Valves, the actuators that move them and the electronic circuits that control them, are all subject to ageing soon after they are installed. Valve seats wear from repeated seatings and from the liquid or gas that passes through them. A valve may be stroked up to tens of thousands of times a year, which causes screws to reposition, springs to weaken and mechanical linkages to loosen. Electronic components change value over time. All this can produce valves that don’t fully open or close prematurely. This calibration drift can result in improper regulation of the gas or liquid under the valve’s control.
To keep valves operating properly, electronic valve positioners need to be periodically checked. These checks need to be conducted quickly to minimise down time. If calibration drift is found, the valve positioner must also be recalibrated immediately. The Fluke 789 ProcessMeter can test and recalibrate electronic valve positioners. It offers signal sourcing to simulate a controller connected to a valve positioner’s input and can continuously adjust the source current in incremental steps to check the valve’s linearity and response time.
Decades of excellence in mobile and industrial hydraulic solutions Axiom Hydraulics
Hydraulic systems & components
For over four decades, Impro Fluidtek has been at the forefront of hydraulic solutions in mobile and industrial applications. This is borne out by four patents and the sale of over three million hydraulic orbital motors across three continents.
Read more...Acoustic imaging detector for gas leaks and partial discharge Artic Driers International
Hydraulic systems & components
The new SUTO iTEC S532 acoustic imaging detector provides an easy and effective way to locate pressurised air and gas leaks and partial discharge (PD) in industrial high-voltage environments.
Read more...Bending the law of size, power and speed Hagglunds Drives SA
Hydraulic systems & components
The Hägglunds Quantum hydraulic motor range exceeds previous performance limits in torque, speed and efficiency. Hägglunds Quantum is the new name for the Hägglunds CB range, and these direct drives can be used in heavy-duty and mobile applications.
Read more...New Black Bruin hydraulic motors for heavy-duty applications Axiom Hydraulics
Editor's Choice Hydraulic systems & components
Axiom Hydraulics and Black Bruin have been working together since the late 1990s, serving southern Africa’s fluid power, mining, industrial, agriculture and marine industries. Now Black Bruin is extending its rotating shaft motor portfolio. With a patent pending design, the new X-series is engineered to enhance the performance of both new and existing machinery in terms of durability, serviceability and cost-effectiveness.
Read more...Bosch Rexroth Africa strengthens its offering
Hydraulic systems & components
Hydraulic and Automation Warehouse (HAW), a Bosch Rexroth Africa group company, has incorporated Power Team SA’s SPXFLOW and Bolting Systems into its offering.
Read more...Oil-free beer and wine processing
Pneumatic systems & components Hydraulic systems & components
The food and beverage industry depends on superior quality, 100% oil-free compressed air to eliminate the presence of unwanted oil vapour throughout the production line.
Read more...Extending the life of hydraulic cylinders and hoses
Hydraulic systems & components
Hose saver protection sleeves extend the life of hydraulic and pneumatic hoses by eliminating unnecessary expenses from downtime, oil loss, contamination, and replacement hoses.
Read more...Hydraulic connectors with residual pressure
Editor's Choice Hydraulic systems & components
Hydraulic connections are vital in both outdoor and indoor industrial machinery. However, the hydraulics lines frequently require connecting and disconnecting for maintenance or changeover. The goal is to enable quick, easy swaps to enhance machine flexibility and productivity.
Read more...Sun carries the load Axiom Hydraulics
Hydraulic systems & components
When valuable lives are hoisted in the air, reliable load holding technology is at its utmost importance. That’s why you can count on Sun’s excellent load holding cartridge valves.
Read more...How to protect against water hammer SA Gauge
Editor's Choice Hydraulic systems & components
Water hammer is a high-pressure surge or wave created by the kinetic energy of moving fluid when it is rapidly forced to stop or change direction, altering the liquid’s velocity. The progression of the water hammer shockwave needs to be detained and slowed before reaching the instrument sensor. SA Gauge manufactures several such devices in order to achieve this.
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