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          NEWS

          • Stem nut material of choice

             

            Stem nuts are usually made of the following materials:

             

            Steel. Electric valve stem nut needs hardness and ammonia medium corrosion of copper, steel instead of copper. 35, 40 quality carbon steel and 1Cr13, 1Cr18Ni9, Cr17Ni2 and other stainless steel are often used to make stem nut without causing stem bite. In the selection should follow the valve stem nut hardness lower than the general rule of stem hardness, so as to avoid premature wear and bite.

             

            Plastics. Stem nuts are made of nylon 66 and nylon 1010, which offer corrosion resistance, low friction coefficient, good workability and low cost. But because its strength is lower than metal, it is only used for low pressure, small diameter valves.

             

            Copper alloy. Copper alloy does not rust, the friction coefficient is small, has certain strength and toughness, is the valve stem nut commonly used materials. 2CuZn38MnPb2 brass is commonly used for low pressure valves with nominal pressure less than or equal to 1.6MPa. ZCuA110Fe3 wuxi bronze is commonly used for valves with nominal pressure less than or equal to 6.4MPa. High pressure valves with nominal pressure greater than 6.4MPa are usually cast brass ZCuZn25A16Fe3Mn3.

             

            The above information is provided by laizhou jinsuole valve accessories co., LTD.

             
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