Term of the features and functionality of the control valve

Spring setting range: spring adjustment range of control valve actuators, force balance and the actual process.
Flow capacity: Rated flow through the valve under specified conditions.
The gap flow: When the closure components Block timely flow below the minimum controllable flow.
Diaphragm pressure range: diaphragm pressure range high and low value of the difference. This can be considered an inherent or installation characteristics.
Double acting actuator can provide the driving force of the implementing agencies: in any one direction.shut off solenoid valve
Dynamic unbalance force: the role of the process fluid pressure in any predetermined degree of opening, on the spool
Effective area: in the diaphragm actuator, the effective area is effectively produce an output force that part of the diaphragm area. The effective area of ​​the diaphragm may be changed with its movement, usually at the beginning of the stroke, while at the end of the stroke to a minimum. The molded diaphragm tablet diaphragm smaller effective area of ​​change, it is recommended to use the molded diaphragm.
Loss of air pressure to - Close: such a state: When the drive energy is lost, the valve closure element to the closed position.
Loss of gas to - Open: such a state: When the drive energy is lost, the valve closure element to the open position.3 way air valve