External Sleeve Choke Valve
The external sleeve control choke has a sleeve that throttles the flow on the external diameter of the ported cage. The external sleeve trim is particularly suited for low-capacity/high pressure-drop applications. The external sleeve is designed specifically for severely erosive service where the combination of high pressure drops and high sand concentrations can reduce the life of a choke.
- Available in various sizes ranging from CC15 to CC80 choke models.
- Tungsten carbide-lined external sleeve and solid tungsten carbide cage/seat provide optimum wear resistance in erosive conditions.
- Metal body-to-bonnet gasket for absolute pressure containment.
- Reverse angle external sleeve improves flow dynamics within the trim.
- Self-flushing, pressure-balanced ports reduced stem loads and actuator output requirements.
- Heavy-duty thrust bearings reduce operating torque.
- Pressure-balance seals are a key feature of the pressure-balanced trim arrangement, reducing operating forces and enabling greater ease of adjustment.
2″-12″ 150-2500lb
2 1/16″-5 1/16″ 2000-15000psi
Basic Design: API 6A
Test & Inspection: API 6A
Design Features
- Designed for high pressure drops and severe erosive flow with sand combination
- Application: Wellhead production and injection
Specifications
- Basic Design: API 6A
- Working Pressure (psi) 2M, 3M, 5M
- Main nominal size (in) 2-1/16, 3-1/8 (3-1/16), 4-1/16, 5-1/16
Optional Features
- Low alloy Steel or stainless Steel valve body
- Regular Bore, Full bore
- Swing or Lifting Type
- Trim AA, BB, CC, DD, EE, FF
| Bore Size |
2 1/16" - 5 1/8" |
| Working Pressure |
2,000psi - 20,000psi |
| Material Class |
AA - HH |
| Working Temperature |
P-U |
| Specification class |
1 - 4 |
| Performance class |
1 - 2 |
| Connection type |
flanged,studded,weco union |
Features
- Large visual indicator provides position in 1/64 in (bean) as standard.
- External grease port lubricates threads and bearings.
- Stem lock maintains set position.
- Bleed plug assembly vents pressure before disassembly.
- Antirotation key translates rotation from the drive bushing into linear movement of the lower stem/flow plug assembly.
- Two-piece stem is threaded and locked, and is removed from wellbore fluids.
- Large annulus area reduces the risk of body and trim erosion caused by high velocities.
All control chokes are available in manually operated or actuated models. Custom-designed trim components to suit a wide variety of Cv capacities and flow characteristics also are available.
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