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april 2011

Safety valves for gas blocking

The characteristics of the gas block valves, safety first.

Why install gas block valves?

Gas systems are fundamental resources within both civil and domestic buildings but hide a series of pitfalls closely related to the fluids that are conveyed inside the ducts. In fact, a fundamental characteristic of these gases is their flammability and the tendency to accumulate in the environments if an anomaly or malfunction occurs in a part of the system itself. In this context, the gas block valves are of particular importance, as they constitute a solid and effective prevention mechanism that guarantees reliability and protects the health of persons who may be in the vicinity.

Operation, reset and installation of the gas block valves

Gas block valves are known devices that have been in use for some time and their operation is based on the pressure detected. In fact, whenever an excessive pressure value of the gas conducted inside the pipes is detected, the valve closes and the flow is interrupted, thus preventing any problems that may arise. Furthermore, this particular type of device can also detect the detachment of the pipe from the user, avoiding harmful and dangerous dispersions. An important aspect to consider is that once the valve has closed, resetting can only be done manually and, generally, by qualified personnel to carry out this operation. In this way it is possible to check whether the closure of the valve depends on an anomaly in the detection or was caused by a failure in the system, helping the operator in preventive maintenance.

The difference between safety and gas block valves

Various types of gas valves are available in the Gnali Bocia catalog and there is an important difference between safety and block valves. Although both act as fundamental devices to protect the health of persons and the integrity of buildings near the installation area, the operating principle is slightly different. In fact, if the block valves are based on an excess in the pressure of the gaseous fluid conveyed, the safety valves detect the absence of the flame necessary for the combustion process (found, for example, in boilers) and intervene by blocking the flow of gas.
In any case, whether it is a safety valve or a gas block valve, it is essential to design, build and set up according to the regulations in force. An error in one of these phases can compromise the success of the others and generate problems in operation, even of considerable importance. For this reason, Gnali Bocia has a certified supply chain that goes from the production of the material to the production process, with effective and efficient quality control aimed at detecting defects and imperfections.

See also
02/04/2022 Safety valves and block valves In addition to the safety valves, in the catalog you can also find block valves that foresee uncontrolled leaks

02/09/2021 Using safety valves equipped with thermocouple Safety valves for intercepting gas if the flame dies.

02/07/2021 The use of pressure stabilizers in agriculture What are price stabilizers, how they are produced and how they are installed in industrial and agricultural plants.

02/06/2017 You don't need an operator, all you need are some air vent valves Using air vent valves to stop air and gas from accumulating in your system is important for optimal system performance

02/01/2020 Let's not forget the air relief valve in our installations Air relief valve combined with the automatic check valve for easy maintenance

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