I want to introduct something about Butterfly Valve.
Detailed Product Description 1, DN : 50mm—-500mm 2, PN : 16MPa , 25MPa , 40MPa , 64MPa , 150Lbs, 300Lbs 3, Structure length : ANSI B16.10 4, Link size : Flanged , Butt welding , Socket welding ,Threaded 5, Main body material : Stainless steel , Carbon steel 6, Sealing surface and Inside valve components material : According to customer request manufacture 7, Gasket, Fillers, Fasteners : According to customer request manufacture 8, Structure : two-piece body , floating ball , full or reduced bore , blowout proof stem , fire-safe and anti-static 9, Transmission mode and method of operation : Manually , Electric , Air operated , Hydraulic , Turbine 10, Technical Features : fire-safe and anti-static 11, Design standard and approv
Diaphragm valves (or membrane valves) consists of a valve body with two or more ports, a diaphragm, and a “saddle” or seat upon which the diaphragm closes the valve. The valve is constructed from either plastic or steel.
Originally, the diaphragm valve was developed for use in non-hygienic applications. Later on the design was adapted for use in the bio-pharmaceutical industry by using compliant materials that can withstand sanitizing and sterilizing methods.
There are two main categories of diaphragm valves: one type seals over a “weir” (saddle) and the other (sometimes called a “straight-way” valve) seals over a seat. The main difference is that a saddle-type valve has its two ports in line with each other on the opposite sides of the valve, whereas the seat-type has the in/out ports located at a 90 degree angle from one another. The saddle type is the most common in process applications and the seat-type is more commonly used as a tank bottom valve but exists also as a process valve. While diaphragm valves usually come in two-port forms, they can also come with three ports and even more. When more than three ports are included, they generally require more than one diaphragm; however, special dual actuators can handle more ports with one membrane. (more…)