Technical Data Sheet: 4-1/16″-3000PSI Adjustable Angle Choke Valve
Item | Spezifikation |
Product Name | Adjustable Angle Choke Valve |
Ventiltyp | Angle Pattern (Vertical Inlet / Horizontal Outlet) |
Nenngröße | 4″ (4 1/16″ / 103 mm nominal bore) |
Druckbewertung | 3000 PSI (21 MPa) |
End Connections | Flanged (API 6A), Optional: Hub or Welded |
Design Standard | API Spec 6A / API Spec 16C |
General Description
The Adjustable Angle Choke Valve is a critical component used in oil and gas wellhead assemblies (Christmas trees) and kill/choke manifolds. Its primary function is to regulate and control the flow rate and pressure of produced fluids (oil, gas, and water) from the well . By manually turning the handwheel, the stem advances or retracts a tapered needle or plug relative to a seat, precisely varying the flow area. This model features a robust angle body design (90°) which inherently provides erosion resistance by directing flow away from the sealing surfaces .
Technical Parameters
Parameter | Value / Range | Bemerkungen |
Druckbewertung | 3000 PSI (21 MPa) | Working pressure per API 6A |
Nominal Bore Size | 4 1/16″ (103 mm) | Corresponds to 4″ nominal size |
Temperature Class | PU / L-U | Standard: -29°C to 121°C (-20°F to 250°F) |
Material Class | AA | Standard for general service (Other classes like BB, CC, DD, EE, FF available on request) |
Specification Level (PSL) | PSL 1 | PSL 2 and 3 available for higher requirements |
Performance Level (PR) | PR 1 | PR 2 available for critical service |
Suitable Media | Petroleum, Natural Gas, Drilling Mud, Water | Fluids containing sand or solids are acceptable due to hardened trim |
Flow Direction | Under the seat (angle pattern) | Standard: Inlet vertical, outlet horizontal |
Adjustment Type | Manual (Handwheel) | Rising stem with visual position indicator |
Stem Operation | Rotating / Rising | Handwheel turns clockwise to close (decrease flow) |
Materials of Construction
Component | Standard Material | Remarks / Alternative |
Valve Body | WCB (Carbon Steel) / A105 | Meets NACE MR0175 for sour service upon request |
Bonnet / Cover | WCB (Carbon Steel) / A105 | |
Stem / Needle | Hardened Stainless Steel | 2Cr13, 17-4PH, Inconel 718 for high strength |
Choke Seat / Nozzle | Tungsten Carbide / Stellite | Interchangeable for fixed orifice applications; provides extreme erosion resistance |
Stem Tip / Plug | Tungsten Carbide / Stellite | Ensures long life under high-velocity flow |
Packing / Seals | PTFE / Flexible Graphite | High temperature and chemical resistance |
Gasket (Body/Bonnet) | Ring Type Joint (RTJ) | Material: Soft Iron or Stainless Steel (depending on class) |
Handwheel | Carbon Steel | Position indicator window included |
Dimensional Data (Approximate)
Note: Dimensions may vary by manufacturer. For exact installation dimensions, please consult the specific manufacturer’s GA drawing.
Dimension | Value (mm) | Value (inches) | Bemerkungen |
Valve Size (Nominal) | 103 mm | 4 1/16″ | |
End-to-End (Face-to-Face) | 298 mm | 11.73″ | For 4 1/16″-3000PSI Angle Valve |
Center to Top (Height) | 264 mm | 10.39″ | From centerline of outlet to top of bonnet |
Flange Diameter | 292 mm | 11.5″ | Approx. for API 6A 3000PSI Flange |
Bolt Circle Diameter | 244.5 mm | 9.62″ | Approx. for API 6A 3000PSI Flange |
Hub / Ring Gasket | R37 | | Ring groove for 4 1/16″-3000PSI |
Approx. Weight | 180 – 230 kg | 400 – 500 lbs | Depends on trim and manufacturer |
Applicable Standards & Specifications
- Design & Manufacture: API Spec 6A (Specification for Wellhead and Christmas Tree Equipment)
- Additional Design: API Spec 16C (Choke and Kill Systems)
- Flange Connections: API 6A (6B / 6BX Flanges)
- Testing: API 6A / API 16C (Hydrostatic and Gas testing)
- NACE Compliance: NACE MR0175 / ISO 15156 (for H₂S service – optional)
Key Features & Applications
Key Features:
- Precise Flow Control: Allows fine-tuning of flow rates and pressures through a linear or equal percentage characteristic.
- Erosion Resistance: The hardened trim (Tungsten Carbide/Stellite) withstands the destructive forces of high-velocity, solids-laden fluids .
- Angle Pattern Design: The 90-degree body design helps protect the stem and sealing area from direct impingement of flow media, extending valve life .
- Visual Indication: A protected position indicator on the bonnet shows the exact opening percentage of the valve .
- Interchangeable Trim (Optional): Some models allow conversion between adjustable and fixed choke modes by changing the internal nozzle.
Main Applications:
- Wellhead Christmas Trees: Regulating production from oil and gas wells .
- Kill and Choke Manifolds: Controlling well pressure during drilling and workover operations .
- Flow Lines: As a primary control valve for flow rate and pressure reduction.
- Test Separators: Controlling flow into testing equipment.
Ordering Information
When ordering, please specify:
- Valve Size: 4 1/16″
- Pressure Rating: 3000 PSI
- End Connection Type: Flanged (API 6A) / Hub / Weld End
- Material Class: AA, BB, etc.
- Temperature Class: PU (Standard) or others
- Specification Level (PSL): 1, 2, or 3
- NACE Requirement: Yes / No
- Special Trim: If required (e.g., Full Tungsten Carbide)
Notes:
- This datasheet is a general guide based on API specifications and common industry practices.
- Always refer to the manufacturer’s certified dimensional drawing for installation.
- Pressure and temperature ratings are maximum allowable and should not be exceeded.
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