Non-rising Stem Grooved Gate Valve

The Non-rising Stem Grooved Gate Valve is a compact, space-saving pipeline shut-off valve specially designed for limited installation spaces, concealed piping and fire protection engineering. Adopting non-rising stem structure and standard grooved connection ends, this valve avoids the vertical stem extension of traditional gate valves during opening and closing, effectively saving installation height while retaining reliable full-bore flow performance and zero-leakage sealing capability. It is widely recognized as an ideal shut-off device for ceiling concealed pipelines, narrow pipe wells and densely arranged fire water supply systems, fully meeting the compact and safe layout requirements of modern building and municipal pipeline projects.

The valve body is integrally cast from high-strength ductile iron with stable mechanical strength and excellent pressure-bearing capacity. The surface is treated with electrostatic epoxy resin coating, forming a smooth and dense protective layer that is waterproof, rust-proof and corrosion-resistant. The advanced coating process prevents paint peeling and oxidation even in humid, dusty and long-term buried environments, ensuring long-term structural stability and appearance integrity. Compared with traditional flanged gate valves, this grooved version features lighter weight and higher structural rigidity, delivering stronger adaptability for complex on-site construction conditions.

Featuring a non-rising stem design, the internal thread transmission drives the gate plate to move up and down inside the valve body without exposing the stem outward. This structure fundamentally solves the problem of insufficient installation height caused by stem protrusion, greatly improving space utilization. The valve stem is made of high-precision polished stainless steel, which is anti-rust, wear-resistant and deformation-resistant, ensuring flexible and smooth switching operation after long-term repeated use. The built-in sealing packing maintains stable stem tightness, effectively preventing medium leakage and external dust infiltration.

This valve adopts high-performance resilient seated sealing technology with fully wrapped EPDM rubber gate disc, realizing bidirectional zero-leakage shut-off under rated pressure. The elastic rubber layer can automatically compensate for tiny gaps caused by pipeline vibration, pressure fluctuation and minor abrasion, maintaining excellent sealing performance under long-term static water pressure and intermittent emergency operation. The rubber material features outstanding aging resistance, water hammer resistance and low-temperature adaptability, perfectly matching the 24-hour standby working mode of fire protection and water supply pipelines.

Designed with a full straight-through flow channel, the valve ensures minimal fluid resistance and no sediment accumulation during operation. The unobstructed pipeline passage avoids blockage caused by impurities, ensuring stable water supply flow and emergency water delivery efficiency of fire systems. Equipped with standard grooved ends, the valve supports fast clamping installation without welding or flange bolting, greatly shortening construction cycles and reducing labor and engineering costs. The convenient disassembly feature also facilitates daily inspection, maintenance and pipeline system renovation.

With standard PN10 and PN16 pressure grades and a complete diameter range from DN50 to DN300, the Non-rising Stem Grooved Gate Valve strictly complies with fire protection and municipal water supply industry standards. It is widely applied in building fire hydrant pipelines, automatic sprinkler systems, indoor concealed water supply pipelines, HVAC circulating water systems and municipal water pipe networks. It can also be equipped with signal devices and electric actuators to realize remote monitoring and automatic control.

In summary, the Non-rising Stem Grooved Gate Valve integrates space-saving non-rising stem structure, zero-leakage resilient sealing, anti-corrosion durability and efficient grooved installation. It solves the installation limitations of traditional gate valves in narrow spaces, providing stable, reliable and cost-effective pipeline shut-off solutions for modern high-rise buildings, commercial complexes and municipal fire protection engineering.