A few questions about control?

Thread Content

1. For negative-pressure equipment used for feeding, which draws in materials from tanks at atmospheric pressure through its own vacuum – what are the control methods and configurations required to achieve a stable metered feeding rate? The feed amount should be accumulable and resettable, and it should be visible on the PLC interface. Either volumetric flow rate or mass flow rate is acceptable ； 2. Feeding into the negative-pressure equipment: The material is pumped from the atmospheric-pressure tank to the negative-pressure equipment using a material pump. What are the control methods and configurations for achieving a stable metered feeding rate? The feed amount should be accumulable and resettable, and it should be visible on the PLC interface. Either volumetric flow rate or mass flow rate is acceptable ； 3. The product from the negative-pressure equipment is transferred to a tank at atmospheric pressure; it is required that this transfer be carried out into the tank via a pump without removing the vacuum. What is the control method and configuration needed to ensure a stable feeding rate? The feed amount should be accumulable and resettable, and it should be visible on the PLC interface. Either volumetric flow rate or mass flow rate is acceptable ； 4. For discharging material from a vacuum device to another vacuum device, it is required that the vacuum level of each device be maintained without being reduced; material is pumped out of the tank under such vacuum conditions. What is the control method and configuration needed to ensure a stable feeding rate? The feed amount should be accumulable and resettable, and it should be visible on the PLC interface. Either volumetric flow rate or mass flow rate is acceptable ；