Relief valve p.max 1bar

Relief valves are safety devices which discharge a certain quantity of gas to the outside when the pressure at the control point exceeds the calibration pressure (bubble burst pressure) due to non-lasting events such as the closure of valves shut-off in a very short time and/or gas overheating with no required flow rate. the discharge of the gas to the outside can, for example, avoid the intervention of the blocking devices for transient causes not deriving from damage to the reducers. Obviously the quantity of gas discharged depends on the extent of the overpressure with respect to the setting. The operating principle of these safety devices is based on the comparison between the thrust on the diaphragm or piston deriving from the pressure of the gas to be controlled and the thrust deriving from the setting spring. Obviously, the weight of the mobile unit, the static thrust and the residual dynamic thrust on the armed pad also intervene in this comparison. When the thrust deriving from the gas pressure exceeds that of the spring, the obturator is lifted with consequent discharge of a certain quantity of gas; otherwise the obturator is released and closes the valve seat under the thrust of the pressure of the gas to be controlled only and not of the setting spring. In this way, damage to the cocked pad due to incorrect maneuvers of the calibration adjustment nut is avoided.

Marking and Standard References Degree of Protection:
Complies with Directive 97/23/CE (PED Directive) Complies with Directive 94/9/CE (ATEX Directive) Rp threaded connections: according to EN 10226 • PN 16 flanged connections: (DN 25 - DN 32 - DN 40 - DN 50) according to ISO 7005

Material
Relief valves are safety devices which discharge a certain quantity of gas to the outside when the pressure at the control point exceeds the calibration pressure (bubble burst pressure) due to non-lasting events such as the closure of valves shut-off in a very short time and/or gas overheating with no required flow rate. the discharge of the gas to the outside can, for example, avoid the intervention of the blocking devices for transient causes not deriving from damage to the reducers. Obviously the quantity of gas discharged depends on the extent of the overpressure with respect to the setting. The operating principle of these safety devices is based on the comparison between the thrust on the diaphragm or piston deriving from the pressure of the gas to be controlled and the thrust deriving from the setting spring. Obviously, the weight of the mobile unit, the static thrust and the residual dynamic thrust on the armed pad also intervene in this comparison. When the thrust deriving from the gas pressure exceeds that of the spring, the obturator is lifted with consequent discharge of a certain quantity of gas; otherwise the obturator is released and closes the valve seat under the thrust of the pressure of the gas to be controlled only and not of the setting spring. In this way, damage to the cocked pad due to incorrect maneuvers of the calibration adjustment nut is avoided.