There are many varieties of centrifuges . According to different speeds, they can be divided into low-speed centrifuges, high-speed centrifuges and ultracentrifuges. Low-speed centrifuges with speed less than 6000r/min, high-speed centrifuges below 25000r/min, and over 30000r /min is an ultracentrifuge; depending on the temperature control, it can be divided into a refrigerated centrifuge and a common centrifuge. The refrigerated centrifuge has a refrigeration system that can control the temperature to a minimum of -20 ° C. The ordinary centrifuge does not have a refrigeration system; Different uses can also be divided into a centrifuge and a centrifuge.
Commonly used electric centrifuges in the laboratory include low-speed, high-speed centrifuges and low-speed, high-speed refrigerated centrifuges, as well as overspeed analysis and preparation of dual-purpose refrigerated centrifuges. Among them, low-speed (including large-capacity) centrifuges and high-speed refrigerated centrifuges are the most common applications, and are essential tools for biochemical laboratories to prepare biomolecules separately.
1 ordinary (non-frozen) centrifuge
This kind of centrifuge is simple in structure and can be divided into two types: small table and floor type. It is equipped with drive motor, governor, timer, etc., and it is easy to operate. The speed of the low-speed centrifuge generally does not exceed 4000 rpm, and the maximum speed of the desktop high-speed centrifuge can reach 18000 rpm.
2 low speed refrigerated centrifuge
The normal speed does not exceed 4000 rpm, and the maximum capacity is 2~4L. It is most commonly used in the laboratory to extract biological macromolecules and sediments from a large number of primary sources. The rotary head and the angle type two kinds of centrifugal tubes made of aluminum alloy have various types of hard glass, polyethylene hard plastic and stainless steel tube. The centrifuge is equipped with a drive motor, timer, regulator (speed indication) and refrigeration system (temperature adjustable range is -20~+40°C), which can change the rotor of different capacity and different speed according to the needs of centrifugal materials. .
3 high speed refrigerated centrifuge
The speed can reach more than 20,000 rpm. In addition to the performance and structure of the low-speed refrigerated centrifuge, the angle rotor used in the high-speed centrifuge is made of titanium alloy and aluminum alloy. The centrifuge tube is a polyethylene hard plastic product with a cover. Such centrifuges are often used to collect microorganisms, cell debris, cells, large organelles, sulfate precipitates, and immunoprecipitates.
4 ultracentrifuge
The rotation speed can reach 30,000 rpm or more, and the subcellular organelle can be classified and used for the measurement of the molecular weight of proteins and nucleic acids. Its turning head is made of high-strength titanium alloy, which can be changed according to the needs of different speed and different types of rotating rotor. There are two types of ultracentrifuge drive motors, one for the FM motor to directly increase the speed, and the other for the speed increase through the gearbox. In order to prevent the drive motor from generating heat during high-speed operation, it is equipped with a cooling drive motor system (air-cooled, water-cooled), a speed limiter, a chronograph, a speed recorder, and the like. In addition, the ultracentrifuge is equipped with an evacuation system. Pavement Marking Tape
Pavement marking tape
Descriptions: Preformed reflective marking tape is embedded into micro reflective glass beads both on surface and body and has a durable,reflective and skid-proof effect. It's coated with special fiberglass reinforced ahesive, has super strong bond do different surfaces. It's designed to stripe asphalt parking lots,roads, bike paths and any other area where the road will subject to heavy traffic flow and high visibility delineation is needed. It has following features.
1.Reflective marking tape takes double layer compound structure and is characterized by high skid-resistance, excellent reflective visibility, vibrant color and the like. Furthermore, it can be made into different kinds of marking belt, arrowhead, word, and pattern.
2. Both of these two types can be quickly and easily applied to clean, dry, asphalt or concrete surfaces
3. High retro.-reflectivity all day long, anti-skid, high tensile, strong weather resistance, easy application.
Performance Life:
The performance life of pavement markings will depend on the following:
Traffic conditions; Snow removal practices; Pavement surfaces; Application techniques.
It is recommended that each customer thoroughly evaluate our Pavement Marking Tapes under the conditions in the specified location. While experience has shown that when properly applied, these materials are highly effective traffic control devices, our Technologies makes no generalized performance claims.
Standard Dimensions:
1. Standard length: 33m, 40m, 50m, 60m, 70m
2. Standard width: 15cm, 20cm, 25cm, 30cm, 35cm, 40cm, 45cm, 50cm; or according to customer's requirements.
3. available color: white, yellow, black, red, blue or other customized colors or patterns.Pavement marking tape, Preformed thermoplastic pavement marking tape, Preformed marking line
Kunshan Jieyudeng Intelligent Technology Co., Ltd. , https://www.yuhuanptapes.com