Adjustable pressure switches, unlike traditional pressure switches, are not manufactured with fixed pressure set points but are field adjustable, meaning that the set points can be adjusted at the place of operation. As a result, adjustable pressure switches can be utilized at a range of pressures, allowing for use on multiple devices or pressure systems. In order to adjust the set points, there is typically a control on the switch, which can be electrical or mechanical, which allows for the required pressure change.
Adjustable pressure switches are beneficial for wide-ranging industries such as: defense, for applications in unstable environments or that require travel to different terrains; aerospace, for entering, exiting and re-entering the earth's atmosphere; industrial manufacturing, for applications with multi-step processes, or even multiple different process; and medical and instrumentation, in which testing is performed at various pressures in order to establish expected results. Available in single, double or triple switch configurations, each switch in the configuration may be individually adjusted to required pressures. In addition, adjustable pressure switches may be used with a wide range of liquid or gaseous mediums, such as hydraulic fluids, air and chemicals.
Adjustable pressures switches can come in a wide range of sizes and configurations as well as being actuated or powered through various means. Adjustable pressure switches are most often powered by electromechanical means, although they can be fully mechanical or electrical. In addition, many different means of actuation can be used for adjustable pressure switches including diaphragms, pistons and electronic sensors with snap action switches. Diaphragms are very common, and are actuated as the result of pressure fluctuation when the flow exceeds the set point. When this occurs, the diaphragm is pushed open and the medium is able to flow through. Pistons are also fairly common, and are actuated in much the same way as a valve, opening or closing in response to high pressure flow. Electronic sensors with snap-action switches are the most common means of actuation for electromechanical adjustable pressure switches. If the pressure reaches above or falls below the set pressure points, the electronic sensors will send a signal to the snap-action switch, which will immediately close off medium flow so that the process is not compromised in any way. Adjustable pressure switches are typically differential, meaning that they measure or regulate between two points of differing pressure and actuate based on these set points.
Adjustable Pressure Switches - Tecmark Corporation