1、高温填料填料选用柔性石墨。
1. Flexible graphite is used for high temperature packing

其在空气中氧化温度为450℃,并在此温度下每24h后质量减轻1%。温度越高,质量减轻得越多,氧化现象越严重。柔性石墨填料zui高使用温度为650℃,且仅用于非氧化介质。考虑到填料在填料函内处于压紧密封状态,只有一部分与空气接触,有资料介绍处于这种状态的填料使用温度可达816℃。
Its oxidation in air temperature is 450 ℃, and at this temperature every 24 h after quality to reduce 1%. The higher the temperature, the lower the mass, the more severe the oxidation. Flexible graphite packing zui high temperature of 650 ℃, and only used for the oxidation medium. Considering the packing in a pressure tight seal state within the stuffing box, only part of it is exposed to air, packing with data is introduced in this state use temperature is 816 ℃.

2、电动高温蝶阀阀杆材料
2. Material of electric high-temperature butterfly valve stem

根据高温强度估算,奥氏体钢在704℃的高温工况下,强度降低6415%以上,如果采用加大阀杆直径提高其强度的方法,则超出阀门结构要求,因此奥氏体钢不适宜做阀杆材料。lnconelX-750在704℃的高温工况时,强度降低4113%,但强度值还很大（表1）。根据屈服强度,并考虑持久强度计算得到的阀杆直径,符合阀门结构要求,因此阀杆材料选用lnconelX-750。
According to estimate, the high temperature strength of austenitic steel at 704 ℃ high temperature conditions, strength decrease by more than 6415%, if adopt the method of increasing stem diameter increase its strength, is beyond the valve structure, therefore the austenitic steel is not suitable for stem material. LnconelX - 750 in the working condition of the high temperature of 704 ℃, 4113% lower strength, but strength value is large (table 1). The stem diameter calculated according to the yield strength and considering the endurance strength is in line with the requirements of valve structure, so the material of stem is lnconelx-750.

3、电动高温蝶阀阀体材料
3. Material of valve body of electric high-temperature butterfly valve

阀门设计执行标准为ASMEB16134。按该标准中的压力-温度表计算得到的阀门常温下的压力等级数,就是设计基准,并以此来计算zui小壁厚。在设计过程中,阀体材料也选ASMEB16134标准规定的材料,并且材料的适用温度高于阀门工况zui高温度。经过查阅了大量国内外类似工况的电动蝶阀阀门设备材料使用情况,结合对高温材料的使用经验,选择了性价比较高的304H作为阀体材料。此材料可减小蠕变对材料的影响。

The valve design standard is ASMEB16134. According to the pressure - temperature gauge in this standard, the number of pressure grades under normal temperature of the valve is the design benchmark, and from this calculation zui small wall thickness. In the design process, the valve body material is also selected as the material specified in ASMEB16134 standard, and the applicable temperature of the material is higher than that of zui under the valve condition. After consulting the use of a large number of electric butterfly valve equipment materials in similar working conditions at home and abroad, combined with the experience of using high-temperature materials, 304H with high cost performance was selected as the valve body material. This material can reduce the effect of creep on the material.