- Drilling Spool API Standard
- 2016-10-25 00:24
- The design conforms to the API Spec 6A cross.The seals surface is welded with stainless steel to improve.the anti-corros
- Manual Flat Gate Valve With Rising Stem
- 2016-10-23 02:17
- 1.With the balance stem for the converniece of open and close.2.Metal seal betwwen the body and bonnet.3.Low -operating