天气预报 > 其他 > 调节阀泄漏有几个等级
调节阀泄漏有几个等级
更新时间: 2020-09-18 00:00:00  

调节阀的泄露标根据国外ANSIB16点104FCI702制定,相应国内标准有GBT17213点4和GB4213,泄露等级分为Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ共六个等级;

等级Ⅰ是调节阀按照基础类型设计,可以对Ⅱ,Ⅲ,Ⅳ等级做些修正,根据用户和供方协议,可以不做试验;

等级Ⅱ的泄露量是百分之零点五乘以阀额定容量,一般为双座调节阀和平衡结构的套筒调节阀所要求达到的,密封面为金属硬密封结构;

等级Ⅲ的泄漏量是百分之零点一乘以阀额定容量,一般为双座调节阀和平衡结构的套筒调节阀密封面为金属硬密封结构,比等级Ⅱ要求稍高些;

等级Ⅳ的泄漏量是百分之零点零一乘以阀额定容量,一般为单座调节阀和特殊密封的套筒调节阀,是比较常用的泄露等级;

等级Ⅴ一般为单座调节阀和特殊密封的套筒调节阀,试验时采用最大工作压差;

等级Ⅵ的泄漏量是气泡级别的,泄漏量较小,阀座密封一般是弹性阀座。

关键词: 调节 泄漏 等级

调节阀泄漏有几个等级相关经验

天气预报

最新推荐

页面:/news/view-1782816/ | 耗时:0.4206 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1782816 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1782816 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1782816 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(136769,1110574,1090188,139256,1094739,1125962,138639,1123034,1089718,1104671,1070352,1120988,1128407,143258,1085736,1123923,1090621,1042718,1129335,1097587,1086756,980889,1298466,1086138,1998148,1080301,1094607,1120205,1129585,1110027) ORDER BY field (ArticleID,136769,1110574,1090188,139256,1094739,1125962,138639,1123034,1089718,1104671,1070352,1120988,1128407,143258,1085736,1123923,1090621,1042718,1129335,1097587,1086756,980889,1298466,1086138,1998148,1080301,1094607,1120205,1129585,1110027)