stainless steel valve how to repair damaged stainless steel valve repair is mainly on the valve plate and valve seat sealing surface grinding. Must be used when grinding, sand ( Abrasives) 。 Jules verne sand by alumina powder ( AlzOs) , synthetic corundum powder, silicon carbide, 原文如此) , boron carbide ( B。 C) Iron, lead powder ( FezO or Fe0. FezOg) 、( CrzO; ) , chrome oxide powder, glass powder, diamond powder made from or other material. The most commonly used is silicon carbide. Jules verne sand often if divided into thousands of number according to the particle size, so that when grinding, with coarse grinding, gradually replaced by thin number again, in order to improve the grinding efficiency and ensure grinding accuracy. Jules verne sand Numbers in table 7 - 1 column. Such as the sealing surface roughness more than 0. 5 mm, with grinding wheel to grind first is required or with lathe flat car, makes the roughness lower than 0. 05 mm again after grinding. For cast iron, bronze, brass Industrial Valves adopts silicon carbide abrasives. For carbon steel, alloy steel and stainless steel valve parts adopt corundum powder or artificial corundum powder. For hard alloy steel valves should be used in grinding of silicon carbide and boron carbide abrasives.

grinding stone can use the grindstone or made of cast iron, mild steel, copper or hardwood platform. Stainless steel usually hanging valve plate and valve seat grinding on grinding platform respectively. Globe valve, safety valve and lift check valve can separate grinding, can also be Industrial Valves disc and seat for grinding. Plug valves are used only cock and fujian Industrial Valves body of grinding with each other. Grinding marry according to the above introduction, according to material abrasive, abrasive generally prepared with oil for a ready-made paste, besmear again after to grinding surface grinding. Also can use different lubricant blending, sand as abrasives grinding, general grinding cast iron piece using kerosene or gasoline as the agent, grinding mild steel with oil, grinding copper used engine oil, alcohol or sodium carbonate solution.

FIG. 7 1 for globe valve ( Globe valve) The grinding method. The seat of the grinding as shown in figure ( a) Shows, insert the guide sleeve Jane seat, makes the guide sleeve of cast iron grinding sleeve and the valve seat grinding with each other. disc grinding as shown in figure ( b) , as is shown in the guide sleeve in the outside, trapping valve disc, grinding set), and valve disc grinding each other. When grinding, as mentioned above, should choose the proper abrasives. Gate valve grinding as shown in figure 7 2. In the figure, a) For valve seat grinding methods, when grinding, grinding disc for valve seat sealing surface, and abrasives, grinding is reverse rotation. The grinding disc is as shown in figure ( b) As shown in the gate, in grinding platform, for grinding. When grinding with abrasive, and to add lubricant, keep the stainless steel valves in a certain degree of wet grinding. Must not dry grinding, the friction heat production, make research strength decreases, grinding to quickly, it will reduce the accuracy.

ductile iron gate valve are all following the most compatible manufacturing regulations.
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