过滤水管（Johnson屏幕）

Low-Carbon, Galvanized or Stainless Steel construction. Provide optimum well development and access to the aquifer. Large open area. Water enters at lower velocity, reducing screen surface erosion and encrustation. Designed and constructed to operate under different depth conditions, with the optimum strength/open area ratio. 1" to 26" diameters. Slot openings from 0.10 mm (0.004") up. Lengths up to 6 meters. Welding-ring or threaded ends. Standard designs for installation depths of 100, 200, 350 and 600 meters. Other installation depth designs available upon request