How is the import regulation pneumatic valve adjustment

in the production process automation control system, the import of regulating pneumatic valve is an important and indispensable link, known as 'hands' of the production process automation, is one of the automatic control system of terminal control components.
regulating pneumatic valve flow is simple, small resistance, generally applies to positive adjustment ( The installation. However recommend adjustment pneumatic valve reverse adjustment in high pressure drop situation, to improve the unbalanced force and reduce the damage for pneumatic valve core, as well as to the flow of the medium, avoid regulating pneumatic valve coking and clogging. Adjustment pneumatic valve in the reverse adjustment, especially the case should avoid small open degree is open for a long period of time, in case of strong oscillation pneumatic valve core damage. Trial production stage, especially in petrochemical plants due to the low load trial production, design, process conditions can't meet the requirements, soon reverse adjustment of the adjustment of pneumatic valve should as far as possible to avoid a long time in the small open open situation, in case of regulating pneumatic valve damage.
in the production process automation control system, adjust the pneumatic valve is an important and indispensable link, known as 'hands' of the production process automation, is one of the automatic control system of terminal control components. It is consists of two parts, actuators and pneumatic valve. From the point of view of hydraulic, regulate the pneumatic valve is a throttling element local resistance to change, adjust the pneumatic valve is according to the input signal by changing the schedule to change the resistance coefficient, so as to achieve the purpose of flow adjustment.
to adjust the structure of the pneumatic valve and regulating
, adjust the structure of the pneumatic valve
regulating pneumatic valve in addition to the pneumatic valve body for, other structures and single-seat pneumatic valve, its characteristics to determine the flow of a simple, small resistance, especially for high pressure drop, high viscosity, containing suspended solids and granular material flow regulation. It can avoid coking, bonding and jam phenomenon, also facilitate cleaning and self-purification.
and regulating pneumatic valve, reverse adjust is
in general, regulating pneumatic valve adopts is installed, the bottom into the side out. Occasions only in high-pressure differential and high viscosity, easy to coking, under the condition of suspended particulate medium, to recommend a reverse installation, namely material side in bottom out. Is the purpose of regulating pneumatic valve reverse adjustment in order to improve the unbalanced force and reduce the wear and tear of pneumatic valve core, as well as to high viscosity, easy to coking and suspended particulate medium flow, avoid coking and clogging.
and regulating pneumatic valve in production is how to adjust the
we know, now in addition to the imported pneumatic valve and pneumatic diaphragm valve completely symmetrical in structure, the adjustment of the structure of all other pneumatic valve is not symmetrical. When regulating pneumatic valve to change flow direction, due to the change of flow will cause value changes. Each kind of regulating the normal flow of pneumatic valve to make the direction of the pneumatic valve core to open ( Positive adjustment, factory can only provide normal flow to the value of the flow capacity and flow characteristics. When adjustment pneumatic valve reverse adjustment, both fluid along to close the pneumatic valve core in the direction of the flow, to adjust the flow capacity of pneumatic valve will increase. Water linkage, the simulated process conditions can't reach normal soon, regulating pneumatic valve in a long time in a small open degree of condition adjustment, due to the effect of unbalanced force, there will be a serious instability. So regulating pneumatic valve will produce strong screeched shock and noise, and pneumatic valve core fracture soon. And under the condition of normal process, adjust the opening of pneumatic valve is modest, even if small open degree is short, so regulating pneumatic valve can adjust the normal safety.