{"product_id":"valve-selection-and-specification-guide-9780442318703","title":"Valve Selection and Specification Guide","description":"\u003cp\u003eToday  people who specify or select valves spend over two-thirds of their time researching literature for information on valve sizing  availability  materials  and standards. This is nonproductive time. Unfortunately  most companies do not have the luxury of a team of experts with the necessary experience and education in all of the different fields that apply to valves. The next best alternative is to understand what valves are and all the things they can do. By definition  valves are devices that stop  start  mix  or change the direction and\/or magnitude of the fluid flow  pressure  or its tempera ture. As a specifier or selector you will have to determine whether the valve is going to be used for flow control  throttling  or for on-off service. Then you will have to determine the cycle life or frequency of their operation. You will discover that valves are classified into three categories: on-off valves  control or regulator valves  and fixed valves such as orifice plate  nozzle  duckbill  rupture disk  blind valve  etc. These valves represent approximately thirty different design configurations. It has been said that if cost and delivery were no problem  anyone of the seven basic valve styles could do the job of any other one. But cost and delivery are very important factors in the real world. So you have to be able to distinguish among these seven styles: ball  butterfly  gate  globe  pinch\/ diaphragm  plug  and poppet valves.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":67944816869429,"sku":"ByrdShop_0442318707","price":92.15,"currency_code":"USD","in_stock":true}],"url":"https:\/\/atxbooks.com\/products\/valve-selection-and-specification-guide-9780442318703","provider":"ATX Books","version":"1.0","type":"link"}