As specialists in pressure gauges and valves for various industrial areas, we know that refrigeration tools have undergone important changes, adapting to technological advances and integrating digital functions that simplify the processes of the production chain. Among them we can count the automatic calculation of data, sub cooling and overheating, so there are many notions that need to be analyzed to understand their usefulness.
But, before getting into the subject, it is necessary to clarify that the refrigeration pressure gauge is a term that responds to an indispensable pressure gauge in cooling systems, industrial freezing and even in cold coal filling equipment. It has a structure that is similar to that of the common manometer, but with specific characteristics for its operation at low temperatures. In fact, a special type of welding is used and is subjected to tests aimed at preventing leaks.
There are, however, frequent doubts as to whether a digital pressure gauge is more suitable or more fragile than an analog one. In reality, this depends on many factors, such as the manufacturer's quality control processes. Some pressure gauges in Shanghai incorporate protectors to ensure greater resistance, so if you are going to compare, it is advisable that you look for an instrument that has a solid structure, made from proven effective raw materials, such as ABS, BA or TPE.
WHY BUY A DIGITAL PRESSURE GAUGE?
- Multiple measurement and automated calculations. To monitor the cooling systems, it is always necessary to know the subcooling value and the superheat value, because this criterion helps to understand how the equipment works or what they should look at the time of revision; for example, a low subcooling would indicate that there is little refrigerant gas. In analogue manometers it would be necessary to measure the pressure, take the temperature and go to the gas table to determine if there is any variation; while digital instruments are designed to carry out all these processes simultaneously.
- Compatible refrigerants. The most common is that not all the refrigerant gases are used in an analog manometer, but only the necessary one is acquired and under the manufacturer's considerations. However, digital cooling devices can have more than three scan gases, which are usually already pre-charged, so they just need to select the working refrigerant.
- The most modern gauges and valves are designed to encompass many criteria in a single tool, saving time and money in the production chain. Thanks to these digital equipments it is possible to measure in an automated way the pressure drops , the compressor current and the vacuum.
- The digital equipment has the necessary technology to issue a report with the operating graphs. There are some models that even generate a table or file and send it to the computer, due to the fact that they have software that simplifies all the measurement and data recording processes.
- Refrigerant update. Some of the newest pressure measurement instruments are designed to respond to hard work, so they are functional tools that update the refrigerant gases that leave by means of a digital tool or computer software. This means they can update their criteria, without the need to invest in a new pressure gauge.
HOW ARE REFRIGERATION PRESSURE GAUGES USED?
The correct use of pressure gauges is one of the aspects that most generates doubts. It must be taken into account that these are unavoidable devices to determine the pressure exerted by certain fluids, especially the aggressive flows of some product within the industry, such as the expulsion of liquids and gases. Therefore, the system operators must know the ways to read the refrigeration pressure gauges for the safety of the company and the workers, as well as for the optimization of resources.
- These devices are composed of iron and copper, although they can also be protected by a red or blue coating. They are also known as Freon pressure gauges and there are certain characteristics that distinguish them from other pressure gauges and valves . For example, those that are blue are used to know the pressure or absorption measurement of the compressors.
- The scale should read like this: from 0, atmospheric pressure is measured; while, from 0 downwards, both the vacuum and the variations below atmospheric pressure are controlled. In air conditioning equipment and industrial refrigeration systems, the red pressure gauge is used to reveal when the pressure is negative; in this way, the condition of the compressor is also verified.
- Refrigeration pressure gauges incorporate hoses of different colors that serve different purposes. The red one, for example, is in charge of connecting with the valve, in order to facilitate the discharge of the compressor. The blue one associates the compressor absorption valve with the low pressure gauge; and the yellow is the most versatile, since it is capable of measuring and managing very precise controls.
- The refrigeration pressure gauge should only be used taking into account specific parameters by trained and responsible personnel who take into account all safety measures, in case of incidents. It is necessary that they comply with all the steps to carry out a reading, without rushing and respecting the times, the order of the plant and the production chain in general.
- When removing the translucent cap and collecting it, they must be very careful; also, never touch the pointer or any other element beyond the screw. Once you have done the graduation, set the pressure gauge when the cooling system is on, as this will achieve a lower pressure, making it easier and safer to obtain reliable measurements.
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We are a company specialized in pressure gauges and valves for industrial measurement processes. We have a long history in the market and, we have distinguished ourselves by the quality of attention in the commercialization of various instrumentation, control and regulation products. If you want more information, you can contact us through the email sales@jyinstruments.com