The structure of the fire valve
Fire valve structure is mainly composed of body and actuator component. Fire valve body by shell, flange, blade and blade linkage, etc. Fire valve actuator by shell, leaf adjusting mechanism, clutch, temperature fuse, etc. Fire valve actuator is through the metal fusible sheet and clutch mechanism to control the rotation of the blade.
The working principle of the fire valve
When the pipeline in conveying gas temperature reached fusible sheet metal melting temperature, fusible sheet fuse, its core shaft compression spring and spring pin quickly lay a clutch plate, at this time, clutch and blade regulatory agency release, because the body is equipped with two torsion spring, make the blade by torsion and produce rotation. Thus it can be seen, fire valve actuator using mechanical transmission principle, do not need electricity, gas and other energy, thus ensure fire valve in any case all can have fire prevention effect. Fire valve on-off according to the requirements of the system, the system discontinued and normal operation, is located in the open position, such as the transportation pipe gas temperature below the selected metal fusible sheet of melting point, is a normal operation state, the valve is open. Only when the operating conditions beyond the normal use of state, the valve to close automatically, fire valve up to security role.
 

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