Intelligent pressure calibrator processing methods and causes of failure First, the negative pressure can not reach the standard reasons:
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.
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.