1. Product Overview
High-pressure choke valves create a controlled pressure drop by varying or fixing the flow area. Selection must consider required flow coefficient, pressure differential, fluid phase, solids loading, erosion and actuation method.
Positive chokes use a fixed choke bean. Displayed adjustable models use needle/stem-and-seat or sleeve trim; any cage or orifice-plate configuration must be identified by its own approved model drawing. Manual and hydraulic actuation are available by model.
Listed union-end models use 2 in and 3 in sizes, while specified API 6A flanged end sizes extend through 4 1/16 in. Pressure ratings range from 5,000 psi to 20,000 psi.
2. Design Features
The flow-adjustment position can be read directly from the scale, allowing operators to quickly judge valve opening and adjustment status on site.
Choke beans, stem tips and seats use specified cemented-carbide materials, including tungsten-carbide grades where required, to improve erosion and wear resistance.
Needle, sleeve and fixed-bean trim is selected for the required flow area and pressure drop. High-velocity or solids-laden service requires model-specific trim selection and erosion inspection.
On models with a separate outlet flange or body section, the arrangement provides access to the seat and trim after isolation and depressurization.
Union and flange interfaces must be verified against the adjacent manifold by size, pressure rating, seal profile, ring groove or Fig designation and approved mating dimensions.
Fixed choke beans use inch sizes for compatibility with common high-pressure flow-control equipment and standardized spare-parts management.
3. Choke Valve Main Technical Parameters
| Model | Nominal Size | Pressure Rating | Overall Dimensions (mm) | Connection Type | Adjustment Type | Service | |
|---|---|---|---|---|---|---|---|
| 2" Fig 1502, 15,000 psi, F × M, Fixed Choke Bean | 2 ″ | 15,000 psi | 154 | 206 | Fig 1502 (F×M) | Fixed Choke Bean | Standard |
| 2" Fig 1502, 15,000 psi, F × M, Needle Adjustment | 2 ″ | 15,000 psi | 154 | 206 | Fig 1502 (F×M) | Needle Adjustment | Standard |
| 3" Fig 1502, 15,000 psi, F × M, Needle Adjustment | 3 ″ | 15,000 psi | 243 | 243 | Fig 1502 (F×M) | Needle Adjustment | Standard |
| 2 1/16" API 6A Flange, 5,000 psi, Sleeve Adjustment | 2 1/16″ | 5,000 psi | 214 | 214 | 2 1/16 in API 6A flange, 5,000 psi | Sleeve Adjustment | Standard |
| 2 1/16" API 6A Flange, 5,000 psi, Needle Adjustment | 2 1/16″ | 5,000 psi | 203 | 175 | 2 1/16 in API 6A flange, 5,000 psi | Needle Adjustment | Standard |
| 2 1/16" API 6A Flange, 10,000 psi, Needle Adjustment | 2 1/16″ | 10,000 psi | 225 | 195 | 2 1/16 in API 6A flange, 10,000 psi | Needle Adjustment | Standard |
| 2 1/16" API 6A Flange, 15,000 psi, Needle Adjustment | 2 1/16″ | 15,000 psi | 262 | 226 | 2 1/16 in API 6A flange, 15,000 psi | Needle Adjustment | Standard |
| 2" Fig 2002, 20,000 psi, F × M, Needle Adjustment | 2 ″ | 20,000 psi | 205 | 240 | Fig 2002 (F×M) | Needle Adjustment | Standard |
| 2 9/16" API 6A Flange, 10,000 psi, Needle Adjustment | 2 9/16″ | 10,000 psi | 298 | 264 | 2 9/16 in API 6A flange, 10,000 psi | Needle Adjustment | Standard |
| 2 9/16" API 6A Flange, 15,000 psi, Needle Adjustment | 2 9/16″ | 15,000 psi | 298 | 267 | 2 9/16 in API 6A flange, 15,000 psi | Needle Adjustment | Standard |
| 3 1/8" API 6A Flange, 5,000 psi, Needle Adjustment | 3 1/8″ | 5,000 psi | 289 | 226 | 3 1/8 in API 6A flange, 5,000 psi | Needle Adjustment | Standard |
| 3 1/16" API 6A Flange, 10,000 psi, Needle Adjustment | 3 1/16″ | 10,000 psi | 298 | 264 | 3 1/16 in API 6A flange, 10,000 psi | Needle Adjustment | Standard |
| 3 1/16" API 6A Flange, 15,000 psi, Needle Adjustment | 3 1/16″ | 15,000 psi | 295 | 264 | 3 1/16 in API 6A flange, 15,000 psi | Needle Adjustment | Standard |
| 3 1/16" API 6A Flange, 15,000 psi, Sleeve Adjustment | 3 1/16″ | 15,000 psi | 240 | 312 | 3 1/16 in API 6A flange, 15,000 psi | Sleeve Adjustment | Standard |
| 4 1/16" API 6A Flange, 5,000 psi, Sleeve Adjustment | 4 1/16″ | 5,000 psi | 298 | 264 | 4 1/16 in API 6A flange, 5,000 psi | Sleeve Adjustment | Standard |
| 4 1/16" API 6A Flange, 10,000 psi, Needle Adjustment | 4 1/16″ | 10,000 psi | 292 | 252 | 4 1/16 in API 6A flange, 10,000 psi | Needle Adjustment | Standard |
4. Choke Valve Structure Diagram
① O-ring I ② Washer ③ Support ring ④ Composite seal ring ⑤ Seal retaining ring ⑥ O-ring II ⑦ O-ring support ring
Rated Working Pressure: 5,000 psi to 20,000 psi
Nominal Bore: 2″ to 3″
Rated Operating-Temperature Range*: -29 °C to 121 °C
Applicable Product Specification: API Spec 6A and/or API Spec 16C, as documented for the ordered model. API Monogram eligibility is limited to the licensed scope shown on the Certificates page.
* Actual temperature capability depends on the documented material, elastomer, lubricant and ordered service configuration.
