The common faults and causes of diaphragm pressure gauge during operation:
First, the pointer jitter.
Causes: 1. The pressure of the measured medium is large; 2. The installation position of the pressure gauge is greatly shaken.
Second, the pressure gauge has no indication.
Causes: 1. The shut-off valve on the pressure guiding pipe is not open; 2. The pressure guiding pipe is blocked; 3. The dirt in the spring pipe joint is excessively deposited and blocked; 4. The spring pipe is cracked; 5. The center tooth and the fan tooth wear Too much to mesh.
Third, the pressure indication error is not uniform.
Causes: 1. The spring tube fails to deform; 2. The free end of the spring tube and the sector gear are adjusted improperly.
Fourth, the pressure gauge pointer jump or sluggish phenomenon.
Causes: 1. The pointer collided with the surface glass or scale; the center gear shaft was bent; 3. The two gears were contaminated; 4. The movable screw between the connecting rod and the fan gear was not flexible.
5. After the pressure is removed, the pointer cannot be restored to zero.
Causes: 1. Pointer bending; 2. Short spring force; 3. Loose hands; 4. Drive gear has friction.
Sixth, the transmission ratio is misaligned.
Seven, the pressure gauge indicates low.
Reasons: 1. Improper gear ratio; 2. Spring tube leaking; 3. Pointer or transmission mechanism has friction; 4. Pressure guiding pipeline leaks.
Eight, the pointer cannot indicate the upper limit scale.
Reasons: 1. Small transmission ratio; 2. Improper positioning of the movement on the base; 3. Improper welding position of the spring tube.
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