China Gate Valve Manufacturer, Supplier, Factory

​If ductile iron pipes are compared to the "blood vessels" of the city, then ductile iron pipe fittings are the "joints" that allow these blood vessels to operate flexibly. These seemingly inconspicuous connecting parts play a vital role in various pipeline projects.

A Double Eccentric Flange Butterfly Valve is a high-performance industrial valve characterized by its dual-offset design of the stem axis. The first offset positions the stem axis away from the centerline of the disc sealing surface, significantly reducing friction during opening/closing. The second offset places the stem axis away from the pipeline/valve body centerline, enabling progressive linear contact sealing between the disc and seat when closed. This structure dramatically enhances sealing reliability and service life, making it suitable for demanding conditions involving medium-to-high pressure, high temperature, and corrosive media.

​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.

Ductile iron pipes offer various connection methods, with the optimal choice differing according to environmental conditions. Each method has distinct advantages and limitations, while project specifications also vary significantly. This article aims to guide your selection of the most suitable connection approach.

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.

The Flanged Resilient NRS Gate Valve with Bypass Outlet (Z45XL) is a gate valve combining resilient sealing (excellent seal, good impurity tolerance), flanged connection (reliable, easy maintenance), and a non-rising stem (space-saving). Its core value lies in the integrated bypass system, which is used to balance upstream and downstream pressure before opening the main valve. This significantly reduces operating torque and protects the main valve from damage caused by opening/closing under high differential pressure, ensuring safe, reliable, and long-term operation in critical applications. It is widely used in water systems, fire protection, and industrial settings requiring pressure equalization at pipeline control points. The model Z45XL explicitly identifies its flanged connection, geared operation (broadly), resilient seat, and bypass features.