SA Gauge is a manufacturer and supplier of pressure and temperature measurement instrumentation, with branches in Durban, KwaZulu-Natal and Kempton Park, Gauteng.
The company, which recently celebrated its twenty-second year of designing and manufacturing pressure and temperature gauges for industry, manufactures its products to international and original-equipment-manufacturer (OEM) standards.
SA Gauge specialises in delivering products to special OEM requirements within short lead times. Special dials and ranges can typically be manufactured in two days. Customer logos are designed and printed in-house, ensuring quick turnaround times.
Using conventional, computer numerically controlled machining centres and a range of hydraulic and eccentric presses, the company manufactures parts for the instruments and related accessories in-house, ensuring that all parts are available on time, when needed.
Besides pressure gauges and thermometers, the company also manufactures a range of related accessories, such as diaphragm seals, pressure testing kits and related equipment for the accurate measurement of pressure and temperature in the industrial, mining, chemicals, hygiene and process industries.
Modern chemical processing and process manufacturing procedures demand greater accuracy and reliability from their pressure measuring instruments. To reduce costs, production downtime must be kept to an absolute minimum. ln some applications where there are chemical or hygiene considerations, it is necessary to isolate the pressure measuring instrument, usually a gauge or a transmitter, from the process medium.
This isolation is achieved by using a pressure-sensitive diaphragm made from a material resistant to the process medium enclosed in a system fitted to the base of the instrument.
Diaphragm seal accuracy at 20 ºC may vary from 0.5% to 1% according to the chemical seal. These values must be added to the accuracy class of the indicating instrument. The accuracy of vacuum, however, cannot be guaranteed beyond –0.85 bar in the standard executions. This is due to the fact that most filling fluids contain microscopic amounts of air or trapped gases, which tend to expand significantly as a pressure of absolute zero is approached. This expansion affects the measuring element in the instrument.
The diaphragm is an elastic measuring element. It can be manufactured out of different materials such as stainless steel 316, hastelloy, tantalum or other materials, and, if required, it can be provided with various protection foils or coatings to ensure compatibility with almost any kind of medium.
Contact SA Gauge to assist with technical requirements and questions.