Working pressure is the standard level at which a system operates. Safety valves and gauges are used to prevent catastrophic failures. Pressure can be controlled by charging the system and using valves. Temperature and altitude affect pressure. Chronic over or under pressurization can lead to malfunctions and should be evaluated by a technician.
Working pressure is the standard pressure level at which a system operates, usually within a fairly narrow range of tolerances. Many systems ranging from fuel lines in vehicles to space suits are designed to operate under pressure and will fail when there is no pressure. Generally, if the pressure is too low, the system cannot function, and when it is too high, there is a risk of creating an explosion in the system, as the components cannot tolerate the high pressure. Safety valves and other safety measures are used to prevent catastrophic system failures.
On most pressurized systems, a pressure gauge shows the current pressure. It will often highlight the operating pressure in green so people know when the system has enough pressure to be operational. The lower pressure may be yellow, alerting people to the fact that the system is not yet pressurized or that there is a problem of some kind preventing full pressure, such as a leak or lack of gas. The high pressure area is often highlighted in red and alarms can go on when it goes above a certain level.
Pressure can be controlled in a system by a number of means including using various ways to charge the system to bring it up to maximum pressure and controlling the pressure flow with valves. The system is designed to build up and maintain working pressure unless a problem occurs. Some examples of problems may include weak joints, leaks, improperly set valves, and other faulty components. The pressure can start to get too high under a number of circumstances. To reduce pressure, valves can be opened to release it, and people can also turn off the system to stop adding more pressure.
Typically, a system manual contains information about normal working pressure, maximum working pressure, and maximum allowable working pressure. This information can also be printed on a nameplate on the side of a piece of equipment so people can quickly reference it. One important thing to be aware of is how pressure can vary, depending on temperature and altitude. With vehicles, for example, people should check and fill their tires when they’re cold, rather than after the car has been driven for a while. The hot air from driving can fill your tires and make them feel full when they’re not.
If a system is chronically over or under pressurized, this can lead to malfunctions. It is also a sign of an underlying problem that needs to be addressed and should be evaluated by a technician to learn more about what is going on.
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