Difference between differential pressure gauge and pressure gauge and installation specifications
1. The difference between a differential pressure gauge and a pressure gauge-the difference in use is: the differential pressure gauge measures the pressure difference between two points, and tests the pressure difference between adjacent clean areas of different levels and between the clean room and the outdoor. The pressure gauge measures the pressure difference between this point and the atmospheric pressure of the installation site (note: the altitude of the installation site is different, then its atmospheric pressure value is different).
Pressure gauge 2. The difference between a differential pressure gauge and a pressure gauge---Different installation environments. Differential pressure gauges are usually installed in places where the pressure at both ends need to be detected (for example: pipeline valves, inlet and outlet of pipeline filters). Pressure gauges are usually installed Where the pressure needs to be detected, prompt whether the pressure value is appropriate.
3. The difference between a differential pressure gauge and a pressure gauge---the structural principle is different.
(1) One port of the pressure gauge should be connected to the pipe under test.
Pressure gauges can be found in almost all industrial processes and scientific research fields. They can be found everywhere in heating pipe networks, oil and gas transmission, water and gas supply systems, vehicle repair and maintenance factories, and pressure gauges. There are many types of pressure gauges. General (ordinary) pointer indication type, as well as digital type, not only conventional type, but also special type, not only contact type, but also remote transmission type...
(2) Both ports of the differential pressure gauge must be connected to the pipe under test respectively.
Differential pressure gauge is a pressure measuring instrument that measures the pressure difference between two different points. In addition to measuring the pressure difference, it is mostly used with throttling devices (such as orifice plates, venturi tubes, etc.) to measure the flow of fluids. It is also a shock-resistant pressure gauge. It can be used to measure the resistance of pipelines (such as differential pressure level gauges) and tower equipment (ie pressure drop at two points), etc. There are many types of differential pressure gauges. In addition to simple U-tube differential pressure gauges, commonly used ones are Float type differential pressure gauge, double bell type differential pressure gauge, ring scale type differential pressure gauge, etc., can be widely used in electronics, pharmaceuticals, biotechnology, aerospace and other production, scientific research departments, pharmaceutical companies and quality supervision departments implement GMP An ideal instrument for standardizing and strengthening production environment management.
The installation specifications of the anti-seismic pressure gauge are confirmed.
1. Install a pressure gauge with water vapor or medium temperature over 60 degrees on site. In order to prevent overheating and damaging the instrument components, a ring or U-shaped elbow should be added between the pressure point and the pressure gauge valve. The valve installation position in this figure is Some automatic control installation catalogs are different. The installation catalog installs the valve at the root (red dot). The valve is at a high temperature and is easy to leak and damage. If the valve is installed according to Figure 1, the valve is at a normal temperature, which greatly extends the valve. The life span of the electric contact pressure gauge is proved by our practice for many years.
2. When measuring the pulsating pressure at the outlet of the compressor or pump, in order to protect the pressure gauge and make the measurement accurate, a buffer or throttle can be installed in front of the pressure gauge. If necessary, a damping valve can be installed to increase the pressure when the pressure changes. Resistance to the pressure gauge.
When the measuring medium contains dust, particles or impurities, the pressure pipe should be thickened. If necessary, a dust collector or a sewage valve should be installed to facilitate the cleaning of the pressure pipe. For wet gas stainless steel pressure gauges, a water separator should be installed.
3. The distance between the pressure gauge and the pressure point should be as short as possible. In order to avoid measurement lag, the pressure tube should not exceed 50 meters if it is too long. If it is too long, consider using a remote transmission pressure gauge. The media should be fitted with a flexible joint for the purpose of dismantling and blocking in the future.
When installing a low-pressure pressure gauge, try to avoid the influence of the static pressure caused by the liquid column on the instrument measurement. For the pressure measurement of key equipment, two pressure gauges can be installed separately to prevent accidents.
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