R&D

• No. Patent Name Application No. Publication Date
• 1 Zircon sand mullite sand core for silica sol precision casting and its manufacturing method CN201410274366.8 2014/12/10
• 2 Low-torque auto-return ball valve CN201420214872.3 2014/11/12
• 3 A novel three-way ball valve CN201420214858.3 2014/10/29
• 4 Gating system for large-size flange valve cover CN201020691845.7 2011/8/10