Z45x Non-Rising Stem Resilient Seated Gate Valve

Z45X non-rising stem resilient seated gate valve is designed and manufactured in strict accordance with Chinese national standard GB/T12238. It is a widely adopted shut-off valve applied in municipal water supply, residential water distribution, building plumbing, irrigation and sewage pipelines. Featuring compact structure, reliable sealing and convenient installation, this valve is the mainstream choice for above-ground and buried water pipeline systems.

This valve adopts classic non-rising stem structure. The stem will not extend outward during opening and closing movements, saving installation space and effectively protecting the stem from collision, extrusion and external corrosion, which makes it highly suitable for underground direct burial and narrow valve wells. The wedge disc is integrally vulcanized with high-quality EPDM rubber, forming an all-round elastic sealing assembly. Relying on the elastic deformation of rubber, bidirectional zero-leakage sealing can be achieved. The sealing surface can automatically compensate minor abrasion generated during long-term operation, and maintain stable sealing performance even if a small amount of sediment exists inside the pipeline.

The valve body and bonnet are cast from high-strength ductile iron QT450-10 with excellent toughness and pressure-bearing capacity. The inner and outer walls are treated with fusion bonded epoxy coating. The coating is non-toxic and meets the requirements for potable water transportation, while providing long-lasting protection against groundwater and soil corrosion. The inner cavity adopts flat bottom full bore design, which avoids sludge accumulation, reduces flow resistance and ensures smooth fluid circulation.

The valve stem is made of stainless steel with precision rolled threads. Multiple groups of high-performance packing seals are equipped to prevent medium leakage along the stem. Blowout-proof stem structure greatly improves operation safety under fluctuating pipeline pressure. Nominal pressure grades include PN10 and PN16. The flange dimension follows GB standard, and nominal diameter covers DN40 to DN600, which can match most domestic and overseas common water pipelines.

Available operation forms include manual square head, handwheel and bevel gear drive. It can also be fitted with electric actuators to realize automatic remote control. For buried working conditions, customized extension spindles can be provided to realize ground operation without digging valve pits. It should be noted that the Z45X resilient seated gate valve can only work under fully open or fully closed state. Throttling is forbidden. Long-term partial opening will cause high-speed medium scouring and permanent damage to the rubber wedge.

All finished valves pass strict shell strength test and seat tightness test in accordance with ISO 5208 before delivery. Compared with metal seated gate valves, Z45X has obvious advantages of low operation torque, tight sealing and low maintenance cost. Widely used in urban tap water network, community main pipelines, landscape irrigation and wastewater treatment pipelines. Our factory supports customized anti-theft lock caps, special coating and extension rod length to satisfy various engineering demands. Stable quality and competitive cost make Z45X GB standard non-rising stem resilient seated gate valve one of the most popular shut-off valves for global water supply projects.