 30 kW max. 12/h
Above 30 kW max. 10/h
Start up frequency is calculated using :
The maximum start up frequency occurs when Qm = 2 x Qzu, when the capacity Qm is twice the incoming flow Qzu. The max. start up frequency is there fore :
With the dry liquids, solids must be prevented from being deposited and collecting in dead zones and on the floor. 450 walls, or better still 600 walls, help prevent this (see fig.1)
Langganan:
Postingan (Atom)