China high quality Anti Corrosive Diaphragm Vacuum Pump for Lab Rotary Evaporator vacuum pump

Product Description

Anti Corrosive Diaphragm Vacuum Pump for Lab Rotary Evaporator


Anti-corrosion diaphragm vacuum pump it is used to provide vacuum conditions for evaporation, distillation, crystallization, drying, sublimation, filtration decompression, degassing, as well as solvent recovery, a variety of highly toxic, flammable and explosive, strong acid, strong alkali extraction, etc. Its advanced design, high efficiency, long service life, is a new generation of high-tech products in one. In addition to the applicable occasions of circulating water vacuum pump and rotary vane vacuum pump, it is also used in the fields of medical and pharmaceutical product analysis, fine chemical industry, biochemical and pharmaceutical, food inspection, criminal investigation technology, etc. It is a product for precision chromatography instruments and 1 of the laboratory equipment.


1. Vacuum filtration 

2. Vacuum distillation

3. Vacuum adsorption

4. Solvent filtration

5. CZPT phase extraction

6. Degasification

7. For compression and air conversion gas


1. No need for any working medium (no oil), no pollution, while the machine has filtering material built into the gas exchange bin, thus ensuring the purity of the air.

2. New technology and new materials are used in the production process. It is easy to move and works smoothly, thus ensuring ideal vacuum and high air flow rate.

3. Motor reasonable rotation design, equipped with overheating power-off protector, automatic power-off after the temperature of the pump body reaches 130 ºC, long-term running conditions to protect the motor from damage.

4. Adopt frictionless membrane movement, no heat generation, no friction loss. The diaphragm is made of imported rubber, which is corrosion resistant and has a long service life.

5. The machine is designed with automatic cooling and exhaust system, which can ensure 24 hours continuous operation.

6. With adjustable pressure design, it can meet the vacuum degree and gas flow rate in a certain range.

7. The bearings are imported classic bearings with smooth running, low noise and high working efficiency.

8. The parts of the anti-corrosion pump that are in contact with gas are treated with PTFE surface, which has complete resistance to chemical corrosion.  

9. Small size, light weight, easy to move, save lab space, easy to repair and maintain.

Anti-corrosion PTFE Features:

The anti-corrosion pump is characterized by its PTFE treatment and PTFE material in contact with gas, which is resistant to strong acid and alkali and suitable for corrosive chemical, pharmaceutical, petrochemical gases, etc. This pump is suitable for vacuum filtration, reduced pressure distillation, rotary evaporation, vacuum concentration, centrifugal acceleration, CZPT phase extraction, etc. It is a cost-effective product with reliable quality and unique structure design, which is suitable for most experimental needs.

1. Corrosion resistant, able to withstand almost all strong acids (including CZPT regia), strong bases, strong oxidizers, reducing agents and various organic solvents.

2. High and low temperature resistance, little change in temperature, wide temperature range, PTFE material can withstand temperatures of -190 ~ 260 ºC.

3. Non-stick surface, high insulation, high lubrication, most of the impurity particles can not adhere to the surface.

Product Parameters:

Model GM-0.20 GM-0.33A GM-0.5A GM-0.5B GM-1.0A
Pumping Rate 12L/Min 20L/Min 30L/Min 60L/Min
Pump Head Single Double
Noise <60db
Ultimate Pressure ≥0.075Mpa ≥0.08Mpa ≥0.095Mpa ≥0.08Mpa
Vacuum Degree 250mbar 200mbar 50mbar 200mbar
Positive Pressure ≥30Psi _ ≥30Psi _ ≥30Psi
Air Inlet Φ6mm
Air Outlet Φ6mm Built-in silencing cotton Φ6mm Silencer Φ6mm
Power 75W 160W
Power Supply Power Supply
Overall Size (mm) 195x98x156 215x120x235 210x160x235 300x120x235
Weight 4kg 7.5kg 8kg 10kg

Our Service


After-sales Service: 24 Hours Online
Warranty: One Year
Oil or Not: Oil Free
Structure: Diaphragm Vacuum Pump
Exhauster Method: Positive Displacement Pump
Vacuum Degree: High Vacuum


Vacuum Pump

How to check the vacuum pump

A vacuum pump is a machine that draws gas molecules from a volume and maintains a partial vacuum. Its main job is to create a relative vacuum within the stated capabilities. If your vacuum pump isn’t working properly, it may need service. Read on to learn more about the types of vacuum pumps and how to check them.

Principle of industrial vacuum pump

Industrial vacuum pumps are used in industrial processes that require vacuum. These pumps are designed to generate, improve and maintain vacuum. Learn about the different types of industrial vacuum technology. You can start by reading about the most common types of industrial vacuum pumps. These pumps can be used in a variety of industrial processes from cleaning to manufacturing.
Regardless of the technology used to manufacture these pumps, the basic principles behind their operation are the same. The speed and mass flow of the pump will determine its capacity and suitability. A faster flow rate will minimize the time it takes for the machine to empty. Another important factor to consider is the type of vacuum you need.
A liquid ring vacuum pump is an industrial pump that uses a ring of liquid to form a seal. This type of pump is best suited for applications with high vapor loads and high liquid carry-over. Liquid ring vacuum pumps can be divided into two categories: liquid ring vacuum pumps and scroll vacuum pumps.
Industrial vacuum pumps work by removing gas molecules from a chamber. The partial vacuum created allows material to flow through the void. As more molecules are removed, the pressure in the chamber decreases, releasing energy that can be used for a variety of different purposes.
The most common use of industrial vacuum pumps is for electric lights. In these lamps, a vacuum pump removes the gas, causing the bulb to light up. Energy from the vacuum is also used in aircraft to power instruments. In addition to powering industrial vacuum cleaners, they are used in a variety of other environments.
High-performance industrial vacuum systems require specific materials that can withstand extreme pressure. This means that the materials used in these systems need to be properly checked. They must also be free of organic debris and other contaminants before they can be safely placed in the chamber.

Types of vacuum pumps

There are various types of vacuum pumps. Which one to choose should depend on the purpose of the pump and the degree of vacuum that must be achieved. It is mainly divided into three categories: rough vacuum or low vacuum, high vacuum and ultra-high vacuum. They all have varying degrees of scarcity. The higher the pressure, the fewer molecules per cubic centimeter. This in turn improves vacuum quality.
The vacuum pump is critical to the operation of the vacuum system. These devices are divided into three main categories according to their working pressure range. These pumps have different characteristics and technologies that make them ideal for specific applications. The choice of vacuum pump required for a particular application depends on how much vacuum you need, and how much power you are willing to spend.
Vacuum pumps are used in a variety of industrial and scientific processes. Their main function is to remove gas molecules from the sealed volume, leaving a partial vacuum. There are many different types of vacuum pumps, including rotary piston, liquid ring and scroll vacuum pumps. In addition, turbomolecular pumps are used.
Dry vacuum pumps are more expensive than wet vacuum pumps. Wet vacuum pumps use oil as their lubricating fluid. Different types of oils are used depending on the application. Some wet pumps have additional features, including contaminant filtration. However, wet systems have one major disadvantage: the contact between oil and fluid. To avoid this, oil separators are usually used.
There are several different types of vacuum pumps. The basic type is the positive displacement pump. It operates by expanding the chamber and removing gas molecules. The intake valve draws fluid into the chamber, while the exhaust valve opens when the chamber is at maximum expansion. This cycle repeats several times per second. Positive displacement pumps are often used in multistage vacuum systems.
Vacuum Pump

Maintenance of vacuum pump

Regular maintenance is very important to ensure the long-term effective use of the vacuum pump. One way to ensure proper pump performance is to change the oil regularly. Pump oil may be contaminated by vapor condensation. To avoid this problem, close the inlet valve for 20 to 30 minutes before applying vacuum. It is also important to install an inlet cold trap to protect the pump from corrosive vapors.
Another way to prolong the life of your vacuum pump is to periodically remove any solvent in it. This step reduces internal corrosion and prevents premature pump failure. During maintenance, be sure to disconnect the power supply to the vacuum pump. After cleaning, store it in a dry and safe place. The pump should also be disposed of in accordance with local regulations.
Vacuum pumps may require frequent oil changes, especially when used in wet chemistry. The standard rule is to change the oil after 3,000 hours of use, but some pumps require more frequent oil changes. It is also important to clean the oil regularly, as dirty or discolored oil can affect the performance of the pump.
Vacuum pumps are often equipped with on-site glass to allow the user to visually check the oil level. Clean oil will appear transparent, while dirty oil will appear darker. Frequent oil changes are essential, as oil changes can help spot various potential problems. Changes in vacuum pump performance or strange noises are also good indicators of a problem.
After an oil change, the vacuum pump should be cleaned thoroughly with a soft cloth and mild degreaser. Oil changes should take less than ten minutes, and they will extend the life of your equipment. Additionally, the outside of the pump should be wiped with a cloth or rag.
The pump must be properly vented to avoid internal corrosion. If possible, place the pump away from hot equipment or rooms. Overheating can reduce the viscosity of the oil and cause premature pump failure. In addition, it can lead to overwork of other expensive scientific equipment. Heat can also cause cracked rubber parts and oil leaks.
Vacuum Pump

Signs of damage to the vacuum pump

A bad vacuum pump can cause a variety of automotive problems, including poor fuel economy, difficult braking, undercarriage oil leaks, and faulty air conditioning. If any of these problems occur, call a mechanic to check your vehicle’s vacuum pump. You can also check the air conditioner and brake pedal to see if they are working properly.
A loud noise from the pump can also be a symptom of a malfunction. These noises are often caused by the aging and accumulated wear of specific components. If this is the case, the diaphragm, valve plate or seals may need to be replaced. However, if the noise is coming from bearings or other areas, more extensive repairs may be required. Additionally, dust and other contaminants can enter the pump chamber, which can degrade pump performance.
If the vacuum pump won’t start, it could be a blown fuse or a power or voltage problem. Other common causes are flow restrictions or improper installation at the entrance. Also, the vacuum pump may be damaged or the capacitors may be of poor quality. It’s not always easy to tell if a vacuum pump is leaking oil, but a greasy transmission can indicate a vacuum pump failure.
A leaking vacuum pump can also hiss when the car’s engine is running. If you hear it, check the hoses and connections to make sure there are no leaks. A vacuum leak may indicate a faulty vacuum pump, so you need to replace it as soon as possible.
Checking end pressure is easy, but a pressure gauge can also serve as a sign. You can also check for pump vibration by running a short procedure. Excessive vibration can be subtle, but it can greatly affect your process. If you notice excessive pump vibration, you should contact a professional immediately.
Poor pump performance can cause many problems for your company. A bad vacuum pump not only wastes material, it also damages your tools and reputation.

China high quality Anti Corrosive Diaphragm Vacuum Pump for Lab Rotary Evaporator   vacuum pump	China high quality Anti Corrosive Diaphragm Vacuum Pump for Lab Rotary Evaporator   vacuum pump
editor by CX 2023-06-12