Installation and Use of Diaphragm Pressure Gauges and the Role of Elbows

Ⅰ. The maximum performance of the diaphragm pressure gauge lies in the correct installation and use

Diaphragm pressure gauges are different from ordinary pressure gauges. The performance of ordinary pressure gauges has been greatly improved. At present, diaphragm pressure gauges are more and more widely used, which can meet the needs of different industries. However, in order to give full play to the maximum performance of the diaphragm pressure gauge, we should pay more attention to the installation and use of the diaphragm pressure gauge.

1. When installing the diaphragm pressure gauge, it should be installed in a place that is easy to clean and observe, so that the diaphragm pressure gauge can be protected from vibration and high temperature environment. In addition, the diaphragm pressure gauge is best installed in a sunny place. When installing the pressure gauge, it should be installed independently and not connected with other pipes.

2. If the pressure gauge is installed on the drum, there should be a trap between it and the drum, and a three-way cock should be installed between the trap and the pressure gauge. After the water trap is completed, the inner diameter shall not be less than 10mm. When installing the three-way cock, it is best to install it in a place where it is convenient to flush the water storage elbow, which is convenient for disassembly and maintenance.

3. The installation and maintenance of pressure gauges should comply with relevant standards. Before installation, the pressure gauge should be thoroughly taught and researched, and the working pressure should be indicated on the dial. After the diaphragm pressure gauge is installed, it should be calibrated every six months to ensure the quality of the pressure gauge.

Ⅱ. What is the function of the elbow in the diaphragm pressure gauge?

Generally, before installing a diaphragm pressure gauge, an elbow is added to it. Many people may not know why they are doing this, so sometimes this step is ignored. This will lead to failures in future use, so we think that everyone must first figure out why the elbow is added to the diaphragm pressure gauge.

Ordinary diaphragm pressure gauges play a condensation role when detecting steam plus gauge bending, preventing steam from directly entering the diaphragm pressure gauge and affecting the accuracy of the diaphragm pressure gauge. This kind of table bend is generally called a condensation ring or a condensation bend.

1. Cooling, shock absorption, buffering, isolation;

2. Anti-blocking;

3. Buffer the pulse pressure.

When measuring steam pressure, the diaphragm pressure gauge should be equipped with a pressure gauge elbow (condensation) to prevent the high temperature steam from directly contacting the load cell and being affected by the high temperature, thereby affecting the measurement accuracy. There will be some pressure fluctuations in general operating systems.

However, these fluctuations should not be reflected on the diaphragm pressure gauge, otherwise it may affect the gauge reading, so adding the elbow will not only play a certain buffering effect, but also protect the diaphragm pressure gauge from being degraded by frequent unnecessary fluctuations service life. This is why the diaphragm pressure gauge bends.