Basic Hydraulic Systems

Basic Hydraulic Systems Every hydraulic system has a minimum number of basic components regardless of its design and function. The fundamental components of the hydraulic system include pump, reservoir, directional valve, check valve, pressure relieve valve, selector valve, actuator, and filter. An open center system has fluid flowing, with any pressure in the system when the actuating mechanisms are idle. The pump disperses the fluid from the reservoir through the selector valves and return to the reservoir. The open center system may engage a several subsystems, with a selector valve for every subsystem. The selector valve of the open center system is connected in series with each other. In this arrangement, the system pressure line will go through each selector valve. The fluid is allowed free passage through the selector valve and return to the reservoir until one of the selector valves is ready to operate a mechanism. When one of the selector valves is set to operate an actuating device, fluid is flowing from the pump through one of the working line to the actuator. When the selector valve is set in this position, the fluid flow to the reservoir is blocked. The system overcome the resistance by using the pressure build up in it and move the piston of the actuation cylinder, fluid from the opposite end of the actuator will returns to the selector valve and return to the reservoir. The operation of the system after actuation of the component will depends on the type of the selector valve that has been used. Many types of selector are used together with the open center system. One of the types is both manually engaged and manually disengaged. The valve is manually moved to an operating position. Then, the actuating mechanism reaches the end of the operating cycle, and the output of the pump continue until the pressure is relieves by the system relief valve. The relief valve dismount and allows the fl uid to return to the reservoir. The system pressure remains at the relief valve set pressure until the selector valve is returned manually to the neutral position. It reopens the open center flow and let the system pressure to drop to line resistance pressure.

MKTG 3000 Essay Example | Topics and Well Written Essays - 1000 words

MKTG 3000 - Essay Example The public who attracted towards this ad will take more time in analyzing the features of this advertisement. The theme of this ad is that the two pieces of Bounty chocolate available in the chocolate packet displayed in the picture are not mere chocolates, but â€Å"Two pieces of paradiseâ€Å" just like the two thighs of the female model represented in the advertisement. The ad tried to keep consistency in its theme as the model has wore only two pieces of dress and the entire picture consists consist of only two other objects; a coconut tree and a beach. The coconut tree moving in the wind and the beach at the backdrop are giving more pleasant feelings to the viewers of this advertisement. This advertisement ask the readers to enjoy the taste of the Bounty chocolate just like they are enjoying the thighs of the female model presented in the advertisement. The above advertisement clearly shows that how fierce is the competition in the food market. The advertisers are not taking any ethical means while preparing their advertisements. Their intention is only to catch the attention of the public and for that purpose they are ready to go up to any extent. I don’t think the above advertisement may succeed in increasing the sales of the Bounty chocolate beyond certain limits. Current consumers are more aware of the quality of the goods they are purchasing rather than the attractiveness of the advertisement. At the same time, because of the variety displayed, the above advertisement may catch the attention of the teenagers. The intention of the advertiser might be the same also. The intrusion of television and internet like medias decreased the demand of magazine and journal like print medias. People are spending less time for reading printed articles nowadays and therefore printed ads are not reaching the eyes of the public adequately. If the printed ads are not much good in catching the attention of

How precious metals relate to the economy Research Paper

How precious metals relate to the economy - Research Paper Example While gold remains the most popular investment vehicle for investors, silver, platinum, and palladium continue to hold strong interest. This research paper focuses on how these precious metals relate to the American economy and examines the price of the dollar in relation to these metals. This essay describes the history of the Western economy and banking structure, that was originally linked to gold through the gold standard. At a time in history all currency produced was held to a standard reserve of gold in the country’s central bank. However, recent decades have gradually witnessed a shift from this economic structure. Today precious metals operate in large degree like a currency, as they are subject to market inflations and deflations. There are many motivations for the purchase or investment in precious metals. In this context of understanding, this research paper reveales that precious metals largely function as a hedge for investors against fiat currency and volatile markets. In addition the nature of the historic relation between gold and currency is examined in terms of the gold standard. It’s noted that supporters argue going off the gold standards creates greater government volatility, while detractors argue that going off the gold standard creates the potential for a welfare state. Ultimately, it’s clear that both historically and in the contemporary environment precious metals and the economy are greatly intertwined.