Cage guided double seat control valve has a cage type guiding and pressure balanced plug. Different from single seat control valves, double seat control valve has double seat structure and double sealing rings, it is mainly used in applications that do not have high requirements for leakage class. The main sealing ring is metal, and second sealing ring can be soft or metal, if the soft sealing ring is used then it will be have better leakage class, or use metal seal ring for wider working temperature range. Pressure balanced structure to be used so 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.
Cage guided double seat control valve 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
