- Integral structure design of no bolt clamp on valve body and cover. No bolt hole on the valve body.
- Valve stem bearing by gearing lock (Bayonet). No bolt hole in valve stem bearing and packing box.
- No exposed surface on SRS-Ⅲ.100% epoxy resin powder painting on internal.external is possible, and this is 100% corrosion prevented compatible to Ministry of Environment hygienic stability standard.