Z45X Buried Non-Rising Stem Resilient Seated Gate Valve

Z45X buried non-rising stem resilient seated gate valve is specially engineered for direct underground installation in municipal water supply networks,community water distribution pipelines,urban drainage and irrigation systems.As an upgraded NRS resilient seated gate valve,it can be buried directly under roads without constructing traditional valve manholes,effectively cutting construction investment,reducing road excavation and avoiding safety hazards caused by missing manhole covers.This product complies with GB/T12238,DIN3352 F4 and EN1171 standards and has become a mainstream shut-off solution for modern buried water pipelines worldwide.

The valve adopts classic non-rising stem structure.The stem will not stretch outwards during opening and closing,saving underground installation space and protecting the stem from soil corrosion and external extrusion.The wedge gate is integrally vulcanized with high-quality EPDM rubber,forming a fully encapsulated elastic sealing structure.Relying on rubber elastic deformation,it achieves bidirectional bubble-tight zero leakage and automatically compensates sealing surface wear caused by long-term operation.Different from conventional metal-seated gate valves,it maintains stable sealing performance even with tiny sediment inside pipelines.The flat-bottom full bore cavity prevents sludge accumulation,keeps low flow resistance and ensures smooth medium circulation.

The valve body and bonnet are manufactured from high-strength ductile iron QT450-10.Inner and outer surfaces are coated with fusion bonded epoxy powder coating,featuring excellent anti-corrosion performance to resist groundwater,soil acid and alkali erosion.The stem is made of stainless steel with rolled thread,equipped with multiple waterproof sealing rings to stop underground water infiltration into the valve interior.Standard pressure grades cover PN10 and PN16,nominal diameter ranges from DN40 to DN600.Flange dimensions follow ISO7005,convenient for matching global standard water pipelines.

For buried working conditions,this series supports customized extension spindle according to burial depth.Operators can open and close the valve on the ground surface without digging pits.Optional locking cap structure prevents unauthorized random switching of pipelines,suitable for urban public water supply management.Multiple driving methods are available:manual square cap,handwheel,bevel gear transmission and electric actuator for automatic pipeline control.

Every Z45X buried resilient seated gate valve undergoes strict shell hydrostatic test and seat tightness test before delivery in accordance with ISO5208.Blowout-proof stem design eliminates medium leakage risks under abnormal pressure.It only allows operation under fully open or fully closed status and is not applicable for flow throttling;partial opening will trigger medium cavitation and damage rubber sealing wedge.

Compared with ordinary above-ground gate valves,its prominent advantages lie in manhole-free installation,low later maintenance frequency and long underground service life.Widely adopted in municipal tap water projects,residential district main pipelines,park irrigation and sewage pipe networks.Our factory can provide customized length of extension rod,anti-theft structure and special coating solutions to satisfy diversified buried pipeline engineering demands from global clients.Reliable sealing,robust structure and competitive cost make Z45X buried resilient seated gate valve a preferred selection for underground fluid shut-off projects.