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The knife gate valve has a shearing function, which can scrape off the adhesive medium on the sealing surface and automatically remove debris. The stainless steel gate valve can prevent sealing leakage caused by corrosion. The knife gate valve is suitable for coal, slag discharge, urban sewage treatment, food, paper, medicine, petroleum, chemical and other oil, water, steam pipeline...
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The blow-out proof stem is one of basic design features of ball valve. Ball valve stem is inserted from the valve body inside with integral T-type shoulder to provide blow-out proof effectively. It is internally inserted as a function of backseat to assure stem sealing safety. To describe it in details, the stem is sealed by o-rings & packing rings, and held in position by the stem housing whi...
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These three materials of stainless steel 304, 304H and 304L are often used in valve industry. Among three, 304 is the most common one, like SS304 ball valve, SS304 gate valve, SS304 globe valve, SS304 check valve we often see. In fact, according to the content of chromium and nickel, they all belong to stainless steel 304, since they all contains 18% chromium (Cr) and 8% nickel (Ni). The ma...
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There are many ways to classify plug valves. In this article, we will introduce four main type of plug valves. 1. Lubricated Plug Valve A lubricated plug valve functions with the help of a lubricant (a base oil and viscosity improver) which is injected between the plug and body seat facing to reduce the frictions between them. The lubricated plug valve must be resealed after a few cycles. Due to i...
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An axial flow silent check valve’s disc is held in place by a spring. This upgraded structure design brings about many advantages. First, as its name indicates, the streamlined axial flow path through full-port expanded body prevent turbulence, erosion and vibration, which eliminate the process downtime and maintenance cost. Second, the full port passage and high-pressure recovery of the venturi-s...
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People often have a confusion between a knife gate valve and slide gate valve. In brief, knife gate valve uses a blade to cut through thick liquids or gas; while a slide gate valve utilizes a slide plate to shut off flow of dry bulk material. In this article, we will discuss their differences in details. Knife Gate Valve Knife gate valves were originally designed for pulp and paper industry. ...
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