Items quality request and use smooth agent at low temperature

l) This is two kinds of specifications for different levels of smooth agent, in the GB 7631. 2 a in 87 are of smooth agent used under wide temperature range. The second type oil has low pour point, excellent abrasion resistance, low temperature activity and low temperature pumping. HV, HS smooth agent oil content according to the foundation for mineral oil and synthetic oil type two kinds, according to 40. Kinematic viscosity, C H Ⅴ oil content is 15, 22, 32, 46, 68, 100, six grades, HS oil content is 15, 32, 32 and 46 four grades. 2) Use ( l) H Ⅴ smooth agent at low temperature is mainly used for cold and harsh or wide temperature range and working conditions of engineering machinery, the introduction of equipment and vehicles of middle or high pressure hydraulic system. Such as nc machine tools, cable pit pump. And ship crane, excavate machine, large crane hydraulic system. Using the temperature in a more than 30 'C. ( 2) The HS smooth agent at low temperature is mainly used in cold region above all sorts of equipment. The use of temperature is 30. The following C. 3) The quality requests, l) Suitable viscosity. ( 2) Good extreme pressure antiwear performance. ( 3) Excellent low temperature performance, low pour point, can guarantee the engineering machinery or equipment in the cold or cold zones environment is easy to start and run properly. ( 4) Good viscosity-temperature properties, viscosity index above 130, guarantee the hydraulic equipment under the condition of large variations in temperature to get good smooth, cooling and sealing. ( 5) Good demulsibility and antirust performance. ( 6) Good oxidation stability, hydrolytic stability and thermal stability of performance. 4) Pay attention to matters, l) Smooth agent is a kind of low temperature with anti-wear and smooth with upper and lower temperature performance of senior agent, should pay attention to reasonable use. ( 2) Low temperature smooth agent cannot be used for parts of hydraulic equipment with silver. ( 3) HV oil and HS oil because root oil composition is different, so can not be used conventional eight so as not to affect performance. Pay attention to other matters with HM smooth agent.