Urea P4 regulating pneumatic valve is equipped with pneumatic valve position feedback device summary < / div >

1 urea urea P4 P4 regulating characteristics of pneumatic valve adjust the medium for urine of pneumatic valve, easy crystallization and without by-pass pneumatic valve, pneumatic valve pressure difference before and after the big, medium high flow velocity. Pneumatic valve such as the air pressure is low or pneumatic valve core was stuck, will cause the pneumatic valve opening is not in place. If fully open or close the case, it will cause the overpressure, overpressure and medium voltage system synthesis tower caused unstable production technology, and even cause overpressure explosion accidents. P4 pneumatic valve control system is normal or not, therefore, is one of the premise of stable and safe operation of the urea system.
2, equipped with pneumatic valve position feedback device is
Shanghai co. , LTD. , urea P4 pneumatic diaphragm regulating pneumatic valve pneumatic valve position feedback signal output, therefore, on the DCS screen display of pneumatic valve stroke is the output signal adjusting circuit. In regulating pneumatic valve under the condition of normal work, can make the output signal adjusting circuit is near to pneumatic valve position opening, but it is a kind of open loop control, is not true of the opening of the pneumatic valve position. So in July 2009 in urea by adding 1 only on P4 regulating pneumatic valve pneumatic valve position transmitter, will adjust the pneumatic valve displacement change into the corresponding current output signals to the control room, facilitate timely understanding of P4 regulating pneumatic valve switch operators location of the actual situation. After more than two years of operation, the effect is good. 3 conclusion

pneumatic valve position transmitter is regulated P4 pneumatic valve stroke output feedback device, to adjust the opening of pneumatic valve body displacement according to certain rules of converted to electrical signals sent to the control room. The current signal is the continuous signal any pneumatic valve opening, can also be used for remote operation and control circuits of important, real-time monitoring of pneumatic adjust the travel conditions of pneumatic valve, at the same time, set the pneumatic valve position trip transfinite alarm signal, and ensure the device and stable operation, eliminates the significant security hidden danger.