Problems starting the vacuum pump
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Current startup procedure: 1. First, open the inlet backflow valve; 2. Start the vacuum pump; 3. Open the main inlet valve and close the backflow valve. I would like to ask the experts: is it possible to skip opening the backflow valve and instead directly open the main inlet valve before starting the vacuum pump? ? ? ? ?
The vacuum pump should be started with the lowest possible load (minimum current); only after it is confirmed that the equipment is operating properly can the load be increased gradually as needed (by reducing the inlet drain valve), so that the vacuum pump enters its operating mode according to requirements. If the drain valve is not opened, the equipment will start under load, and it will also be impossible to control the working pressure you need.
What kind of vacuum pump are you using – a reciprocating pump or a water circulation vacuum pump? Generally, one should first open the outlet and check that the lubricating oil and cooling water are in good condition. For a reciprocating vacuum pump: 1. Open the outlet and connect the discharge line; 2. Start the motor; 3. Open the inlet, while also closing the discharge line; 4. Make sure the motor does not experience overcurrent. For a water circulation vacuum pump: 1. Open the water supply valve to feed water into the pump; 2. First open the outlet and connect the discharge line; 3. Start the motor; 5. Open the inlet, while also closing the discharge line; 6. Ensure the motor does not experience overcurrent. The backflow valve you mentioned isn’t necessary, as opening the outlet is sufficient; moreover, turning on the backflow valve can be dangerous.
What kind of vacuum pump are you using – a reciprocating pump or a water circulation vacuum pump? Generally, one should first open the outlet and check that the lubricating oil and cooling water are in good condition. For a reciprocating vacuum pump: 1. Open the outlet and connect the discharge line; 2. Start the motor; 3. Open the inlet, while also closing the discharge line; 4. Make sure the motor does not experience overcurrent. For a water circulation vacuum pump: 1. Open the water supply valve to feed water into the pump; 2. First open the outlet and connect the discharge line; 3. Start the motor; 5. Open the inlet, while also closing the discharge line; 6. Ensure the motor does not experience overcurrent. The backflow valve you mentioned isn’t necessary, as opening the outlet is sufficient; moreover, turning on the backflow valve can be dangerous.
Our factory uses reciprocating type machines, but there is no auxiliary line installed. Are there any safety issues? (The vacuum pump is used for PSA decarburization and hydrogen extraction.) Currently, only a backflow valve is available. Please advise
To start a reciprocating vacuum pump: 1. Open the outlet valve. 2. Open the bypass valve. 3. Close the inlet valve. 4. Start the motor. 5. Open the inlet valve. 6. Close the bypass valve