First, understand the working principle and external structure of the safety valve. We can see the longitudinal profile of the safety valve. This accessory is installed on the body of the Roots blower. When the pressure of the Roots blower is too high, the safety valve will automatically relieve pressure under the pressure to ensure the stable operation of the Roots blower.
The fan safety valve should work under low pressure, so the contact surface between the valve seat and the valve body is precision machined. If there is any foreign matter attached around the valve seat, the foreign matter will be adsorbed on the contact surface when the valve body works, thus forming a leak. In addition, please check whether the safety valve is impacted during handling, which is also the cause of leakage.
Now let's take a look at the vent valve, which is connected to the pipeline. The main function of the vent valve is to ensure that the roots blower operates under air pressure. For example, during the test run, the vent valve should be opened to make the fan operate under no-load condition; For another example, in case of emergency failure of the equipment, if it is too late to cut off the power, the vent valve can be opened first to make the equipment in the no-load state, and then cut off the power. The vent valve is installed before the check valve, that is, after the fan is connected to the pipeline, the vent valve is connected, and then the check valve is connected.
When starting Roots blower, observe the pressure gauge and rotate it. Tighten the gate valve to make the pressure gauge greater than the set value by about 10%. Loosen the fixing nut, and turn the adjusting screw counterclockwise until the safety valve discharges air, during the process of tightening the gate valve. When the set pressure is not reached, the safety valve discharges air. Turn it clockwise again until the adjusting screw does not rotate. Turn it counterclockwise at the position where the air is discharged, and arrange it correctly until the air comes out (clockwise rotation increases the set pressure; counterclockwise rotation decreases the set pressure). Turn the lock nut and adjust the screw. Loosen the gate valve and reduce the pressure so that the air valve does not exhaust. Ensure that the air valve in the exhaust works under the set pressure. Retightening the gate valve will increase the pressure.
When the vent valve is installed, it can be connected to the outside or the inside, depending on its own situation. The vent valve outlet should not be aimed at people, and should avoid crowded places, and the outlet should not face upward to avoid falling dust, rain or insects.
In China, the two types of accessories are clearly classified. Due to technical conditions, some integrated accessories may be developed abroad, that is, combining the two into one, depending on the specific equipment conditions.
I believe that after reading the above contents, you should also understand the differences between the safety valve and the vent valve of Roots blower. I hope it will help you.
Text label: Roots blower
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