Reasons: a oil pump impeller clearance check, repair the oil pump. b vacuum table damaged replacement. c Vacuum indicates high value (4Mpa) The suction pipe partially obstructs the cleaning filter and cleans the suction pipe. d The suction pipe is partially sealed and tightly sealed. 2 The gauge has no value (or lower). The reason: a part of the outlet pipe is not tightly sealed so that the seal is tight. b The gauge is damaged and replaced. c Oil pump malfunction / Correct use according to oil pump instruction manual. 3 Power box abnormal sound. Reasons: a car's air pressure is not enough, the power box is not hung up on the air-powered power box will be sufficient gas, so that the barometer reading to 0.3Mpa above. b. The air path is not sealed tightly, and the power box is not hung up to make the seal tight. c The air chamber was damaged, and the power box was not hung up to repair the air chamber. d Too little oil in the power take-off box or with oil or foreign oil.
Tube sheet are usually made of a round flat plate with holes drilled into the plate to accommodate tubes in the exact location and pattern relative to each other. The tube sheet is used to support and isolate the tubes in the Shell And Tube Heat Exchanger.
A tube sheet is a plate used to support a tube in a shell and tube heat exchanger. The tubes are aligned in a parallel manner and are supported and held in place by the tube plate. A tube sheet is a round plate with holes in it so that the tube can fit through the opening. Tubes are usually made of round, flat metal sheets. Drill holes for pipe ends in precise locations and patterns relative to each other. The tube plate is made of the same range of materials as the pipe.
These are usually made of mild steel and vary in thickness according to fluid pressure. Depending on the final application (petrochemical, nuclear, oil and gas, etc.), the tubes can be clad in stainless steel or other superalloys, or even made entirely of stainless steel or superalloys.
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Various fault detection methods for refueling vehicles
1. Vacuum indicates low or no indication.