Selection and purchase of air compressor oil for air compressor oil scientifically

　　1. How is the air compressor oil classified?

　　Answer: air compressor oil is divided into two parts according to the structure of compressor, reciprocating air compressor oil and rotary air compressor oil, each of which has three grades of light, medium and heavy load.

　　Air compressor oil as base oil type can be divided into mineral oil, compressor oil and synthetic compressor oil two categories.

　　2. What are the kinds of reciprocating air compressor oil?

　　Answer: reciprocating air compressor oil is divided into light load L - DAA, L - DAB load and heavy-duty L DAC three, 32, 46 were Grade 100, 150, 68, five brands, including DAA, DAB is a mineral oil type, DAC is a type of synthetic oil.

　　3. What are the types of rotary air compressor oil?

　　Answer: rotary air compressor oil according to the light, medium and heavy load are divided into three types, i.e. light load L DAG, load L - DAH, L - DAJ heavy load, viscosity grade set 15 and 22, 32, 46, 68, 100 and six grades, including DAG, DAH is a mineral oil type, DAJ type synthesis.

　　4. What are the function and main performance of air compressor oil?

　　Answer: air compressor oil is mainly used for lubrication of compressor cylinder moving parts and exhaust valves, and plays the role of antirust, anticorrosion, seal and cooling. Because the air compressor has been in the environment of high pressure, high temperature and condensed water, the air compressor oil should have excellent high temperature oxidation stability, low carbon deposition tendency, proper viscosity and viscosity temperature performance, good oil and water separation, rust and corrosion resistance.

　　5. What are the main kinds of synthetic air compressor oil? Compared with mineral oil type has what advantage?

　　Answer: the main synthetic hydrocarbon base oil synthetic compressor oil (poly alpha olefin), organic ester (diester), polyalkylene glycol, fluorine silicone oil and phosphate five, compared with the mineral oil type has high stability, high temperature Yi Shengcheng coke, wide temperature range, low pour point, low volatility and the advantages of long life, but because the price is expensive, only for compressor harsh conditions cause compressor oil can not bear the.

　　6. Why must air compressor oil have good oxidation stability? What is the evaluation method?

　　Answer: because the air compressor oil in the cylinder continuously with high pressure hot air contact, extremely easy to cause oxidation, decomposition, and catalytic oxidation in metal debris, exacerbated the oil aging and generate a variety of organic acids, resin and asphaltene, reduce the mechanical efficiency, equipment wear and tear caused by the machine. Wen Shenggao, even the gas cylinder explosion accident. Therefore, the air compressor oil must have good oxidation stability. The evaluation method is GB/T12709 lubricating oil aging property measurement and GB/T12581 turbine oil oxidation stability test.

　　7. What is the main reason for the explosion of air compressors? How to prevent it?

　　Answer: anti oxidation stability bad air compressor oil, easy to produce oil sludge and coke deposition. The air compressor oil with poor thermal stability is easy to decompose to produce light hydrocarbon and carbon dust. The two causes the explosion of air compressor oil.

　　The main substances in the oil to produce coke is colloid, asphalt and polycyclic aromatic polymers can be removed through the depth of refining, so the air compressor oil using low viscosity, depth of refining, not narrow fractions containing heavy light oil is low carbon residue oil as base oil, and avoid ash additive. In order to improve the oxidation stability and stability of oil products.

　　8. How to choose the viscosity of the air compressor oil?

　　Answer: compressor oil viscosity choice mainly consider exhaust pressure, secondly balance pressure ratio and exhaust temperature.

　　Transmission mechanism

　　Cylinder part

　　Piston force viscosity grade

　　KN winter summer

　　Viscosity grade of exhaust pressure

　　MPa winter summer

　　Less than 3532, 4646, 68

　　>35 46, 6868

　　Less than 146, 6868, 100

　　68, 100100, 150 and 10

　　1040 100, 150150, 220

　　9. What is the suitable compression medium for air compressor oil?

　　Answer: air compressor oil for compressed air medium; all kinds of hydrocarbon gases (such as natural gas, liquefied petroleum gas, coke oven gas, ethylene, propylene, propane); inert gas (such as hydrogen, nitrogen, carbon dioxide, carbon monoxide and argon, neon, helium); active gas (such as chlorine, hydrogen chloride, nitric oxide sulfur dioxide, etc.).

　　10. What kinds of domestic air compressor oil are there at present? What is the specification standard?

　　Answer: at present, China has a reciprocating air compressor oil standard varieties of LDAA, LDAB two, Standard Specification for GB1269190, viscosity grade 46, divided into 32, 68, 100, 150 and five grades.

　　Rotary air compressor oil has been standardized with L DAG light load injection rotary air compressor oil, specifications for GB5904 86, 15, 22, grade 32, 46, 69, 100, six grades; L DAH (rotary screw air compressor oil) standard enterprise standard, set up 32, 46, 32A, 46A four grades, DAH oil is by hydrogenation oils into a new type of high quality screw air compressor oil, has excellent thermal oxidation stability and low coke formation tendency, in which 32A, 46A is a wear type.

　　11. What are the representative specifications of foreign air compressor oil?

　　Answer: the representative specifications of foreign air compressor oil are: DIN51506, Germany (GB12691, China)