【Q&A Question 168】October 5, 2016

For exhaust, first activate the backup filter, then remove the currently in use filter. Ensure lubricant flow to prevent low-flow interlock devices

Open the connection valve to allow oil to flow into the spare filter; when oil is seen flowing through the window at the top of the filter, it indicates that all air has been removed. Move the three-way valve so that the indicator screw points toward the filter that is to be in use, thereby completing the switch of filters, and then close the connection valve.

1) Inspect the spare filter before cutting. 2) Close the drain valve and open the vent valve. 3) Slowly open the oil filling connection valve and fill the spare filter with oil at a low flow rate, paying attention to the sight glass of the vent valve. 4) When oil is flowing through the sight glass, close the vent valve and the oil filling connection valve. 5) Slowly turn the switching handle to the spare filter, paying attention to changes in oil pressure and ensuring that the valve is in place. 6) Slowly drain the oil from the filter that is no longer in use and monitor the oil pressure before proceeding with maintenance. Pay special attention to changes in oil pressure during switching; the switch valve must be moved into position.

First, cut off the lubricating oil feed link. Slowly open the pressure relief valve of the backup filter, then slowly open the inlet valve of the filter. Once the filter is filled with liquid, close the pressure relief valve. Slowly open the outlet valve of the filter to remove the previously in use filter. After the oil pressure stabilizes, activate the interlock system; open the pressure relief valve and the drain valve of the original filter to release the liquid. Once all liquid has been drained, hand it over to the maintenance team for further processing

Open the connection valve to allow oil to flow into the spare filter; when oil is seen flowing through the viewing window at the top of the filter, it indicates that all air has been removed. Move the three-way valve so that the indicator screw points toward the filter that is to be in use, thereby completing the switch of filters, and then close the connection valve

For reciprocator 1, open the top drain valve of the spare filter, slowly open the connection valve of the filter to fill the spare filter with oil, and once oil is visible at the top of the spare filter, close the drain valve. 2. Rotate the switch handle firmly to change the filter, then close the connection valve. For centrifuge 1, open the valve at the top of the spare filter that leads to the oil tank, and slowly open the connection valve of the filter to fill the spare filter with oil. 2. Once oil is visible in the sight glass of the oil tank, close the valve leading to the oil tank. 3 Rotate the switch handle to activate the new filter and close the connection valve

1. When the filter pressure difference exceeds 0.03 MPa, the filter should be replaced. 2. The operator shall shut off the compressor oil supply via interlock. 3. Start the auxiliary oil pump manually. 4. Slowly switch to the auxiliary oil pump. 5. After the switching is complete, stop the auxiliary oil pump manually and activate the oil pressure interlock.

1) Inspect the spare filter before cutting. 2) Close the drain valve and open the vent valve. 3) Slowly open the oil filling connection valve and fill the spare filter with oil at a low flow rate, paying attention to the sight glass of the vent valve. 4) When oil is flowing through the sight glass, close the vent valve and the oil filling connection valve. 5) Slowly turn the switching handle to the spare filter, paying attention to changes in oil pressure and ensuring that the valve is in place. 6) Slowly drain the oil from the filter that is no longer in use and monitor the oil pressure before proceeding with maintenance. Pay special attention to changes in oil pressure during switching; the switch valve must be moved into position.

1. When the differential pressure of the lubricating oil filter reaches 0.15 MPa, an alarm is issued in the control room, and the filter is switched on-site. 2. Check whether the shut-off valve on the bypass pipeline between the two filters is already open; if not, slowly open it fully ； 3. Open the shut-off valve on the exhaust pipeline of the spare filter; when oil is seen flowing into the fuel tank through the oil return sight glass on that pipeline, it indicates that the spare filter is filled with oil, at which point the shut-off valve on the bypass pipeline should be closed. 4. Rotate the control lever of the dual-port three-way valve to switch the filter whose filter element needs to be replaced to spare mode. 5. Open the exhaust valve of the disabled filter to relieve pressure ； 6. After confirming that the pressure in the filter has been released following the switch, ensure that no oil flows out of the exhaust pipe; then open the drain to remove all the oil, and proceed with replacing the filter element ； 7. After cleaning or maintenance, close the discharge valve of the filter, and open the stop valve on the bypass line to check for leaks. If any leaks are found, relieve the pressure promptly; if no leaks are present, then open the stop valve on the exhaust line to allow oil to fill the filter and flow through it. At this point, the filter enters standby mode.