High Flow Plug & Cage Trim

The plug and cage trim uses a solid plug with a pressure balancing holes moving inside a ported cage to control flow. This design provides the maximum flow capacity for a cage trim choke valve.
In closed position, the plug moves down closing the ports in the flow cage and makes contact with the seat ring to provide a positive shut off.
Flow is directed into the trim via ports and impinges in the centre of the flow cage.
The plug is guided internally in the flow cage controlling the opening of the ports and the flow rate.
The flow cage is supported at both ends by the body and bonnet providing a rigid and robust design.
Plug and flow cage are generally supplied in tungsten carbide to enhance erosion resistance of this robust trim.

4x4 CONTROL CHOKE TRIM

Flow is directed through ports into the centre of the trim where it impinges on flow from the opposite port.
4 diametrically opposed ports   can   provide the   highest wear resistance in a ’cage’ type flow trim.
4 small   ports   in the lower section provide fine control at low openings while 4 larger ports provide capacity for higher flows.
4 Port flow geometry provides a balanced flow pattern, which starts as an equal percent type characteristic and moves towards linear. Flow  rate  is adjusted by the  use  of a plug  moving inside the  flow cage for ’Plug and  Cage’ type  of valve  or by use  of a sleeve  on theoutside of the flow cage for ’External Sleeve’ type of valve.

Model VPC40 4” nominal with Plug & Cage Trim

Features

• Forged or cast body construction.
  
• Body materials from carbon steel, stainless steel, duplex stainless steel and corrosion resistant alloy.
  
• Pressure rating: 2K, 3K, 5K, 10K and ANSI pressure classes up to 4500.
  
• Enlarged body gallery maximizes flow capacity and minimizes body & outlet erosion.
  
• Bolted bonnet enhances safety.
  
• Accurate ‘micrometer’ style position indicator.
  
• Linear non-rotating stem movement optimizes stem packing life.
  
• Shut off to ANSI Class IV, V (and Class VI).
  
• Cartridge style trim installation uses no internal threads or special tools – ease of field maintenance.
  
• Pressure balancing plug design reduces operating torque.
  
• Range of actuators and mounting kits for ease of automation.
  
• Spring energized lip seals with scrapers and bearings used for dynamic seals enhance reliability of stem packing and pressure balance sealing.
• Various Inlet & Outlet distances can be kept as per client requirement.