1, Fluid flow is from up to down, pilot balanced cage guided control valve has a separate pressure balanced pilot plug compared to the regular cage control valve.
2, The main plug is closed tightly by the output force of actuator and the unbalanced force from fluid pressure difference while the valve is closed. The pilot plug is closed tightly by the output force from actuator and the spring reaction force.
3, The flow capacity in the channel of pilot plug and seat should be bigger than the flow capacity in the guided ring and the gap between plug and cage, otherwise, the pressure balance cannot be established and this would lead to valve closure.
4, The opening of pilot plug is controlled within the range of 10% of the valve opening, otherwise the range of small flow valve can not be adjusted.
5, Small size, compact structure, good sealing performance
6, High ability of cut off, long service life. This series can be used for evacuation and shut-off, especially in occasions with high temperature, high pressure and large valve size.
ANSI Class 150#～600#
Flanges(FF,RF,RJ,RTJ),Socket Weld, Butt Weld(SW,BW)
Metal seat:ANSI Class IV(Cv×0.01%),ANSI Class V