DN75 内外环金属缠绕垫厂家 目前应用广泛的一种密封垫片，为半金属密封垫片中回弹性*的垫片，由V形或W形薄钢带与各种填充料如：石墨，四氟等交替缠绕而成。通过改变垫片的材料组合，可解决各种介质对垫片的化学腐蚀问题。为加强主体和准确定位采用金属内加强环和外定位环形式，利用内外环来控制其大压紧度起到加强的作用并避免基本体的散圈，由于外环的存在使得垫片安装起来更加方便。
DN75 内外环金属缠绕垫厂家
下表是缠绕垫片直径公差（即用于法兰的名义管道直径）：
DIN (mm)ANSI B16.5
BS1560 (mm)
Mss sp-44API 605公差内环内径
垫片内径<=600<=24">=26" and <=34"±0.5>600 and <=800>24" and <=34">=36" and <=60"±0.9>800 and <=1600>34" and <=60" ±1.3>1600>60" ±1.6垫片外径<=600<=24"<=24"±0.9>600 and <=16000>24" and <=60">24" and <=60"±1.81600>60" ±2.2外环外径 >=1/2" and <=60"±0.9<=600<=24" 0-1.0>600 and <=1000>24" and <=34" 0-1.8>1000 and <=1600">34" and <=60 0-2.2