Cage double-seat control valve adopts the cage guided structure and pressure balanced plug. this kind of control valve adopts the cage double-seat structure and is mainly used in applications that do not have high requirements for shut-off class. As it adopts the double-seat structure, and the two sealing faces are metal seals, the temperature range is wider. The plug makes use of the pressure balanced structure, the opening and closing force is low and the media under service conditions with high differential pressure can be controlled through relatively low actuator thrust. It is widely used for fluid control on pipelines of middle and low temperatures and middle and low pressures that require good dynamic stability. With such features as good sealing performance, high allowable differential pressure, cage guiding, large guiding area, good stability and compact structure, it can realize fast replacement of trims on the line with high maintenance efficiency, saving manpower and time. The balanced plug structure makes sure that the actuator thrust required is the lowest.
Parameters of control valves：
| Trim features： | cage guided balanced trim structure cage double-seat structure |
| Body type： | straight-through type / angle type |
| Bonnet type： | standard type heat dissipation type cryogenic type bellows type |
| Flow characteristic： | equal percentage linear quick open |
| Size： | DN40-400（1.5”-16”） |
| Pressure class： | PN1.6、4.0、6.3Mpa（ANSI 150、300、600LB） |
| Leakage class： | ASME B16.104 Ⅲ（standard type metal seat） |
| Pipe connection type： | flange type butt welding type |
| Applicable temperature range： | -196C° ～ 550C° |
| Actuator type： | pneumatic diaphragm actuator pneumatic piston actuator electric actuator |
