Gate Valve

A: Gate valves are designed exclusively for fully open or fully closed service. If a gate valve is held partially open, the high-velocity fluid stream strikes the gate and sealing components directly, causing severe fluid turbulence. This rapid exposure to accelerated flow causes rapid wear, erosive damage, and vibration, which permanently compromises the valve's ability to form a tight, leak-proof seal when shut.

A: Traditional gate valves often feature a bottom recess or cavity where sand, rust, and silt settle, preventing the metal wedge from closing completely and causing downstream leakage. Our resilient seated gate valves utilize an EPDM-encapsulated wedge and feature a smooth, flat-bottom bore. Debris is flushed away by the medium naturally, and the flexible rubber wedge compresses perfectly into the bore wall, ensuring zero-leakage performance and tight sealing even in pipelines carrying suspended particulate matter.

A: The choice depends on your installation space and monitoring requirements. Rising stem valves feature an external thread that lifts alongside the gate, making it immediately clear to line operators whether the valve is open or closed. However, this requires significant vertical clearance. Non-rising stem (NRS) valves keep the stem inside the body during rotation, offering a compact profile perfect for underground buried lines, trench installations, or cramped equipment rooms.

A: For standard configurations in ductile iron with regular size parameters (2” to 12”), we maintain stock buffers allowing dispatch within 1 to 2 weeks. For specialized B2B orders requiring private brand nameplates, proprietary logo castings, or premium internal alloy components, our typical production turnaround ranges from 4 to 8 weeks, depending on mold availability and production line scheduling.