What is hydraulic press? Actually, it is a kind of machinery that is based on liquid as the working medium and Pascal as the working principle to transfer energy so as to realize different workmanships. Generally speaking, it is made up of three main parts, which are main engine, dynamical system and hydraulic control system. There are many different types of hydraulic pressing machine , such as oil press and hydraulic press according to liquid's pressure, die forging press and open die forging press and so on. Maybe, you are still curious about what the so-called hydraulic press is used for. It is widely used to forge and press, rectify, pack and clamp. Besides, it also asks for some basic requirements for working medium. Firstly, it should have certain liquidity and low compressibility. Then, the medium also needs to have the function of anti-corrosion and better lubricating property. At the same time, its performance should be stable and can work for a long time without metamorphism and it also should be easy to seal. Driving system is another important aspect that should be introduced. As the whole, there are two main types of driving systems, which are pump driving system and pump-accumulator driving system. The former one uses the high-pressure hydraulic fluid that is supplied by pump and the flat valve is used to change the direction of the feed flow, while relief valve is used to adjust the limited pressure of system. Such a kind of driving system has the advantages of less system links and simple structure as well as low power consumption, which is often chosen by small and medium sizeforging hydraulic press. When it comes to the pump-accumulator driving system, it has one or a set of accumulators. Once there is superfluous high-pressure operating fluid, the accumulator will store it, while the accumulator will replenish if the supply is insufficient. Compared with the former one, there are many more links and the inner structure is comparatively more complicated. In addition, I also would like to involve some knowledge about the daily maintenance. In the first place, it had better dead-load operate for five minutes so as to pave the way for proper functioning. The new equipment needs to be filtrated thoroughly, especially the fuel tank. Meanwhile, the oil filter point is forbidden to be opened as the system emits heat during the using process. Most important, it mustn't be used in the open air and should have the rain-proof measures. 

A valve, in the basic sense, is a device used to start the movement of any kind of substances, whether gases, liquefied solids to any types of liquids. This apparatus controls the movement of the above-mentioned elements by opening, slightly blocking or completely closing various passageways. This type of device is useful in different applications, which include home use, military, business, transportation and the industrial setting. Valves are utilized in two different means; that is either by using pressure when used in the steam engine's safety control, or it can work within a regulated manner, like when valves have a chief role in the cycle control of a machine's engine such as when it is being run by a camshaft.

There are many different types of valves that are used in various ways. The butterfly valve is a commonly used valve. This valve is especially made for use in broad pipes. It is a disk revolving on a perpendicular axis inside the pipe and also functions as a damper or a control valve. This valve is an apparatus that regulates movement especially used in controlling a particular liquid that would run through a specific part of the pipe.

A valve such as this operates the same as a ball valve . This valve contains a flat round plate that is placed in the middle of the pipe, as well as the plate has a bar inside that is joined to a switch in the outer valve portion. This type of valve functions by revolving the handle as well as the plate in similar position or vertical to the movement. Unlike the ball valve type, the butterfly valve is constantly present in the movement; thus there is always a moderate drop in the pressure in the movement regardless of the valve's position.

There are three kinds of this valve. There is a valve that is high in performance, which is reliable in functioning under higher pressure that can withstand as high as 725 PSI and temperature applications. Next is the resilient valve, it has an elastic rubber seat and could work up to the pressure of 232 PSI. Lastly, the tricentric valve that is commonly adorned with a seating made of metal and it can function up to the pressure of 1450 PSI.

Likewise, there are other types of these valves that are available today, and that would be the lug style and the wafer style. The most popular would be thewafer type butterfly valve. This type would be under the plastic valve. In contrast, lug designed valves contain in them inserts made of metal, which are situated in the valve's bolt holes. The inserts are then eased into each end and through this method they would be permitted in a certain system using only dual bolts and without nuts.

Butterfly valves are definitely useful. These seal the pipes, protecting them against impairment as well as being an energy saver. An instance would be on cold months, these lock in heat allowing liquid in the pipes to flow freely. These could also regulate the pressure level inside tubes and pipes. These also endure high levels of oil and corrosive properties of salt, a factor that makes these valuable aboard ships.

Hydraulic press machine is one kind of device used hydraulic oil to deliver pressure, and hydraulic oil delivers pressure in the sealed container, which is in accordance with Pascal law. Moreover, the delivery system of hydraulic press consists of dynamic mechanism, control mechanism, implementing mechanism, supporting mechanism as well as operating media. Dynamic mechanism is generally used volumetric oil pump, so in order to fulfill the speed requirement of implementing mechanism, operators would select one or several oil pumps. In the cases of different oil pressures, operators would choose different components, for instance, if oil pressure is smaller than 2.5MP, they would choose wheel pump, if oil pressure is smaller than 6.3MP, they would select vane pump, and if oil pressure is at high-pressure level, they would thus choose piston pump. Generally speaking, hydraulic press refers to hydraulic pump and hydraulic motor, both of them are the energy changing devices in hydraulic system. The different point is that hydraulic pump would change mechanical energy in driven motor into pressure energy of oil, so we can regard hydraulic pump as the dynamic device in hydraulic system, while hydraulic motor changes pressure energy into mechanical energy, so it is the implementing device in hydraulic system. In addition, the operating principle of hydraulic press is simple. Under the control of electrical installation, dynamic mechanism would realize the energy transformation, adjustment and delivery with the help of pump, oil cylinder and varied hydraulic valves, so that various processing cycles can be properly done. As for the classification of hydraulic press, it can be divided into different types in terms of different conditions, for instance, based on the delivered pressure, it has oil hydraulic press and water hydraulic press and single action press. As the total pressure produced by water hydraulic press is relatively large, it is often used to do the forging and stamping. While forging water hydraulic press can be further divided into mold-forging typed as well as free-forging typed, that is to say, mold-forging water hydraulic press is used mold, but free-forging water hydraulic press doesn't use mold. Furthermore, according to the structural forms, it is classified into four-pole typed, C-shaped typed, horizontal typed as well as vertical typed hydraulic press and metal stamping presses. What's more, the repair of hydraulic press is of great importance. It is better to use pressure of hydraulic cylinder to dismantle tight-fit components, for if operators use stick or hammer to dismantle those parts, which will waste their much energy, and such doing is low efficient and unsafe, and it is easy to break other parts. While using pressure of hydraulic cylinder will not break components, and it won't waste energy, more importantly, it is safe and reliable, and it has high installation accuracy.