Detailed explanation of the functions of safety valves and pressure relief valves in Roots blowers
Roots blower is a commonly used industrial equipment, and in order to ensure its stable operation, it is usually equipped with valves and pressure relief valves. The following is a detailed introduction to these two types of valves:
1、 Safety valve
1. Main function:
Explosion accident caused by overpressure of Roots blower. When the outlet pressure of the Roots blower exceeds the specified value, the valve will automatically open to release excess pressure, thereby ensuring the operation of the Roots blower.
Help the Roots blower reach the specified pressure value, making the operation of the Roots blower smoother.
2. Working principle:
Valves usually automatically open when the pressure reaches the set value, release the pressure, and automatically close when the pressure drops within the range.
The spring and pressure sensing mechanism of the valve enable it to quickly open when the set pressure is reached, releasing excess pressure.
3. Adjustment and inspection:
The set pressure of the valve generally exceeds about 10% of the pressure increase.
When adjusting the valve, it is necessary to observe the pressure gauge, tighten the gate valve while making the pressure exceed the set pressure by about 10, and then adjust the adjusting screw until air is discharged from the valve.
Regularly check whether the valve is working at the set pressure to ensure its normal operation.
2、 Pressure relief valve
1. Main function:
Release excessive fluid or gas to cause damage to the system due to overpressure. When the system pressure exceeds the set pressure threshold, the pressure relief valve will open, allowing fluid or gas to escape the system and maintain pressure.
2. Working principle:
The pressure relief valve can be operated manually or automatically, depending on the design. It usually has a more complex control system that allows for finer adjustments.
When the exhaust system pressure of the Roots blower is too high, the pressure relief valve will automatically open. The piston is pushed up by the exhaust pressure, redirecting the gas back to the intake side of the Roots blower, thereby reducing the pressure at the exhaust port.
When the pressure of the exhaust system drops to a normal level, the pressure relief valve will automatically close and the Roots blower will continue to operate at the predetermined pressure.
3. Application and advantages:
Pressure relief valves are typically used in systems that require control or maintenance of a specific pressure range, rather than immediately opening when the system experiences overpressure.
It allows for more precise pressure adjustment, helping to protect Roots blowers from damage caused by pressure fluctuations.
3、 Summary
The valves and pressure relief valves of Roots blowers differ in design and function, but work together to ensure the stable operation of the Roots blower. Valves are more focused on quickly releasing pressure in case of system overpressure to prevent danger, while pressure relief valves are more focused on releasing pressure when the pressure exceeds the set threshold to protect the system. Both are essential components of Roots blowers.
