
Advanced Sand Prevention Device for Advanced Sand Prevention Device Bridge-Type Sand Sinking Valve System with Enhanced Sand Prevention Sand Control Screen Pipe. Dual-Seat Sealing Design: Two ball seat sealing structures prevent leakage and improve sealing reliability. Pressure-Activated Lower Seal: Spring and ball cage ensure firm contact, opening under set pressure for reliable sealing. Free-Fall Upper Seal: No starting pressure required; protects ball seat and steel ball from high-pressure impact damage. Composite Sand Control Screen: Supercorrugated stainless steel composite screen with single-layer metal screen for flow guiding. Customizable Hook Type: Hook types are customizable, including 2 7/8 TBG and 3 1/2 TBG options. CNC Milling Manufacturing: Manufactured using CNC milling process with polished surface treatment for durability. Versatile Application: Applicable to hydraulic packer separation, water shutoff, and water well completion.