The pressure gauges or manometers are instruments for measuring the relative pressure of fluids.
There are numerous types of manometers suitable for different uses and most actually measure a relative pressure, i.e. the difference between the atmospheric pressure at the measurement point and the ambient pressure you want to measure.
The boiler thermomanometer, also called thermohydrometer, on the other hand, is a component through which we can read both the pressure and temperature values, with a similar mechanism, but with two sensitive elements and the possibility of reading both pressure and temperature values on the same display.
The applications of manometers and thermohydrometers on boilers
The boiler is a system that works because it keeps the quantity of water present inside it in constant equilibrium and controls its temperature. In order to check these balances at any time, a display are often installed on the front of the boiler to read the internal pressure and temperature.
The technology that allows the hydrometer or thermohydrometer to report the water pressure varies from model to model and can be more or less linked to electronic measuring instruments, but the purpose and general operation are always the same.
For the field we are interested in, the most popular are diaphragm pressure gauges. They contain a deformable element, consisting of a membrane, and a capillary, which separate the measurement environment from the outside. If the pressure to be measured is greater than the chosen parameter, the liquid will run along the capillary and swell the membrane, and vice versa. A system of levers (leverage) amplifies this bulge and transmits it to an index. Furthermore, the membrane is usually wavy to increase its flexibility. It is a similar operation to that already seen for capillary thermometers.
Too high a pressure and temperature value, or vice versa, indicate that the boiler is malfunctioning.
In fact, in optimal conditions, the boiler pressure should be kept around 1,5 bar. Small fluctuations are always possible, but for correct operation it is important that the pressure does not drop below 0,5 bar and does not rise above 3 bar: one of these two conditions in fact leads to a blockage of the system, for safety reasons.
Furthermore, pressure gauges and thermohydrometers also allow you to identify if there is air in the system: the air heats up and cools down at a different speed than the water, thus creating maximum and minimum peaks in the internal pressure. If very different readings are noted, it may be necessary to check the water circuit.
IMIT capillary manometers and thermomanometers
IMIT produces a wide range of capillary manometers and thermomanometers, mainly dedicated to mounting on boilers, stoves, fireplaces and other household appliances in general, capable of operating in a working range from 0 to 6 bar, and with temperatures from 0° to 120°C.
Aesthetically, the graduated display can be square or round, based on the dedicated housing, and the internal reading dials can be customized with colors and characters, making them completely customizable.
Certifications and production
IMIT pmanometers and thermohydrometers are built according to the European CE regulations, also respecting the EAC requirements for the Russian market. All the materials used refer to the ROHS FREE regulations in respect of the environment and health. The production is followed in every step, thanks to numerous intermediate tests and final checks, to guarantee the highest quality and reliability of product detection, which has always characterized our brand.
To find out more, browse our website and download our catalog. For further requests or commercial information about our products for industry, send an email to info@imit.it. Our staff will reply as soon as possible.