What advantages do pressure switches with metal bellows offer and what is the basis for these? The advantages are based on the seamless design of the measuring system. This solution enables permanently stable repeatability and at the same time, eliminates the risk of leakage.
Bellows measuring systems are based on a mature manufacturing technology. The production of metal bellows, for example, from stainless steel or a copper alloy, takes place in several steps. Circular discs are first cut from a flat piece of metal and these are then shaped into cup-shaped objects. They are softened through an annealing process in a furnace at more than 600°C and then drawn into long, thin-walled and seamless tubes.
Constant elasticity
The tubes are corrugated by using forming tools at high pressure and then trimmed to the designed size. In the next stage, the spring-like metal cylinders are pressed together in accordance with the specified dimensions (length and outer and inner diameter). This creates the constant elasticity needed for the stable repeatability of movement. In the final step, the bellows are degreased and given a protective coating against corrosion.
Seal-free functionality and permanent accuracy
In a pressure switch, the metal bellows is brazed or welded to the process connection. Its other end is in contact with the transmission mechanism. This means that the instrument has a fully seamless measuring system without the need for any rubber sealing materials and the risk of leakage is eliminated. This feature makes pressure switches with metal bellows suitable for a wide range of applications. Process reliability is also guaranteed with liquid media.
A metal bellows changes its length in line with the pressure. When a defined switch point is reached, it triggers the switching function via a transmission mechanism. If the pressure drops or rises again, the bellows returns to its original shape and the switch contact returns to its original position.
The expansion movement of a metal bellows has a high linearity. The switch differential, which is precisely adjusted via a specific calibrated spring system, remains correspondingly constant. This ensures the accuracy of pressure control and switching, even over a long period of time.
Electronic manometer with LED display ifm - South Africa
Pressure Measurement & Control
The new generation of PG type manometers are equipped with IO-Link and modern display units. Illuminated LED markings provide a quick overview of the current measured value. In addition to the various setting options for the display unit, IO-Link offers other advantages such as easy commissioning, quick sensor replacement and remote access options.
Read more...Differential pressure measurement in gas extraction and power generation project VEGA Controls SA
Pressure Measurement & Control
Methane exploration and extraction in Lake Kivu in the East African Rift Valley has primarily focused on gas composition analysis. The VEGABAR 82 pressure transmitter was used for differential pressure measurement, the key to monitoring gas levels within the lake.
Read more...Unique industrial asset monitoring solution WIKA Instruments
Sensors & Transducers
WIKA WikaPredict offers a unique industrial asset monitoring solution, combining advanced sensors and artificial intelligence. As a leader in predictive maintenance, it helps clients enhance operational performance and increased efficiency.
Read more...Don’t buckle under pressure VEGA Controls SA
Pressure Measurement & Control
In Africa, urban populations are increasing and infrastructure is expanding at an unprecedented pace. This makes sustainable water management and treatment more crucial than ever. By investing in VEGA pressure instrumentation, water utilities and municipalities are equipping themselves with pressure sensors that facilitate sustainable water management focused on efficiency, reliability and resilience.
Read more...VEGA handles the pressures of water treatment systems VEGA Controls SA
Pressure Measurement & Control
A water treatment system for a major metropolitan area in the Midwestern United States demands careful monitoring and management of processes across its sprawling network. Choosing VEGA for its process automation needs meant more than just obtaining precise and reliable pressure sensors.
Read more...Monitoring the health of systems SA Gauge
Pressure Measurement & Control
Pressure and temperature gauges are vital instruments in various industries. However, they are susceptible to failures that can compromise their accuracy and reliability. When these gauges fail, the consequences can be severe.
Read more...Enhancing beer brewing precision VEGA Controls SA
Pressure Measurement & Control
Brewing beer is a complex process that requires utmost precision in every step. To ensure precision, it is crucial to measure and control the pressure and point levels in the wort kettle and hops dissolver. Using VEGA instrumentation can offer numerous benefits to breweries.
Read more...Greener mining through water management strategies VEGA Controls SA
Pressure Measurement & Control
Water scarcity is a pressing concern in South Africa, leading to the establishment of stricter regulations on water discharge and management. To promote greener mining operations that minimise environmental impact and optimise resource utilisation, responsible dewatering practices are essential.
Read more...Pressure sensors for hydrogen applications Instrotech
Pressure Measurement & Control
Keller manufactures isolated piezoresistive pressure sensors. The great advantage of the piezoresistive measuring principle is its high stability.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version