What's the difference between diaphragm pressure gauge and diaphragm pressure gauge?

Diaphragm pressure gauge: a diaphragm gauge composed of diaphragm isolator and general pressure instrument. The connection modes of diaphragm pressure gauge and equipment mainly include threaded connection, flange connection and sanitary clamp type. The meter is suitable for measuring the pressure of the medium with strong corrosion, high temperature, high viscosity, easy crystallization, easy solidification and solid floating matter, and it is necessary to avoid the measuring medium from directly entering the general pressure instrument, prevent the accumulation of sediments and be easy to clean.

Diaphragm pressure gauge: It is suitable for measuring the pressure of liquid, gas or steam which has no explosion danger, crystallization, solidification and high viscosity, but has no corrosive effect on copper and copper alloys.

diaphragm manometer

1. Different working principles:

Diaphragm pressure gauge: When the diaphragm pressure gauge is used for pressure measurement, the measuring medium will directly act on the isolation diaphragm, and generate upward pressure perpendicular to the diaphragm, so that the diaphragm will deform, and the deformation will occupy the space and urge the filling liquid in the spring tube to transfer the medium pressure to the spring tube, so that the end of the spring tube will be elastically deformed, and the gear shaft of the movement will be driven to rotate by the linkage mechanism, so that the pointer can indicate the measured pressure value on the dial.

Diaphragm pressure gauge: Under the action of pressure, the working medium to be measured directly acts on the elastic diaphragm, and the diaphragm elastically deforms upward (measuring positive pressure) or downward (measuring negative pressure), and the gear shaft of the movement is driven to rotate by the connecting rod mechanism fixed in the center of the diaphragm, so that the pointer indicates the measured pressure value on the dial.

2. Different elastic elements

Diaphragm pressure gauge: the elastic element is a spring tube, and the diaphragm only plays an isolation role.

Diaphragm pressure gauge: The elastic element of diaphragm pressure gauge is corrugated diaphragm. The measured pressure acts on the diaphragm, which generates upward (or downward) elastic deformation, and the pressure value is indicated by the connecting rod mechanism welded on the diaphragm.

3, the accuracy level is different

Diaphragm pressure gauge: the general accuracy grade is 1 and 6.

Diaphragm pressure gauge: accuracy grade is 2 or 5.

Possible faults of pressure gauge

The pressure gauge manufacturer introduces the possible faults of pressure gauge to you.

Failure of stainless steel shock-resistant meter

1. The sector gear of pressure gauge will wear after working for a period of time;

2. The pressure measuring system of the pressure gauge is impacted by the instantaneous overpressure of the measured medium, so that the pointer can't return to zero or rush below the limit nail;

3, instrument pointer, after the system pressure relief does not return to zero.

Stainless steel earthquake-resistant table

Maintenance method of pressure gauge

1. After a period of use and compression, some deformation and wear will inevitably occur in the movement of the pressure gauge, and various errors and faults will occur in the pressure gauge. In order to ensure its original accuracy without distorting the value transmission, it should be replaced in time to ensure that the instructions are correct, safe and reliable.

2. The pressure gauge should be cleaned regularly. Because the inside of the pressure gauge is not clean, it will increase the wear and tear of various parts, thus affecting its normal work, which will seriously make the diaphragm pressure gauge malfunction and scrap.

3. According to JJG52-1999, the calibration period of the pressure gauge installed at the pressure measuring part is generally less than half a year. For pressure gauges related to production safety and environmental monitoring, the verification period must be in accordance with the verification regulations and can only be less than half a year; If the industrial and mining conditions are bad, the verification period must be shorter.

4. If the medium at the pressure measuring part fluctuates greatly, is frequently used, requires high accuracy and has strict requirements on safety factors, the verification period can be shortened appropriately according to the specific situation.

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