AST SMU7000 1402419 Disc

Safety Relief ValvesSMU-7000/ASV & /SLSVActuator controlled by electronic or pneumatic devices Bellows and piston availableEasy replaceable seat for quick maintenance and costs saving Metal to metal seat superiortightness Full nozzle design Special flanges availableMain featuresThese valves represent the capability of AST to develop special valves for customer needs.Assisted Safety Relief Valves (ASV)This is a standard safety valve equipped with a pneumatic actuator that allows to open the valve witha pneumatic or electronic remote signal. It may be used to depressurize the vessel in case of fire or tocheck the functionality of the valve when the process medium tends to solidify. Overpressure can also becontrolled and reduced to 2%.The connection between the actuator and the valve stem is done in such a way that a failure of the assisting mechanism does not impair the functionality of the valve.Supplementary Loaded Safety Relief Valves (SLSV)This is a standard safety valve equipped with a secondary spring and a double acting pneumatic pistoncontrolled by a redundant system.This valve may be used when the difference between set pressure and operating pressure is less than10%; in this case the leakage through the seats is greatly reduced or eliminated. Blowdown can also becontrolled and kept between 3 and 4%.20