First, the role of vacuum pump oil :
1. Sealing: Prevent the atmosphere from entering the exhaust valve and have a gap seal between the moving parts (rotor and stator, rotary vane and rotor slot, etc.).
2 , lubrication: lubrication between the moving parts, reducing wear.
3. Cooling: The oil circulates between the pump and the fuel tank to dissipate heat and cool.
4. Carrying: Wrap dust or other particles generated by abrasion in the oil to reduce wear and tear.
5. Protection: Form a protective oil film to prevent water and chemical vapor condensation from corroding the components inside the pump.
Second, the performance requirements of vacuum pump oil :
1. At high temperature, the saturated vapor pressure should be low and the volatile components should be less.
2 , the lowest water content and water absorption.
3 , to have a certain viscosity, and with the temperature change is small (viscosity temperature rise curve is smooth).
4 , good lubrication performance, good resistance to cracking under mechanical stress.
5 , anti-corrosion, anti-oxidation, chemical properties are stable.
For the vacuum pump manufacturing plant, the selection of high quality oil, can improve the overall performance of the pump, bring benefits to the majority of users, resulting in a good social benefits. For the user , if the effect of the use of the factory oil is not very satisfactory , it can also be selected according to the specific situation. For example : 1 If it is cold in the day , it is difficult to start . You can choose a pump oil with a lower viscosity grade. 2 If the pump is working at a higher pump temperature for a long time , for example , if the pump has a heat source in the summer and the environment is poorly ventilated , the suction gas is heated or the inlet pressure is high, etc. , a high-quality oil of a viscosity grade may be selected or applicable. For high temperature, high load pump oil , such as HFV-A series oil. 3 If the pump temperature is high , and the pump pressure is not high , such as the double pump maximum pressure ≤ 5 Pa, the qualified oil with a viscosity of 100 or 150 , or the same or slightly higher viscosity mechanical oil, can be selected . Motor oil , mechanical oil prices are lower. ④ If the oil change period is short or very short, can meet the performance requirements, with a seat by higher viscosity or viscosity-defective oil or machine oil, compressor oil, in order to reduce the cost of oil change. The specific choice is determined by the user.
Industrial sectional doors are the most durable and longest lasting doors to ensure circulation at the areas of the factory entrance and exit of goods, loading and unloading areas.
The body of sectional door is forming by 40 mm sandwich panels. These panels provides sound and heat insulation due to the intense doped polyurethane insulation was injected between galvanized steel sheet. (50 kg/m3).
Industrial sectional door systems provide space-saving with opening parallel to the ceiling.Any opening can be used clearly . and produces in accordance with the transition range and the height in the factory buildings or warehouses.
Doors is working sliding by be the most appropriate the gap between the top level of the gate with a ceiling height within the side rasils. The door can be mounted in different ways according to the gap distance (standard, low, highlift and vertical track systems).
Industrial sectional doors can easily be opened automaticly by 230-380 V-AC/50 Hz electric motor or manualy thanks to torsion spring system that balances the weight of the door.The galvanized springs are made to be durable of 25.000 door cycles.Motor with emergency chain All the drive systems have a mechanical back-up system fitted to the reduction gearbox of the electric motor, so that the sectional door can be opened if the power fails. The reduction gearbox can then be powered using the chain.
Industrial Sectional Door,Industrial Overhead Sectional Door,Industrial Warehouse Sectional Door,Industrial Garage Interior Sectional Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfrollershutterdoor.com