Fluorine valve gate locator fault and maintenance methods

ordinary locator by mechanical force balance principle of work, namely the nozzle baffle technology, there are main failure types:

( 1) Due to adopt mechanical force balance principle of work, the more moving parts, are susceptible to the influence of temperature, vibration, causing the regulator fluctuations;

( 2) The nozzle baffle technology, as a result of nozzle hole is very small, vulnerable to dust or not clean air plug, the locator does not work;

( 3) Using force balance principle, the elastic coefficient of spring in bad change, caused by nonlinear led to the decrease of the quality of the control valve.

( 4) The intelligent positioner by microprocessor ( CPU) , A/D, D/A converter, such as components, its working principle and common locator is very different, the comparison of the given value and actual value is pure electric signals, is no longer force balance. Therefore able to overcome the shortcomings of the conventional locator force balance. But for emergency in the parking lot right, such as emergency shut-off valve and emergency vent valve, the valve for stationary at a particular location, only an emergency occurs, only need action, in a reliable way to stay for a long time at a particular location, easy to make electrical converter is out of control to the risk of small signal not action. In addition. For the position of the valve sensing potentiometer because working in the field of small signal caused resistance to change is not action, the danger of large signal full open. Therefore, in order to ensure the reliability and availability of the intelligent positioner, these must be tested frequently.