From the application of the control valve, the direction of development

a. Fine small Executing Agency: reduce costs, improve the flow capacity.
b. Sleeve guide: sleeve guide, help, there is help to reduce friction, is conducive to noise reduction, is conducive to the flow characteristics of the swap.
c. The balanced spool: To reduce the the actuator thrust or push torque, balanced spool is important, the system dynamic performance also improved.
d. Integration plug and seat: In order to overcome the shortcomings of poor seat valve sealing the integration plug and seat of the same material composition trim at the same time to minimize leakage and unbalanced force.pneumatic fitting
e. The simple flow path: a simple flow path, the flow resistance is reduced, the pressure loss across the valve can not only decrease and the cost can be reduced. L-sealing and friction: good sealing performance and friction performance is a contradiction in terms of both the control valve is designed not only to solve sealing problems, must also pay attention to the friction and life and other performance indicators. Therefore, in recent years, the study of the stuffing box and packing structure attention rotary control valve to be more widely used.
g. Reduce noise: the use of a variety of ways to reduce control valve noise, for example, the use of noise reduction sleeve and spool, multi-stage spool, the use of noise reduction metering plate expander.
h, control valves and pipes with diameter trim and limit the flow capacity: body is conducive to reduce the the valve population pressure and outlet fluid flow rate, without having to install additional diameter pipe fittings, will help reduce costs by replacing The flow capacity of the trim, scalable flow capacity, through the selection of the limited flow capacity trim to correct the calculated diameter is too large error.
i in the digital information age, more frequent use of smart valve positioner or laws of nonlinear digital controller to compensate the accused object nonlinear, less preferred control valve flow characteristics to compensate for the controlled object nonlinear.
Trim material varies with temperature, therefore, should consider the impact of thermal expansion at different temperatures, but also consider under high temperature and pressure rating changes should consider the corrosion resistance, fatigue resistance performance.electric solenoid valve