Structural Characteristics of

• Utilizing a Non-Rising Stem (NRS) design, the stem only rotates without vertical movement during operation. This ensures the overall height remains constant, significantly reducing clearance requirements, making it ideal for underground pipelines, buried service cabinets, or pump rooms with restricted head space.

• The body is crafted from QT450 Ductile Iron, offering mechanical properties similar to carbon steel with excellent tensile strength and elongation. When faced with ground subsidence or traffic loads, the valve body can buffer deformation through its inherent toughness, preventing brittle fractures common in gray iron and ensuring long-term system safety.

• The wedge features full EPDM rubber encapsulation, utilizing resilient deformation to create a tight seal against the flat valve seat. This “soft seal” design achieves bubble-tight bi-directional shut-off and effectively prevents closure failures caused by sediment buildup, a common issue in traditional metal-seated valves.

• Both internal and external surfaces are coated with at least 250μm of fusion-bonded epoxy (FBE) powder, forming a smooth and highly adhesive protective layer. This process meets potable water hygiene standards, prevents secondary contamination, and its smooth finish reduces fluid resistance while inhibiting scale attachment over time.

• The internal cavity features precision-cast side guide rails that maintain wedge alignment during travel. This guide rail design reduces mechanical friction between the wedge and seat, which, combined with the high-precision stem nut, ensures low operating torque even for large-diameter valves, extending the service life of the operation mechanism.

Main Components Material

Class 150LB Main Connection Dimensions

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