Vertebral ring, spring, spring seat and clasp, auxiliary seals have "o" shaped rubber ring and PTFE wedge ring, quiet ring for graphite materials (M106K).
The 400 series adopts durable spring and wedge block structure, suitable for overloading and long life requirements of the occasion.
在400系列中采用耐久弹簧和楔型块结构，适用于重载和有长寿命要求的场合。
3
A newly developed pipeline plug is composed of a central pipe, balloon, piston, spring, clamp, backplate, inside and outside joints, connecting plate and a wedge key.