Shandong Lede has a strong team for product research and design. All molds are designed using an advanced CAD/CAM computer aided system, based on a finite element theory in order to optimize the product structure.
The coupling housing section allows it to self-center around a pipe, and encircle and retain the gasket against the application of pressure from the internal system vacuum. Materials include ductile iron per ASTM A536 Grade 65-45-12, with alternatives including steel, stainless steel, and copper.
The heat treated oval neck track head bolts join and secure the housing sections tighter. The design permits single-wrench tightening, reducing installation time.
The unique, single piece 'C' style design of the gasket has been engineered to provide a pressure responsive, leak tight seal in both pressure and vacuum applications.