Adding a return pipeline to a high-pressure injection pump – how to reduce pipeline vibration
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For high-pressure injection pumps that have a return line (running from the pump outlet back to the pump inlet), how can pipeline vibration be reduced and valve operability improved (it is difficult to open the valves when the pressure difference across them is too large)? I hope the experts here can give me some advice!
The stop valves before and after the throttle valve should be closed to gradually reduce the pressure in the pipeline. Pressure gauges can also be installed before and after the throttle valve; once the valves are adjusted to the appropriate positions, the pipeline vibration is reduced to an acceptable level, which can then be used as a control parameter.
Previously, three stop valves were installed; due to the large pressure difference before and after the valves, it was difficult to operate them, and the pipelines experienced significant vibration. The issue improved after replacing the fuel injector, but the root problem remained unchanged.
Add a throttle orifice plate after the first shut-off valve, provided that the flow requirements are met.
8-inch outlet wire, 2-inch return wire. It’s a huge difference, right? Would it be better if it were 4 inches in diameter? ?