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How to fix a Selenoid valve problem?
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The fault persisted even after replacing the dedicated switching power supply.
Fault Symptoms: One week after replacing a Bosch Rexroth hydraulic proportional valve, intermittent issues arose where the valve would fail to open, or—once fully open—fail to close.
Troubleshooting Process: Power supply checked first; measurements showed the voltage dropped to 18.3V during valve operation. Although installing a dedicated 24V switching power supply eliminated the voltage drop, the fault remained. Attempts to adjust the valve-opening program parameters resulted in a situation where multiple adjustments were required to achieve the correct position.
Current Status: Neither power supply replacement nor parameter adjustments fully resolved the issue; the user is seeking solutions from peers.
The root cause was ultimately identified as poor contact in the relay contacts controlling the two valve-locking coils beneath the hydraulic proportional valve.
Timeline
Fault Emergence: The newly replaced hydraulic proportional valve intermittently fails to open or close. 00:04
Power Supply Check: Measured 21.5V at the electrical cabinet, dropping to 18.3V during operation; insufficient voltage suspected. 01:09
Power Supply Replacement: Installed a dedicated switching power supply; voltage stabilized at 24V with no drop. 01:25
Fault Unresolved: Proportional valve continued to malfunction occasionally after the power supply change; power supply issues ruled out. 01:41
Parameter Adjustment: Attempted to increase the initial valve-opening parameters; observed that multiple adjustments were required to reach the correct position. 02:22
Paycnc offers all kinds of Selenoid valves.
If you could not find the exact model, you can send item photos and its nameplate to paycnc@paycnc.com to get quotation.
WhatsApp: https://wa.me/+8613925042139
#Selenoid #valves
The fault persisted even after replacing the dedicated switching power supply.
Fault Symptoms: One week after replacing a Bosch Rexroth hydraulic proportional valve, intermittent issues arose where the valve would fail to open, or—once fully open—fail to close.
Troubleshooting Process: Power supply checked first; measurements showed the voltage dropped to 18.3V during valve operation. Although installing a dedicated 24V switching power supply eliminated the voltage drop, the fault remained. Attempts to adjust the valve-opening program parameters resulted in a situation where multiple adjustments were required to achieve the correct position.
Current Status: Neither power supply replacement nor parameter adjustments fully resolved the issue; the user is seeking solutions from peers.
The root cause was ultimately identified as poor contact in the relay contacts controlling the two valve-locking coils beneath the hydraulic proportional valve.
Timeline
Fault Emergence: The newly replaced hydraulic proportional valve intermittently fails to open or close. 00:04
Power Supply Check: Measured 21.5V at the electrical cabinet, dropping to 18.3V during operation; insufficient voltage suspected. 01:09
Power Supply Replacement: Installed a dedicated switching power supply; voltage stabilized at 24V with no drop. 01:25
Fault Unresolved: Proportional valve continued to malfunction occasionally after the power supply change; power supply issues ruled out. 01:41
Parameter Adjustment: Attempted to increase the initial valve-opening parameters; observed that multiple adjustments were required to reach the correct position. 02:22
Paycnc offers all kinds of Selenoid valves.
If you could not find the exact model, you can send item photos and its nameplate to paycnc@paycnc.com to get quotation.
WhatsApp: https://wa.me/+8613925042139
#Selenoid #valves
