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april 2011

The operation of shut-off valves

The shut-off valve allows correct dosage of fuel to the heat generator

Boilers are generally equipped with a system able to monitor the temperature of the liquid (generally water) flowing inside the circulation system. It is essential to monitor the maximum and minimum temperature of the liquid in order to ensure a suitable temperature. The temperature control system for the liquid is a component of the fuel intake system, which in the past was equipped with a heat dissipation valve that did however have shortcomings: sometimes, for various reasons, a malfunctioning could cause the flooding of the entire boiler room. Now the modern technology available has made way for modern shut-off valves, which are devices able to keep the temperature of the system constant due to their precision of sensors. The use of the shut-off valve presents a further advantage: their easy installation allows the engineer to choose the valve size based on the dimensions of the pipe inside which the fuel flows.
The valve operates via a diathermic fluid to which a rod is attached that drives the shutter: this allows the shut-off valve to be closed when the temperature of the circulating fluid is too high or, as was more common in the past, if a liquid leak occurs.



See also
25/09/2014 Distinctive features of the fuel shut-off valve Various characteristics ensuring the Gnali Bocia fuel shut-off valve is a safe product

25/05/2016 Shut-off valves and monitoring of fluid temperature The shut-off valve is a positive-action device that cuts the fuel supply

25/12/2014 Fail-safe aspects of the fuel shut-off valve Operation and safety of the fuel shut-off valve for burners and boilers

25/03/2014 The design specifications of shut-off valves To allow the careful protection and control of the structures, shut-off valves must be designed according to the structural characteristics provided for by the I.S.P.E.S.L. (Italian Institute for Occupational Safety and Prevention)

25/03/2016 In the event of an emergency, the shut-off valve comes into operation Shut-off valves and security valves prevent damages to the thermic system.

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