Ball valve 11F, 41F, 11H, 41H
41H flanged ball valve type through the use of alloy steel seal. In addition there is a complete expression of Q words, there are nominal pressure such as Q11F-16 Q41F-16
41F flanged ball valve type sealed through using tetrafluoroethylene; 11H is threaded through valve type the alloy steel seal;
The ball in, 11F first said the connection mode of "1" threaded connection, second said that the structure of "unit valve 1" straight through, third said "F" said sealing material is PTFE seal;
