What should I do if the pointer of shockproof pressure gauge falls off?

There are two types of "needle drop" of pressure gauge: one is that the needle drop is found after the instrument arrives or before use; Second, the instrument pointer falls off in use.

In either case, the needle drop problem of the pressure gauge should be one of the most serious (important) faults in the instrument (although it is easier to repair), because once the instrument pointer falls off, it loses the pressure indication function, that is, the pressure gauge loses its most basic use function, which is unacceptable to any user.

Reasons for the pointer falling off of shockproof pressure gauge:

(1) after instrument calibration, no nail needle or nail needle is not firm;

(2) improper handling in instrument transportation, vibration will shake off the pointer.

Generally, there are the following reasons why the pointer of the instrument falls off in use:

(1) after instrument calibration, no nail needle or nail needle is not firm:

(2) The taper of the hole in the needle magazine is inconsistent with the taper of the central axis of the movement, which causes the pin to be not firm;

③ The needle magazine and needle piece are not riveted firmly, and the needle piece and needle magazine are separated due to vibration or impact;

(4) the instrument pressure relief is too fast, and the pointer repeatedly and violently hits the nail stop plate, causing the pointer to fall off;

⑤ The working environment of the instrument has a large amplitude and high frequency, and long-term work causes the pointer to fall off.

What should I do if the pointer of shockproof pressure gauge falls off?

Just to be on the safe side, it should be replaced directly. If it needs to be repaired, it needs to be checked and certified.

Eight aspects of stainless steel pressure gauge selection

First, the dial diameter of stainless steel pressure gauge:

The dial diameter of stainless steel pressure gauge is the diameter of the shell of the pressure gauge by default, which is commonly used: 50mm,60mm,100mm and 150 mm.

Second, the shell material of stainless steel pressure gauge:

The shell material of stainless steel pressure gauge will be 304 stainless steel and 316L stainless steel, so we should choose the shell material of pressure gauge according to the specific environment. If the environment has great influence, we can choose diaphragm pressure gauge.

Third, the installation method of stainless steel pressure gauge:

The installation methods of stainless steel pressure gauges can be divided into two types: axial (back connection) and radial (bottom connection), but in reality, customers can choose the installation method according to the actual situation. If it is panel installation, the axial direction can choose the front flange edge or the rear fixed bracket, and the radial direction can choose the front flange edge or the rear fixed edge.

Fourth, the measuring medium of stainless steel pressure gauge:

The liquid contact material of stainless steel pressure gauge is only stainless steel, namely 304 stainless steel and 316 stainless steel.

Fifth, liquid filling of stainless steel pressure gauge:

We found that many pressure gauges are filled with liquids in some environments with relatively large mechanical vibration. In fact, the main function of these liquids is to increase the resistance and effectively prevent the pointer of the pressure gauge from constantly vibrating, so that we can read the pressure value accurately. Generally, it is commonly used near the pump or in the environment with relatively strong vibration.

Sixth, the medium temperature of stainless steel pressure gauge:

Generally, the measuring medium temperature of copper alloy measuring elements is +80 degrees, and that of stainless steel is +200 degrees. However, if the pressure gauge you choose is a liquid-filled shock-resistant pressure gauge, the highest temperature of the medium at this time can only reach +100 degrees; If the temperature is too high, but it must be earthquake-resistant, the way we adopt is condensation bend.

Seventh, the measuring range of stainless steel pressure gauge:

Because the pressure gauge displays the pressure value by measuring the deformation of the element and driving the pointer to rotate through the amplification mechanism, we

should also pay attention when selecting the measuring range. Generally, the maximum pressure measured is 3/4 or 2/3 of the measuring range of the pressure gauge. If the pressure is large, the pointer changes little, and the read pressure value will be inaccurate. If it is small, the pressure gauge will be damaged due to overload.

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