1, speed 2, fat ball diameter 3, disk radius 4, disc size elevation 5, fat containing cream control rate (1) in the choice of separation, we should consider the actual production capacity to be appropriate.
(2) The separator should have a solid foundation and the components of the horizontal axis of the vertical axis of rotation should be accurately installed.
(3) When driving, you must check the transmission mechanism and fasteners that cannot be reversed to prevent malfunction.
(4) The pressure of the separator is closed to send start and stop, we need to replace the milk from the water.
(5) Continuous running time, physical properties of the materials used, and determination of the concentration of impurities.
(6) Under appropriate conditions, the separation of the closed pressure has a certain pressure, and therefore in a fixed number of rotary pumps or special centrifugal pumps, every effort is made to prevent pump pulses.
(7) Pay full attention to and check the suction pipe of the pump, the tension of the pump shaft gasket, etc., to prevent air mixing.
(8) Disassemble and clean immediately after the operation is completed, and prepare to be reused in the future.
How to choose a precision centrifuge, the general centrifuge only needs to choose according to the size of the workload, from the two aspects of speed and capacity. We should consider the following five issues to be considered when choosing a precision centrifuge from the following five aspects:
(1) Rotating speed: Centrifuge is divided into low speed centrifuge (<10000rpm/min), high speed centrifuge (10000rpm/min 30,000rpm/min), ultra high speed centrifuge (>30000rpm/min) according to the different speed of zui. Each centrifuge has a rated speed of zui, and the large speed of zui refers to the speed under no-load conditions, but the large speed of zui varies depending on the type of rotor and the quality of the sample. For example, the rated speed of a centrifuge is 16000 rpm/min, which means that the rotor rotates 16,000 times per minute at no load. After adding the sample, the speed will definitely be less than 16000 rpm/min. Different rotors, zui large speed is also different (one imported centrifuge can be equipped with multiple rotors), the horizontal rotor can reach 15000rpm/min, but the angular rotor can reach 14000rpm/min. The specific difference should be consulted in detail. And the relevant technical personnel of the production plant, so the choice of the speed should be cautious, the Zui large speed of the selected centrifuge should be higher than the target speed. For example, the target speed is 16000 rpm/mIn, and the large speed of the selected centrifuge must be higher than 16000 rpm/min.
(2) Temperature: Some samples (such as proteins, cells, etc.) will be destroyed under high temperature conditions. This is to choose a refrigerated centrifuge. The refrigerated centrifuge has a rated temperature range. The heat generated by the centrifuge at high speed is balanced with the refrigeration system of the centrifuge at a certain temperature (the sample for general freeze centrifugation needs to be kept at 3 ° C ~ 8 ° C), and the specific amount can be related to the rotor, such as a centrifuge The rated temperature range is -10 ° C ~ 60 ° C, the horizontal rotor can be rotated to about 3 ° C when installed, if the angle rotor may only be about 7 ° C. This should also be consulted in detail about the product sales staff and the relevant technical personnel of the production plant.
(3) Capacity: How many sample tubes need to be centrifuged each time 7 How much capacity is needed for each sample tube 7 These factors determine the total capacity of a centrifuge, simply the total volume of the centrifuge = the capacity of each centrifuge tube × centrifugation The number of tubes, the total capacity and the size of the workload are matched.
(4) Rotor: The rotor of the centrifuge is mainly divided into two types: horizontal rotor: the running blue is in a horizontal state during operation, at right angles to the rotating shaft, and the sample concentrates the sediment on the bottom of the centrifuge tube: the angle rotor: the centrifugal container is fixed with the rotating shaft At the angle, the sample concentrates the sediment on the bottom of the centrifuge tube and the side wall near the bottom. If you want the separated sample to be concentrated at the bottom of the centrifuge tube, select the horizontal rotor. If you want the sample to concentrate on the bottom of the centrifuge tube and the side wall near the bottom, select the angle rotor.
There are also special tests or special samples that require special rotors such as large-capacity baskets (used for blood stations), ELISA plate rotors, slide rotors, PCR rotors, test tube rotors, and capillary rotors. The rotor has a fixed size, which is combined with the capacity of the centrifuge, such as the 36 × 5ml angle rotor, which determines the type of rotor and determines the capacity of the centrifuge, so the choice of the rotor is very important.
(5) Control system: High-end centrifuges use microcomputer control systems. These control systems not only ensure the safe operation of the centrifuge but also automatically complete the task. Now many centrifuges have a better humanized control system. For example: rotor identification function, safety lock function, fault prompt function, acceleration and deceleration curves, and so on. In addition to the above points, pay attention to some details and necessary accessories. The main component of the centrifuge is the motor. The motor is divided into a carbon brush motor and a carbonless brush motor. The former has been eliminated. Most of the current centrifuges are brushless motors, and some motors also have a brake function. Refrigerated centrifuges also differ in terms of refrigeration, and now environmentally friendly technologies are of course fluorine-free refrigeration. In addition to this, consider the noise problem and try to choose a quieter centrifuge to maintain a comfortable experimental environment. Care should be taken in the accessories. In some experiments, special centrifuge tubes (centrifugal toxic samples or samples requiring ultra-high-speed centrifugation) should be used. Such centrifuge tubes must be equipped with corresponding sleeves for safety. There are also some special sample containers (irregular vials, blood bags, etc.). These details and accessories must be carefully considered when selecting a centrifuge, otherwise normal operation will not be possible.
Shanghai Island Han Industrial Co., Ltd. specializes in the research and development of scientific instruments and environmental equipment. It operates all kinds of drying ovens, incubators, test chambers, oscillators, and agents.
(2) The separator should have a solid foundation and the components of the horizontal axis of the vertical axis of rotation should be accurately installed.
(3) When driving, you must check the transmission mechanism and fasteners that cannot be reversed to prevent malfunction.
(4) The pressure of the separator is closed to send start and stop, we need to replace the milk from the water.
(5) Continuous running time, physical properties of the materials used, and determination of the concentration of impurities.
(6) Under appropriate conditions, the separation of the closed pressure has a certain pressure, and therefore in a fixed number of rotary pumps or special centrifugal pumps, every effort is made to prevent pump pulses.
(7) Pay full attention to and check the suction pipe of the pump, the tension of the pump shaft gasket, etc., to prevent air mixing.
(8) Disassemble and clean immediately after the operation is completed, and prepare to be reused in the future.
How to choose a precision centrifuge, the general centrifuge only needs to choose according to the size of the workload, from the two aspects of speed and capacity. We should consider the following five issues to be considered when choosing a precision centrifuge from the following five aspects:
(1) Rotating speed: Centrifuge is divided into low speed centrifuge (<10000rpm/min), high speed centrifuge (10000rpm/min 30,000rpm/min), ultra high speed centrifuge (>30000rpm/min) according to the different speed of zui. Each centrifuge has a rated speed of zui, and the large speed of zui refers to the speed under no-load conditions, but the large speed of zui varies depending on the type of rotor and the quality of the sample. For example, the rated speed of a centrifuge is 16000 rpm/min, which means that the rotor rotates 16,000 times per minute at no load. After adding the sample, the speed will definitely be less than 16000 rpm/min. Different rotors, zui large speed is also different (one imported centrifuge can be equipped with multiple rotors), the horizontal rotor can reach 15000rpm/min, but the angular rotor can reach 14000rpm/min. The specific difference should be consulted in detail. And the relevant technical personnel of the production plant, so the choice of the speed should be cautious, the Zui large speed of the selected centrifuge should be higher than the target speed. For example, the target speed is 16000 rpm/mIn, and the large speed of the selected centrifuge must be higher than 16000 rpm/min.
(2) Temperature: Some samples (such as proteins, cells, etc.) will be destroyed under high temperature conditions. This is to choose a refrigerated centrifuge. The refrigerated centrifuge has a rated temperature range. The heat generated by the centrifuge at high speed is balanced with the refrigeration system of the centrifuge at a certain temperature (the sample for general freeze centrifugation needs to be kept at 3 ° C ~ 8 ° C), and the specific amount can be related to the rotor, such as a centrifuge The rated temperature range is -10 ° C ~ 60 ° C, the horizontal rotor can be rotated to about 3 ° C when installed, if the angle rotor may only be about 7 ° C. This should also be consulted in detail about the product sales staff and the relevant technical personnel of the production plant.
(3) Capacity: How many sample tubes need to be centrifuged each time 7 How much capacity is needed for each sample tube 7 These factors determine the total capacity of a centrifuge, simply the total volume of the centrifuge = the capacity of each centrifuge tube × centrifugation The number of tubes, the total capacity and the size of the workload are matched.
(4) Rotor: The rotor of the centrifuge is mainly divided into two types: horizontal rotor: the running blue is in a horizontal state during operation, at right angles to the rotating shaft, and the sample concentrates the sediment on the bottom of the centrifuge tube: the angle rotor: the centrifugal container is fixed with the rotating shaft At the angle, the sample concentrates the sediment on the bottom of the centrifuge tube and the side wall near the bottom. If you want the separated sample to be concentrated at the bottom of the centrifuge tube, select the horizontal rotor. If you want the sample to concentrate on the bottom of the centrifuge tube and the side wall near the bottom, select the angle rotor.
There are also special tests or special samples that require special rotors such as large-capacity baskets (used for blood stations), ELISA plate rotors, slide rotors, PCR rotors, test tube rotors, and capillary rotors. The rotor has a fixed size, which is combined with the capacity of the centrifuge, such as the 36 × 5ml angle rotor, which determines the type of rotor and determines the capacity of the centrifuge, so the choice of the rotor is very important.
(5) Control system: High-end centrifuges use microcomputer control systems. These control systems not only ensure the safe operation of the centrifuge but also automatically complete the task. Now many centrifuges have a better humanized control system. For example: rotor identification function, safety lock function, fault prompt function, acceleration and deceleration curves, and so on. In addition to the above points, pay attention to some details and necessary accessories. The main component of the centrifuge is the motor. The motor is divided into a carbon brush motor and a carbonless brush motor. The former has been eliminated. Most of the current centrifuges are brushless motors, and some motors also have a brake function. Refrigerated centrifuges also differ in terms of refrigeration, and now environmentally friendly technologies are of course fluorine-free refrigeration. In addition to this, consider the noise problem and try to choose a quieter centrifuge to maintain a comfortable experimental environment. Care should be taken in the accessories. In some experiments, special centrifuge tubes (centrifugal toxic samples or samples requiring ultra-high-speed centrifugation) should be used. Such centrifuge tubes must be equipped with corresponding sleeves for safety. There are also some special sample containers (irregular vials, blood bags, etc.). These details and accessories must be carefully considered when selecting a centrifuge, otherwise normal operation will not be possible.
Shanghai Island Han Industrial Co., Ltd. specializes in the research and development of scientific instruments and environmental equipment. It operates all kinds of drying ovens, incubators, test chambers, oscillators, and agents.
The fundamental difference from traditional electric scooters, battery scooters, bicycles and other transportation tools is that electric wheelchairs have intelligent operating controllers. According to the different operation methods, there are rocker-type controllers, and controllers controlled by various switches such as the head or blowing system. The latter is mainly suitable for severely disabled people with upper and lower limbs. Nowadays, electric wheelchairs have become an indispensable means of transportation for the elderly and the disabled. It is suitable for a wide range of objects. As long as the user has a clear consciousness and normal cognitive abilities, the use of electric wheelchairs is a good choice, but it requires a certain amount of space for activities.
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