careythibodeau
Member
Hey all,
I wanted to discuss an issue with achieving a constant flow rate of around 10 GPM on a glycol circulation pumps in a 1200-1300 PSI system. I have been experiencing pump failures and are unable to maintain a stable flow rate, which fluctuates between 1-3 GPM. Despite my attempts to adjust the control loop's PID settings, I haven't been able to find the ideal configuration due to mechanical breakdown and wear and tear of the PD pumps. They are constantly swapping the pumps out, a fresh pump runs around 20-28 Hz.
Currently, we are using 480V Powerflex 753 drives in Normal Duty 34 Amp cat# 20F11ND034AA0NNNNN. These drives are powering 460V, 29.5 Amp, 1765 RPM, Inverter Duty Motors (you can find more details about the motors here: [https://www.weg.net/catalog/weg/US/...-50-Hz-IC411---TEFC---Foot-mounted/p/12424790]). These motors are connected to smaller Rotor-Tech Positive displacement gear pumps (refer to the manual for Model GS 3312 EP).
In light of the situation, I see two possible options: either replacing the pump with a smaller size or up-sizing the drive and utilizing HD mode to accommodate the gear pumps. I have also included a communication I sent to operations expressing my belief that the current pump might be undersized. Operations wants us to further investigate if up-sizing the drives will resolve their issues.
Anyone got any tricks up their sleeve?! Thanks in Advance!
I wanted to discuss an issue with achieving a constant flow rate of around 10 GPM on a glycol circulation pumps in a 1200-1300 PSI system. I have been experiencing pump failures and are unable to maintain a stable flow rate, which fluctuates between 1-3 GPM. Despite my attempts to adjust the control loop's PID settings, I haven't been able to find the ideal configuration due to mechanical breakdown and wear and tear of the PD pumps. They are constantly swapping the pumps out, a fresh pump runs around 20-28 Hz.
Currently, we are using 480V Powerflex 753 drives in Normal Duty 34 Amp cat# 20F11ND034AA0NNNNN. These drives are powering 460V, 29.5 Amp, 1765 RPM, Inverter Duty Motors (you can find more details about the motors here: [https://www.weg.net/catalog/weg/US/...-50-Hz-IC411---TEFC---Foot-mounted/p/12424790]). These motors are connected to smaller Rotor-Tech Positive displacement gear pumps (refer to the manual for Model GS 3312 EP).
In light of the situation, I see two possible options: either replacing the pump with a smaller size or up-sizing the drive and utilizing HD mode to accommodate the gear pumps. I have also included a communication I sent to operations expressing my belief that the current pump might be undersized. Operations wants us to further investigate if up-sizing the drives will resolve their issues.
Anyone got any tricks up their sleeve?! Thanks in Advance!