Johnson Screens Vision:
To be our clients' preferred provider of whole solutions; meeting their expanding global needs for water infrastructure, fluids processing and industrial filtration.
Johnson Screens was founded in 1904 by Edward E. Johnson after he invented the world’s first continuous slot wire wrapped well screen. Considered a revolution in technology for the industry, the continuous slot well screen provided more open area per square foot of screen than other conventional methods, allowing more water into the well with more efficiency.
Continuing the trend of innovative technology, in 1930 Johnson Screens advanced the continuous slot screen and invented the all welded continuous slot wire wrapped well screen. Johnson Screens was now not only the world leader in innovative screening technology, it was the world leader in the water well screening industry.
Over the years Johnson Screens has expanded its water well screening technology into industries such as surface water treatment, food and beverage processing, pulp and paper, oil and gas, mineral and aggregate processing, refining and petrochemical and even architecture.
Johnson Screens originated in St. Paul, Minnesota, USA, and is still located there today. While maintaining its roots, it has grown to a global company with facilities in North and South America, Australia, Asia, Europe and Africa.
Johnson Screens has always been and continues to be a leader in innovation and technology in all industries which we serve.
Johnson Screens - Quality, Health, Safety and the Environment
In all of our operations, Johnson Screens' most important mission is to pursue the highest possible standards to maximize our Quality, Health, Safety, and Environmental performance. In order to achieve this goal, the effective implementations of our policies on these issues are the top priority for all employees.
By maintaining compliance with all applicable laws and regulations within the areas of our operation and by conducting all operations in a manner that promotes safe work practices and avoids risk to our employees, our neighbors, and the environment, we can optimize the value created for our customers.
Our objectives are straightforward:
Enterprise Excellence Process
Since 2007 we have re-focused Johnson Screens culture of excellence through our Enterprise Excellence Process (EEP). EEP focuses on creating a preventative culture with error-free performance. Our policies:
As a result our objective with EEP is to achieve complete internal and external client satisfaction and to conform to mutually agreed requirements the first time, every time, while protecting the well-being of all personnel, assets and the environment.
For our clients, EEP results in advantages such as greater efficiency and more effective planning; processes that better capture client requirements.
Johnson Screens offers a complete array of engineering services to guarantee you receive the perfect solution for your application. We provide custom design expertise for screens in new or existing applications, and can also design for unusual installations.
For large applications, Johnson Screens can optimize a screen’s structural design through an in-depth FEA (Finite Element Analysis) review. We can also provide the best hydraulic design using our CFD (Computational Fluid Dynamics) analysis tools. Johnson Screens engineering team will work with you to make sure customer, user and regulatory requirements are met.
Johnson Screens standard welded construction uses resistance-welding in a continuous rolled motion to join the wire and rods. The resistance welds the continuous length of wire to the rods as it circulates.
Screens can be made in various different formations, including cylindrical, flat, or curved.
Any variation of wire and rod sizes as well as slot opening can be chosen to develop the exact screen of your choice. Screens are available in slot opening from 0.001 in. (25 μm) up to 1 in. (25 mm). Most common materials used are 300 series stainless steel, but many exotic alloys are available to suit specific applications.
A wide range of wire and rod shapes make it possible to achieve the optimum balance of strength, open area, abrasion resistance and dewatering/separation efficiency.
Johnson Screens Round and Strip Support Rods
Johnson Screens round rods are available in diameters ranging from 0.125 In. (3.175 mm) to 0.500 in. (12.7 mm). Strip rods are available in widths from 0.070 in. (1.778 mm) to 0.188 in. (4.775 mm) and heights ranging from 0.375 in. (9.525 mm) to 2.0 in. (50.8 mm).
Open area calculations
To calculate the open area of a certain screen, use the simple formula provided
Johnson Screens Vee-Wire Profile wires range in widths from 0.020 in. (0.508 mm) to 0.195 in. (4.953 mm) and heights ranging from 0.040 in. (1.016 mm) to 0.363 in. (9.220 mm). Other wire shapes (Tri-Wire, Iso-Wire, Iso-Grizzly Wire, Grizzly-Wire, and more) also available.
Johnson Screens shaped support rods range in widths from 0.029 in. (0.737 mm) to 0.151 in. (3.835 mm) and heights ranging from 0.102 in. (2.591 mm) to 0.120 in. (3.048 mm).
Johnson Screens column covers can transform construction structures (raw material) or technical installations (ventilation, etc.) into decorative elements. The slot opening of the column cover screen can be varied to create different visual effects, allowing a range of visibility of the hidden structure.
Screw Conveyors & Screw Presses
Johnson Screens offers a whole range of screw conveyors and screw presses that can be integrated to our screening equipment or can be supplied as a stand-alone unit to suit an application. The screw conveyor is designed for the transportation of municipal and industrial sludge and other wet screened matter. The screw rotates around its axis and pushes the material toward the discharge end. The screw conveyor can also be supplied with a shaftless ...