For heating during polymerization, should the hot water pump be turned on first and then the valve, or should the valve be opened first and then the hot water pump?
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Regarding the temperature increase during polymer feeding, should the hot water pump be turned on first and then the valve, or should the valve be opened first and then the hot water pump? Please explain. Thank you.
Turn on the hot water pump first, then open the valve! Isn’t that the case with all centrifugal pumps?
1. One should first open the valve to fill the pipeline with water, and then start the hot water pump; this helps to prevent excessive vibration in the pipes due to too many bends at the outlet. 2. When starting a pump on-site, we first open the inlet, start the pump, and then open the outlet; this helps to prevent cavitation or a decrease in flow rate. 3. For computer operation, the valve should be opened first, followed by starting the pump. Choose some pumps based on the actual conditions of your door factory
Open the valve first, then start the hot water pump, to avoid excessive pipeline vibration caused by too many elbows and to prevent cavitation or a low flow rate.
First open the inlet valve and start the pump, then open the outlet valve :)
Start the pump first and then open the valve, to prevent the material inside the tank from flowing back when the valve is opened but the pump has not started
According to the characteristic curve of the centrifugal pump, the shaft power is at its minimum when the flow rate is 0; therefore, in order to prevent excessive starting current from damaging the motor, the correct procedure is to first open the inlet valve to start the pump, and then open the outlet valve. Please do not criticize while participating in the discussion
Reply to 1# Honghong Tian: If the outlet valve is too tight, it can be slightly opened a bit in front of the pneumatic pump. After starting up, the outlet valve is opened as required, which is less labor-intensive, but it does not comply with the regulations.
First open the inlet valve and start the pump, then open the outlet valve
If the valve is opened first and then the pump is started, sometimes the pump fails to build pressure or raise the temperature； So I think the pump should be started first, then the valve. I’m not sure if it’s correct; let’s discuss it together.
Reply to 10# Honghong Tian: First, open the inlet valve on-site and start the pump; open the outlet valve slightly. Once pressure builds up, open the valves fully. Reasons for opening the outlet valve slightly: 1. To prevent cavitation; the flow rate cannot increase – the pressure gauge should be monitored on site. 2. The instantaneous current is too high, causing the motor to burn out; reducing the opening of the outlet valve helps to lessen the load on the motor.