Anhui Star Control Instrument Co., Ltd.

Anhui Star Control Instrument Co., Ltd.

Pressure gauge structure and selection

The structure of the pressure gauge:
Overflow hole: In the event of an emergency in which the Bourdon tube bursts, the internal pressure will be released to the outside through the overflow hole to prevent the glass panel from bursting. Note: In order to maintain the normal performance of the overflow hole, please leave at least 10mm behind the table, do not modify or plug the overflow hole.
Pointer: In addition to the standard pointer, other pointers are also optional. (Zero pointer zui large value pointer or set pointer) Please list in the selection table.
Glass panel: In addition to standard glass, other special materials such as tempered glass and non-reflective glass are also available.
Performance classification: normal type (standard), ordinary type (M) for steam, heat-resistant type (H), vibration-resistant type (V), vibration-resistant type (MV) for steam, heat-resistant type (HV).
Treatment: Oil-free/water-free treatment Remove water or oil remaining in the wetted parts during manufacture.
Exterior designation: Housing color Please specify unless otherwise specified.
Throttle: (optional) To reduce the pulsation pressure, the throttle is installed at the pressure inlet.
Pulsating pressure: Due to the pulsating characteristics of the pump in the generator, the amplitude of the special diagnosis curve of the pressure gauge is large. This is very harmful to the pressure gauge.
Precautions for pressure gauge selection:
1 Instrument name: It should be clear that it is a general pressure gauge, an oxygen pressure gauge, an electric contact pressure gauge, an ammonia pressure gauge, etc.;
2 meter model: different models for different manufacturers, but must be clearly written in the contract;
Accuracy level: 1.0; 1.6; 2.5; 4.0
The outer diameter of the meter: Φ40, Φ60, Φ100, Φ150, Φ200, Φ250.
5. Installation method: radial, axial, with front and rear.
6. Measurement range: vacuum gauge - -0.1MPa
pressure gauge - upper limit of measurement pressure vacuum - measuring range
7. Connector thread: M10X1; M14X1.5; M20X1.5
In special cases, the following points should also be specified according to different pressure gauges:
1. Instrument name: diaphragm pressure gauge, anti-corrosion pressure gauge, shockproof pressure gauge, bellows pressure gauge, etc.
2. For diaphragm pressure gauge:
a. According to different purposes, it should be clear that the filling liquid in the spring tube (silicone oil, glycerin, edible oil, fluorine oil, etc.)
b. According to the corrosion condition of the tested medium, the material of the diaphragm should be clarified (such as SUS316, bismuth, titanium, Monel, Hastelloy, coating, etc.)
c. If flange connection, the flange implementation standard, size, material, etc.
3. For the seismic pressure gauge, the damping fluid (silicone oil, glycerin, etc.) in the case should be clearly defined.
4. The anti-corrosion pressure gauge should be based on the corrosiveness of the tested medium or the corrosiveness of the working environment, and the materials of the joints, spring tubes and case.
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