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vacuum pump & cold trap chiller
The laboratory vacuum pump is designed to reduce the pressure inside the system, thereby lowering the boiling point of the solvent. By lowering the boiling point, the solvent evaporates at a much lower temperature, reducing sample degradation.
A cold trap is a device that condenses vapors except permanent gases into a liquid or solid in vacuum applications. Its primary objective is to prevent vapors from entering a vacuum pump and causing contamination.
There are various types of lab vacuum pumps, including oil-free, belt-driven, and diaphragm pumps. Some of the most typical types are Rotary Vane, Rotary Screw, Diaphragm, Piston, and Diffusion.
Lab vacuum pumps are widely used in processes such as filtering, drying, distillation, extraction, chromatography, and more.
Oil-based pumps, such as diffusion and mechanical rotary pumps, are common sources of contamination in vacuum systems due to their use of oil as either a working fluid or lubricant.
To prevent oil vapors from entering the cavity, a cold trap can be placed at the mouth of the pump. This greatly reduces the risk of backstreaming and contamination.
FAQ
What is a cold trap chiller in lab?
A cold trap chiller is a device used in laboratory equipment to protect vacuum pumps from contamination by condensing or sublimating vapors in a separate apparatus. It prevents oil vapors from backstreaming from the pump into the system and maintains a chilled stainless steel or glass surface for vapors to condense or sublimate on. The device utilizes an active material such as dry ice or liquid nitrogen or a Peltier element for cooling and can be disassembled for easy cleaning. Cold traps are essential for efficient pump operation and longer service lives.
What is laboratory vacuum pump?
A laboratory vacuum pump is a tool used to create a low-pressure environment inside a closed system, allowing various scientific processes such as vacuum filtration, aspiration, and solvent evaporation. They work by removing gas molecules from a sealed volume, creating a partial or complete vacuum. There are different types of vacuum pumps used in laboratory applications, including rotary vane, diaphragm, and scroll vacuum pumps.
What is the purpose of a cold trap chiller?
The purpose of a cold trap chiller is to protect vacuum pumps from contamination by condensing or sublimating vapors and preventing oil vapors from backstreaming into the system. It provides a chilled surface for vapors to condense or sublimate on and utilizes an active material such as dry ice or liquid nitrogen or a Peltier element for cooling. Cold traps are most commonly used to collect vapor from applications involving rotating discs or vacuum systems, but can also be used on other types of contamination including solids. Cryogenic cold traps are specifically manufactured for cryogenic applications such as the adsorption of noble gases.
What is the purpose of vacuum pump in laboratory?
The purpose of a laboratory vacuum pump is to aid in a wide variety of research applications. It is mainly used to provide suction for filtration or aspiration of liquid samples and regulate solvent evaporation by reducing vapor pressure. It can also improve instrument-detection sensitivity, collect gas samples, and provide a negative pressure environment to prevent potentially hazardous sample materials from escaping. Vacuum pumps are designed to move air or vapors, not liquids or suspensions. They are an adaptable tool that can be useful to many research scientists and engineers.
Why is a cold trap placed before the vacuum pump?
A cold trap is placed before the vacuum pump to prevent vapors, such as vapor from water or solvents, from contaminating the vacuum pump and the airstream. The cold trap condenses or sublimates gases, preventing them from reaching areas of the system that could lead to malfunction. Cold traps collect vapor from applications involving rotating discs or vacuum systems and oil vapors from a pump to prevent them from flowing into the chamber. By using a cold trap, vacuum pumps operate more efficiently and have longer service lives.
What is the use of pump in laboratory?
Pumps are commonly used in laboratories to provide suction for the filtration or aspiration of samples, and to reduce vapor pressure in instruments such as rotary evaporators and lab ovens. Liquid pumps, including syringe, peristaltic, and metering pumps, are used to dispense and transfer fluids. When choosing a laboratory pump, it is important to determine the type of pump that best fits the research needs, such as the required level of vacuum for evaporative applications or freeze drying. Overall, laboratory pumps are adaptable tools that aid a wide range of research scientists and engineers in various applications.
What is used in a laboratory to form and contain a vacuum?
A laboratory vacuum pump is used to form and contain a vacuum by removing air or gas molecules from a sealed chamber or system. The vacuum pump creates negative pressure, which can be used for a variety of applications such as filtration, aspiration of liquid or suspended samples, and solvent evaporation. Different types of pumps, including rotary vane, diaphragm, and turbomolecular pumps, are available, and the choice depends on the required vacuum level and the specific application. It's important to choose the right vacuum pump for the intended use to ensure optimal performance and reliability.
How does a laboratory vacuum pump work?
A laboratory vacuum pump works by removing gas molecules from a sealed volume, creating a partial or complete vacuum. The pump creates a difference in pressure between the system and the outside atmosphere, causing gas molecules to move toward the pump and away from the system. As molecules are removed from the vacuum space, it becomes harder to remove additional ones, thus increasing the vacuum power required. Different types of vacuum pumps are used depending on the application, including rotary vane, diaphragm, and scroll vacuum pumps. Vacuum pumps are classified by the pressure range they can achieve to distinguish their capabilities.
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