China Detect potential pressure surges in advance to trigger timely relief. Manufacturer, Supplier, Factory

The classification of ductile iron pipes first depends on their joint connection types, which directly determine installation methods and engineering adaptability. The most common flexible push-on joints (such as Tyton joints) utilize compressed rubber gaskets to achieve self-sealing, allowing post-installation angular deflection (typically 3-5 degrees) to accommodate ground settlement or thermal movement. Another type, mechanical joints (like K-type or Fastite joints), employ bolted gland rings to compress wedge-shaped gaskets, providing higher sealing integrity suitable for pump station valve connections requiring frequent maintenance. Flanged joints feature steel flanges cast or welded to pipe ends, creating rigid connections via high-strength bolts, specifically designed to withstand high-pressure thrust or interface with industrial equipment.

A butterfly valve is a structurally simple and compact fluid control valve. Its core components include a valve body, a rotatable disc-shaped "butterfly" plate, a stem that drives the disc, and a sealing seat. The valve operates through a 90-degree rotational motion: when opening, the disc rotates from a position perpendicular to the pipeline axis (closed state) to parallel with it (fully open), allowing unobstructed flow; when closing, the disc rotates 90 degrees back to block the flow path, with its edge pressing tightly against the seat to form a sealed ring, thereby stopping fluid flow.

Ductile iron pipes widely use flexible joints for connections. These joints allow the pipe to deflect and expand/contract within a certain range to accommodate ground settlement or temperature changes.

The sealing principle of the GT type interface of GT type ductile iron pipe is similar to that of the T type interface. As the internal pressure of the pipeline increases, the tighter the contact surface between the rubber ring sealing sleeve and the socket, the better the sealing effect.