China BS 5163 Flanged Resilient NRS Gate Valve Manufacturer, Supplier, Factory

The main application area is the municipal sewage pressure pipe network with high anti-corrosion requirements. Sewage treatment plants have certain requirements for pressure resistance, and the medium contains polyphenols and cyanide, which are corrosive substances that may harm the industrial sewage pipe network system.

​While UPVC pipes form the backbone of modern plumbing networks, it's the UPVC accessories that give these systems their versatility and longevity. These meticulously engineered fittings—elbows, couplings, valves, and adapters—serve as the critical junctions where direction changes, flow control, and system integrations occur.

Beneath our cities and within our walls, UPVC and HDPE pipes form the hidden circulatory systems of contemporary infrastructure. These polymer pipes have steadily replaced traditional materials, each bringing distinct advantages to different applications.

​Beneath our cities' streets lies an unsung hero of urban development - ductile iron pipe. This remarkably durable material has quietly revolutionized water distribution systems since its introduction in the mid-20th century, offering an ideal balance of strength and flexibility that traditional cast iron couldn't match.

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.

Flange is a "Connector": Used to permanently connect pipes and equipment; it is the foundation for building the system. Dismantling Joint is a "Maintenance Component": Used to facilitate the disassembly of specific equipment; it is an assistant for system maintenance. With its unique telescopic structure and limit bolt design, it allows you to create space for equipment removal by loosening only a few nuts, avoiding the hassle of removing numerous flange bolts or cutting pipes.