A common problem of rotary-vane vacuum pump are used

high cost performance, technical reliability, long service life is rotary-vane vacuum pump is widely used for many years. Rotary-vane vacuum pump oil lubrication and sealing structure, so the impact rotary vane vacuum pump reliability and service life of pump is the most important factors in steam and chemical erosion and aging of lubricant.

1。 Steam extraction

most of the rotary-vane vacuum pump manufacturers will explain in detail the equipment in the steam tolerance or grams per hour capacity of the steam. The information refers to water vapor. As the pneumatic valve opens and vacuum pump are at the working temperature, if the inlet pressure is lower than the given value, pumping water vapor condensation. In the process of drying, the size of the pump is not determined by the pump speed according to steam, but determined by the collection of water per unit time. Therefore, must use the vacuum side of the closed and open air pressure valves pre heat pump, about 15 to 30 minutes in order to achieve the best working temperature ( Oil) ( About 70 - 80℃) 。 Only under the correct operating temperature, steam to by opening the pneumatic valve pump out. High vacuum valve delay open can be easily integrated into the control system.

pump pressure process is completed, suggested that open the pneumatic valve, vacuum pump to continue running about 15 minutes, so that the rest of the steam in the pump body can through the exhaust system. The regeneration process of working fluid to prevent stagnation corrosion and possible pump failure.

the necessary pump before and after pump operation can be easily integrated into the controller through the timing tool. If the system requires less than 1 to 200 mpa limit pressure of air pressure, you need two stage rotary vane vacuum pump. It is worth noting that the two stage rotary vane vacuum pump steam tolerance and capacity will be lower than that of single pump.

2。 Working fluid

when using rotary vane vacuum pump, the working fluid ( The vacuum pump oil) Mainly in charge of three important functions: seal, valve and bearing lubrication, conduction aluminum shell of compression and friction heat on cooling pump body.

with gearing and lubricant oil level is of great importance in all oil seal rotating vane pump and vacuum pump preventive maintenance and daily maintenance. If the oil level drops too low, would no longer be lubrication pump system. Due to lack of lubrication, the operation of the pump system will be blocked, eventually resulting in failure of pump. Low oil level also get in the way of compression heat dissipate. overheating will cause working fluid rapid aging. Lack of lubrication and the formation of oil carbon eventually lead to water pump failure. Therefore, must ensure that pump oil level cannot under the intermediate position of the viewer.

need to periodically check the color of the working fluid, viscosity, and pollutants. If the working liquid moisture content more than 5%, will present milky white. When the gas shock valve closed, open or exceed the maximum steam capacity vacuum process, and working fluid is still cold, this occurs. With the loss of working fluid, liquid dimming process. If the color of the working liquid to 6 kinds of color, From left) That must be replaced immediately. The change of working liquid color range suitable for P3 pump oil. In order to prevent this kind of phenomenon, it is suggested that once every 12 months to replace vacuum pump oil.

if the user is not sure whether the use of working fluid can resist process gas, the manufacturer shall be consulted, to determine the correct working fluid and pump design.

when the concentration of the extraction of oxygen is greater than the content of oxygen in the air, due to the oxidation of working fluid and aging, mineral oil can't use. In this case, you must use the BAM certification of special oil is suitable for oxygen. At this point, please note that under the working temperature of pump, the working fluid used by very low vapor pressure, thus the limit pressure can be in total ( The vapor pressure of oil) Under the limit of the implementation.

3。 Mark the size of the intake pipe and exhaust pipe

entry and exit of nominal diameter by the manufacturer according to the biggest pump speed to design vacuum pump. Intake pipe and vacuum pump, therefore, it is very important to whether the nominal diameter of consistent, otherwise the speed of the pump will be reduced due to loss of conductivity and serious, especially in the range of molecular flow. Exhaust pipe should be consistent with the nominal diameter of the pump. Small

because of rotary-vane vacuum pump perform compression operations, will release a certain amount of heat, so must provide adequate ventilation. If necessary, it is better to install another fan, in order to ensure the normal heat dissipation. This is especially suitable for installation on the device or sound-absorbing cover of the pump. If you can't meet the requirements of ventilation and equipment might overheat and damage the pump.

many of these instructions can also be applied to other types of vacuum pump, roots pump, diaphragm pump and dry pump.

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