1. Brief Introduction

Johnson screen is composed of support rods and V-shaped wire, adopting the advanced full contour welding fabrication process. Each intersection is connected by fusion welding, that it has strong structure, good mechanical performance. The continuous uniform stability of screen slots is controlled by the computer system.

The continuous slot formed by the V-shaped wires ensures a two-point contact between the particles and the slot, which minimizes clogging, and maintain smooth flow. Continuous slots ensure larger aperture ratio, larger flow area, and minimize underwater velocity of permeability, keeping sands away from the pipes even in higher water pressure. Slot size can vary according to difference service.

2. Parameter

2.1 Basic Data

Slot(mm):up to 25, 0.025 for minimum

Opening ratio: opening area can be up to 60%

Material: low carbon steel, low carbon steel galvanized, stainless steel(304,316L, 321 etc.) Special material or alloy material is available for customers` requirement of special service.

Length (mm): max available length is 6000

Nominal diameter (mm): up to 1200, 25 for minimum

Connection: groove butt welding connection or threaded connection

Applicable code: contour welding stainless steel pipe (SY5182-87)

Specification and size is customized