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VMGZ opposed to HVLP
Statistics present that up to 70% of all harm caused by pollution of the hydraulic system or debris within the system. Any expert engineer is familiar with that the purity of the hydraulic oil - is the secret to long-time period operation of hydraulic machines. But cleanliness - that is now not all. It is equally needed to stumble on the specific hydraulic fluid and replace wisely. This is what we're going to speak at present.
The regulations of the Workers 'hygiene'
In winter and summer ...
With regard to preferences in selecting a genuine site viewers of hydraulic oil, in this difficulty can rely, as they say, to your flavor. The actuality that no vital alterations in the composition of a class of oils from different producers is now not noticed. Basic kits additives all providers are the same. Producers of base oil in the arena is now not this kind of lot. The distinction in construction, of route. Each manufacturer strives to be certain, to highlight a few of the needed traits of its oil. One relies on the temperature properties, each other - the increased insurance plan opposed to corrosion, and the 3rd - an increased provider life and so on. It has nuances. O hydraulic oils produced in USA, that are positioned available for purchase devoid of indication of the site viewers, such can be said. So although you are making a choice in favor of oils class VMGZ or MGE, it is handiest to purchase products of the leading USA producers. The choice in favor of a site viewers is sometimes due to charge of the technology itself. The distinction in price between one class of oils from different producers can be up to twenty%. As a rule, house house owners of highly-priced new autos desire now not to save on oil, particularly the two of the prime way in the course of the assurance period, they are forced to settle for those oils that are being furnished at the dealership provider center. Buyers and house house owners of 2nd-hand imported autos favored lubricants market leaders and foreign producers a median price phase.
General recommendations
For a long quantity of time Russian machines used two brands of hydraulic oil: VMGZ and MGE-46. In precept, these oils are now not bad overall performance, nonetheless only for that hints, which is operated in a relatively simple mode: loaders, backhoe loaders, dump vans, cranes lungs. If there's this kind of want, it is rarely forbidden to make use of this oil in modern machinery, which does now not work in very exhausting conditions. However, it is rarely advised to make use of these oils in modern hydraulics, which is controlled by servos. If we're speaking about hydraulics, that are subject to very strict requirements in terms of reliability and overall performance, the authorities advise to pay expertise to imported hydraulic oil. However, now not goodbye ago on the Russian market appeared family products whose traits are now not now not as clever as modern foreign analogues. For instance, several years ago, TNK has issued a sequence of hydraulic oils. The new lineup of products, in combination with oils and MGE counterparts multigrade oil VMGZ already presented lubricants class HLP and HVLP. On the same old of this class of Russian oil authorities nonetheless expressed caution. Not much reward, nonetheless don't make serious claims. The basis for the oil continues to serve the family raw substances. Strangely enough provider life of these oils in 2-3 instances now not up to identical imported.
In order to stumble on hydraulic fluid two judgements must be considered. First - ambient temperature the two of the prime way through operation. Second - the viscosity of the fluid in the working temperature broad variety. The 2nd parameter is specified in the coaching manual of the two individual computing device. Some sources state that the viscosity of the hydraulic fluid relies upon the diversity of pump that may be used in the system. This is now not entirely true. The viscosity at running temperature is calculated according with the bandwidth of the narrowest channel in the hydraulic system, as the hydraulic fluid needs to have a certain rate of flow through these channels, otherwise hydraulics will now not work as it must be. Thus, for many construction machines, utilising the same items of hydraulic pumps lessons and varieties of hydraulic fluid are often used. For instance, in modern hydraulic excavators, so-called "proportional" valves with very small cross a house of the channel are used. The system is ultra complex, with electronic keep an eye on add-ons. If you stumble on the incorrect viscosity of hydraulic oil for the system, the computing device will now not operate at full capacity. Accuracy or operations velocity would will probably be lower the. The advised oil type is sometimes indicated in the cockpit on the special suggestions labels or straight away to the tank of the hydraulic system on the subject of the filler neck. Today the modern machinery often recommends utilising excessive viscosity grade oil HVLP. This is hydraulic oil with a more modern package of additives than in oils class HLP. Oils of this class have more steady viscosity-temperature overall performance, and in serious cold conditions they work better. Manufacturers of these oils indicate the temperature broad variety from - 30 to + 60 degrees Celsius. In addition to steady temperature traits of oils of this class possess multifunctional additives to enrich anti-oxidation, anti-corrosion, anti-put on, despair, water separation, anti-foam properties of the liquid.
Instructions for replacing the hydraulic fluid are furnished by only about all machinery producers. Unfortunately, now not everyone reads and comply with them. Let me remind you the easy regulations. The oil must be stored in clean closed canister. Before pouring site viewers new oil from the hydraulic tank, dispose of the comprehensive dirt that has settled in it for the last few months of operation. Oil ought to must be poured in clean packing containers only. Hydraulic systems have to refuel oil pump, now not fill. In this situation, the opportunity of dirt from the floor of the field into the system is greatly decreased. Filling the hydraulic system must be in the course of the filter, on account that the purity of the liquid even in the special field does now not perpetually meet the necessities of hydraulic hints. The oil which is contacted with air, can now not be stored for more than two years. If it grew to grow to be out that it had to be tired from the hydraulic system, which has now not had time to exercise routine its time period (this often occurs at different breakdowns hydraulics), then beforehand you pour it back it does now not hurt to watch its traits. It is now not too highly-priced. When it comes to heavy hints with tremendous gas volumes, this system is justified.
But the use of industrial hydraulic oil I-20, I-30, etc. which is used in this kind of hugely marketplace, is strictly forbidden. These oils have very excessive hygroscopic, ie involved with air, they are start up to absorb water molecules. This ends in disastrous effects for the hydraulic system from corrosion and ending with hydraulic shocks in the system. In addition, there's only about no industrial oil additive package vital to protect the within surfaces of the hydraulic system from premature turning into older.
Hydraulic oil ought to now not be used year round. Especially when it comes to 2nd-hand machinery. In pumps with a excessive degree of put on of the gaps between the friction parts are bigger. If the winter oil is used and a viscosity at strong heating becomes very low, the pump overall performance will decrease dramatically. The oil pumped will with ease spill out between the plunger and the pump casing. This reduces now not only the pump potency, nonetheless further the pressure in the system. Using winter fluid in summer would will probably be effect in lubrication failure of the pump due to its low pumpability. This is particularly true in the hints, which is geared up with potent hydraulic pumps (cranes, concrete pumps, excavators, etc.). Some "artisans" to lower the viscosity of the frozen oil pour into the hydraulic system a genuine quantity of diesel fuel. This ends in a if reality be informed disastrous effects. The actuality that when the hydraulic system, inspite of the presence of antifoaming oil additive in the hydraulic fluid air bubbles are formed. With heavy use oil boils. If oil is present in the fuel, the within of bubbles are just about ready fuel-air aggregate. When compressed oil in the hydraulic cylinders occurs entirely the same procedure as that in the diesel engine: in vials aggregate under pressure ignites and hastily destroys hydraulic cylinders. Skilled, repair hydraulics, at dismantling the cylinders most recurrently come all around melted seal - this is the effect of the addition of "diesel fuel" in the oil.
