What is Johnson Screen

JX Filtration September 8, 2025 Wedge Wire Cylinder

Wedge wire screen, also known as Johnson screen, is a highly efficient and versatile filtration medium. It is mainly composed of two parts: the wrapped wire and the support rods.

The wrapped wire is typically a V-shaped wire, while the support rods can be round wire, triangular wire, flat wire, or V-shaped wire. The unique V-shaped profile, with a wider outside and narrower inside, allows for easier backwashing and significantly improves filtration efficiency.

Slot size: 0.02–0.5 mm (customizable upon request)
Open area: up to 30%
Length: up to 6 meters
Outer diameter range: φ20 mm to φ1250 mm

Notes:

For our commonly used brush filters: inside-to-outside flow, reverse wrapped, support rods on the outside, vertically arranged, with the wide face of the screen wire inside.
For scraper filters:
- Inside-to-outside flow, reverse wrapped, support rods on the outside, vertically arranged, with the wide face of the screen wire inside (for internal scraper filters).
- Inside-to-outside flow, normal wrapped, support rods on the inside, smooth surface inside, with the wide face of the screen wire inside (for external scraper filters).

Applications:
Wedge wire screens are widely used in petroleum, petrochemical, wastewater treatment, and many other industries.