Briefly describe the common fault causes and treatment methods of pressure switches

1. Fault phenomenon:

The pressure switch has no output signal. Cause analysis: (1) The micro switch is damaged. (2) The switch setting value is too high. (3) The wire contact that is connected to the micro switch is not connected. (4) The pressure sensitive part is not properly assembled. There is a stuck phenomenon (5) Damage to the pressure sensitive component: (1) Replace the micro switch (2) to adjust to the appropriate setting value (3) Reconnect to make the contact good (4) Reassemble, make the action sensitive ( 5) Replace the pressure sensitive component

2. Failure phenomenon:

Reasons for poor sensitivity of pressure switch (1) Poor assembly/transmission mechanism (rod or plunger, etc.) excessive friction (2) Micro-switch contact stroke is too long (3) Adjustment screw, ejector pin, etc. are not properly adjusted (4) Improper installation, such as uneven and inclined installation solutions: (1) re-assembly, make the action sensitive (2) reasonable adjustment of the micro-switch contact stroke (3) reasonable adjustment of the nail and ram position (4) to vertical or horizontal installation .

3. Fault phenomenon:

Pressure switch signal is too fast Cause analysis: (1) large oil inlet orifice (2) isolation diaphragm fragmentation (3) system impact pressure is too large (4) electrical system design has a wrong solution (1) appropriate orifice Change to small, or add a damper tube on the control line (2) replace the isolation diaphragm (3) add a damper tube on the control line to reduce the impact pressure (4) design the electrical system according to the process requirements.