What Is The Selection Criteria Of Mechanical Pressure Switches

Posted by uspswitch on December 3rd, 2020

The mechanical pressure switches are much more reliable and cost-effective compared to electronic switches. With the variety of options available in the market, it is easy to find the best switch depending upon your requirements. The working of a heavy-duty mechanical pressure switch is simple, where a diaphragm or a piston opens or closes the circuit in accordance with the pressure in the medium, whether it rises or drops to a certain value. Whenever the pressure reaches the point of switch, the diaphragm or piston releases the pressure on a micro switch. Now, the micro-switch contact will be responsible for either form an open to open circuit or snap closed to close the circuit. You need to know about the mechanical working for pressure switches to know the principle of generator switch pump control switch in detail for different applications.

Selection Criteria For Mechanical Pressure Switches

Mechanical pressure switches are an affordable and most convenient solution for the system where only single switch contacts are required. There are some factors that play an important part in selecting the best switch for your requirement.

Medium and temperature — The temperature and medium are crucial factors when choosing the material for wetted parts, case, and the sensor element. These switches are ideal for applications where the case and the process connections are built of galvanized or stainless steel.

Pressure

The diaphragms are perfect for a system with sensor elements while working on the vacuum and low-pressure applications. On the other hand, the pistons that are mostly built of stainless steel are suitable for applications with higher pressure ranges.

Switch point adjustment

The switch point of the mechanical pressure switches can be determined at the factory or can also be adjusted on-site. The system conditions, like temperature and pressure, vary is recommended to use the adjustable switch for more efficient results.

Hysteresis

Hysteresis is responsible for determining the time when the switch will be reset. In case if the reset value is too large, then the functions of the switch stay active for too long. In conditions where the reset value is too short, the function will move between states.

Other factors

Apart from all the above-mentioned factors, there are some other factors you need to consider, like reproducibility, electrical current and voltage rating, weather protection, resistance to vibration, and shock. Along with things like mounting and process connections also helps in picking the most suitable shut down switch hazard switch.