What is the function of the vacuum pump on the freeze dryer?

Summary. Why can the freeze dryer vacuum pump be opened 2 minutes after the start of the roots pump?

Hello dear, Roots vacuum unit is a vacuum unit composed of roots vacuum pump and backing pump in series. Generally, the vacuum limit can reach 2 Pa to Pa. Correct opening method of roots vacuum unit:

After connecting the unit to the pumped vessel, turn on the cooling water of the roots vacuum unit, turn on the backing pump, and then slowly open the main valve (generally the inlet valve of the roots vacuum pump), then the roots pump begins to follow, and when the container vacuum is pumped to 1000 to 500 Pa (simple judgment method: the roots pump does not follow), turn on the roots pump until you need the vacuum level. Why does the roots pump have to wait for the backing pump to be pumped to a certain vacuum?

Because of the high speed of the roots pump, if the vacuum is low, the air compression will produce a lot of heat energy when the pump rotates, and at the same time, the two "8" shaped rotors rotate the main force (the main factor), and the load of the motor is large, which may burn out the motor. I hope the above hand-made can help you.

Why can the freeze dryer vacuum pump be opened 2 minutes after the start of the roots pump?

Why does the vacuum pump of the freeze dryer start 2 minutes before the roots pump can be opened, the roots vacuum boring unit is a vacuum unit composed of roots vacuum pump and fore pump in series. Generally, the vacuum limit can reach 2 Pa to Pa. Correct opening method of roots vacuum unit:

After connecting the unit to the pumped vessel, turn on the cooling water of the roots vacuum unit, turn on the backing pump, and then slowly open the main valve (generally the inlet valve of the roots vacuum pump), then the roots pump begins to follow, and when the container vacuum is pumped to 1000 to 500 Pa (simple judgment method: the roots pump does not follow), turn on the roots pump until you need the vacuum level. Why does the roots pump have to wait for the backing pump to be pumped to a certain vacuum?

Because the speed of the roots pump is high, if the vacuum is low, the air compression will produce a lot of heat energy when the pump rotates, and the main force of the two "8" shaped rotors rotates at the same time (the main factor), and the load of the motor is large, which may burn out the motor. I hope the above hand-made can help you.

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Water ring pumps and vacuum pumps in lyophilization equipment are two commonly used types of pumps that have different functions during use.

Water Ring Pump: The water ring pump is a kind of vacuum pump that is often used to build a water ring to form a vacuum during rotation. The main features are:

Suction and discharge of gas: The water ring pump rotates, sucks in the gas, compresses it, and then discharges it from the outside of the equipment. It can realize the treatment and control of the gas inside the equipment.

Negative pressure generation: When the water ring pump rotates, it builds a water ring to form a vacuum and create a negative pressure environment for adsorption and pumping of liquids or gases.

Vacuum pump: A vacuum pump is a device that mechanically and physically creates a low-pressure or high-vacuum environment. The main features are:

Emptying: Vacuum pumps are capable of removing air or other gases from a closed vessel or system, allowing the cavity to be removed.

Provide a vacuum environment: Vacuum pumps can create a low-pressure or high-vacuum ring nucleus in the equipment for the implementation of other processes such as lyophilization, distillation, degassing, etc.

In summary, the water ring pump is mainly used for the intake and discharge of gases to create a negative pressure environment, while the vacuum pump is used to remove air and provide a vacuum environment. The two are often used in combination in lyophilization equipment to meet the different needs of the equipment.

Summary. Hello, I'm glad to answer for you, vacuum dryer and freeze dryer are not the same, the difference is: 1. The vacuum dryer is designed for drying heat-sensitive, easily decomposable and oxidizing substances, and can be filled with inert gas inside, especially some items with complex compositions can also be dried quickly, 2. Lyophilizer:

The principle is to prefreeze the moisture in the material (solid), and then sublimate the frozen moisture in the material in a vacuum environment to obtain a dry material (the liquid state becomes solid and becomes gaseous). The shape, color and taste are basically unchanged, and the nutrients and physiologically active ingredients of the product are not lost or destroyed to the greatest extent. It improves the product quality and appearance performance, and has good rehydration, after immersion in water, it can quickly absorb water and recover, just like a fresh product.

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Hello, I'm glad to answer for you, vacuum dryer and freeze dryer are not the same, the difference is: 1. The vacuum dryer is designed for drying heat-sensitive, easy to decompose and easily oxidized substances, and can be filled with inert gas inside, especially some items with complex compositions can also be dried quickly, 2. Freeze dryer: The principle is to prefreeze the moisture in the material (solid), and then sublimate the frozen moisture in the material in the vacuum environment to obtain the dry material (liquid becomes solid and becomes gaseous).

The shape, color and taste are basically unchanged, and the nutrients and physiologically active ingredients of the product are not lost or destroyed to the greatest extent. It improves the product quality and appearance performance, and has good rehydration, after immersion in water, it can quickly absorb water and recover, just like a fresh product.

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Freeze dryer vacuum pump oil injection pro, Lu with hello! After a long time of use of the vacuum pump, there will be problems such as oil injection and oil leakage, so how to solve it? If the problem is not very serious, you can disassemble the vacuum pump by yourself, replace the wearing parts and clean and assemble it to achieve the purpose of maintenance.

Regarding how to disassemble and wash, Howke has sorted out the solution for you for your reference! First of all, when cleaning the vacuum pump, it should be carried out in a clean environment, and there should be no debris, dust, water sources, and areas with excessive temperature. Before installation, check that the motor is consistent with the rotor steering in the pump, and the normal operation direction of the motor is marked above the motor.

If it has not been running for a long time, the vacuum pump should be started several times intermittently. Please note that if the vacuum pump has the potential danger of inhaling impurities, dust, moisture, chemicals, etc., a precision filter should be installed at the air inlet of the vacuum pump. Hope it helps!