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                        您当前位置: 首页> 商业资讯> 泵阀资讯> 国内阀门材料常用技术标准 缠绕式垫片密封元件和内环、定位环的内外径尺寸偏差

                        国内阀门材料常用技术标准 缠绕式垫片密封元件和内环、定位环的内外径尺寸偏差

                        时间:2016-03-28 11:28:12 来源:中国泵阀网 点击量:10229

                        国内阀门材料常用技术标准 缠绕式垫片密封元件和内环、定位环的内外径尺寸偏差

                        公称尺寸

                        DN

                        密封元件 内环、定位环
                        D2a D3a D1 D4
                        ≤200 ±0.5 ±0.8 +0.5 -0.8
                        250~600 ±0.8 ±1.3 +0.8 -1.3
                        650~1200 ±1.5 ±2.0 +1.5 -2.0
                        1300~3000 ±2.0 ±2.5 +2.0 -2.5
                            a 基本型和带内环型垫片D3不应为正偏差,基本型垫片D2不应为负偏差。

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