Description
Our Non-Rising Stem Gate Valve for Shield Machinery (also known as rotary stem gate valve) is a purpose-built industrial valve engineered for shield tunneling equipment and complex fluid pipeline systems. Manufactured in strict compliance with GB/T12234 design standards, this valve features a fully enclosed valve stem structure, which completes opening and closing operations through rotary lifting movement without exposing the stem to the external environment. It is compatible with globally recognized flange standards including ASME B16.5, JB79 and GB9113, with face-to-face dimensions conforming to ASME B16.10 and GB/T12221, and all products pass rigorous inspection and testing in line with API598 and GB/T13927 specifications. Available in sizes from 2” to 24” with a 150LB pressure rating and 80℃ maximum operating temperature, this non-rising stem gate valve delivers stable on-off control for water, gas and other common media. Its full-bore flow path matches the pipeline diameter, minimizing flow resistance and pressure loss, while the internal stem and nut design eliminates external corrosion and physical damage risks, making it ideal for harsh and space-constrained industrial working conditions.
Key Features & Industry-Leading Benefits
Robust Material Construction for Extended Service Life
This rubber-sealed non-rising stem gate valve is constructed with high-strength GGG50 ductile iron for the body, bonnet and wedge, paired with a SS420 stainless steel stem, brass stem nut and EPDM gasket. We also offer cast iron, cast steel and stainless steel material options to meet diverse project needs, delivering exceptional tensile strength and corrosion resistance. The fully enclosed stem design isolates critical components from external dust, moisture and mechanical impact, significantly extending the valve’s service life and reducing maintenance frequency for long-term cost savings.
Superior Sealing Performance for Zero Leakage Operation
Equipped with either soft seal or metal seal between the wedge and valve seat, our shield machinery gate valve provides industry-leading sealing performance. The EPDM rubber-covered wedge ensures tight shut-off, effectively preventing medium leakage even in low-pressure working conditions. Every valve undergoes strict sealing tests to meet API598 standards, eliminating unplanned downtime caused by leakage and ensuring the safety and stability of the entire pipeline system.
Compact Structure for Space-Constrained Installation
Unlike rising stem gate valves that require vertical space for stem lifting, our non-rising stem gate valve features a compact rotary design that needs no additional installation space. This makes it perfectly suited for the narrow internal cavities of shield machinery, underground comprehensive pipe galleries and other space-limited scenarios, simplifying installation procedures and improving engineering efficiency for infrastructure construction teams and engineering procurement contractors.
