HAFNER阀HVR531121
HAFNER阀P310701G
HAFNER阀P311121G
HAFNER阀P320701G
HAFNER阀P522501
HAFNER阀P520101
HAFNER阀P520502
HAFNER阀P511121NPT
HAFNER阀P510701
HAFNER阀P510302
HAFNER阀VA341
HAFNER阀ES401
HAFNER阀VA304
HAFNER阀RP2344
HAFNER阀P320304
HAFNER阀RP3344
HAFNER阀P520304
HAFNER阀RP5344
HAFNER阀P311501SR
HAFNER阀P411701SR
HAFNER阀MMD231304
HAFNER阀MMD232304
HAFNER阀MMD233304
HAFNER阀MH 211 012
HAFNER阀MH 211 309
HAFNER阀MH 210 501
HAFNER阀MOH311305
HAFNER阀MH 311 313
外漏
阀门的外漏:其一是阀门与管路采用法兰连接方式时,由于连接垫料、连接螺栓、以及连接件在低温下材料之间收缩不同步产生松弛而导至泄漏。因此可把阀体与管路的连接方式由法兰连接改为焊接结构,避免了低温泄漏。其二是阀杆与填料处的泄漏。