Intelligent pressure calibrator processing method and cause of failure
1. Reversing valve commutation is not in place, resulting in leakage.
2. Positive pressure check valve or negative pressure check valve is not reset after movement, causing air pressure phenomenon.
Approach:
1. The spring tilts badly and the one-way valve core does not slide freely.
2. Check whether the positive pressure and negative pressure check valve seat holes have not reached the requirements.
3. The reversing valve must be commutated into position and the reversing valve stem cannot be suspended in midair.
Second, the hydraulic pressure instability or normal pressure reasons:
1. Insufficient oil in the tank.
2. There is a leak in the piping joint at the time of transportation.
3. The quick connector "â—‹" ring seal is damaged.
4. The air in the system is more or less clean.
Approach:
1. Tighten the pipe fittings.
2. Replace the "â—‹" ring.
3. Loosen the fuel tank cap or add fuel to the tank.
4. Repeatedly priming the pump so that the air in the system drains out of the tank.
Treatment method: According to the actual local atmospheric pressure, it should be judged whether the instrument is normal pressure or not, and the pressure pump has a feeling of air pressure.
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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