Description

Electric Actuated Angle Pattern Throttling Valve Technical Data Sheet

(API 6A Standard / Electric Actuated)

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1. Product Overview

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2. Applicable Standards & Specifications

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3. Main Technical Parameters

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4. Electric Actuator Specifications

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5. Material of Construction (API 6A Material Classes)

Materials selected per API 6A based on service conditions (H2S, CO2, Temperature).

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6. Structural Features & Working Principle

6.1 Valve Design Features

6.2 Working Principle

1. Modulating Control: The electric actuator receives a 4-20mA control signal from the control system (DCS/PLC), positioning the stem and plug precisely.

2. Flow Regulation: As the plug moves into the seat, the annular flow area is reduced, creating pressure drop and controlling flow rate.

3. Erosion Resistance: Hardfaced trim ensures long service life even with abrasive media (sand, proppant).

4. Fail-Safe Options: Available with battery backup or spring-return for fail-safe positioning on power loss.

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7. Choke Trim Options

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8. Dimensional Data (Reference – API 6A 5000 psi / 10000 psi)

Note: Dimensions are for reference only. Final dimensions vary by manufacturer, PSL level, actuator size, and specific pressure rating. Consult API 6A and manufacturer’s GA drawing.

8.1 Valve Body Dimensions (Approximate)

8.2 Overall Dimensions with Electric Actuator

Note: Actuator dimensions vary significantly by manufacturer and torque requirements. The table below provides approximate overall heights including actuator.

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9. Testing & Inspection (Per API 6A)

Optional Tests:

• NDT (Non-Destructive Testing): UT, MT, PT on critical areas

• PMI (Positive Material Identification) on all pressure-containing parts

• Cryogenic testing (for low temperature service)

• NACE MR0175 / ISO 15156 material verification

• Hydrostatic test with traceable chart recorder

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10. Installation, Operation & Maintenance Instructions

10.1 Pre-Installation

• Inspect RTJ grooves for damage. Ensure Ring Gasket material matches service (Soft Iron for general, 316L/Inconel for corrosive) .

• Clean all surfaces thoroughly.

• Check actuator operation (manual override) and electrical connections.

• Verify valve pressure class, material, and trim match service requirements.

10.2 Installation

• Install with flow arrow pointing downstream (flow tends to close recommended for throttling).

• Use new RTJ gasket of correct size and material.

• Lubricate stud threads and ring gasket lightly.

• Tighten flange nuts evenly in crisscross pattern to torque specified in API 6A.

• Support piping adequately to avoid stress on valve flanges.

• Ensure adequate clearance for actuator removal/maintenance.

• Connect electrical wiring per actuator wiring diagram.

• Verify proper grounding and explosion-proof installation (if applicable).

10.3 Electrical Connection

• Power supply: As per actuator nameplate (220V/380V/415V AC, 24V DC, etc.)

• Control signal: 4-20mA DC (for modulating control)

• Feedback signal: 4-20mA DC (position feedback)

• Cable glands: Use appropriate explosion-proof cable glands (if hazardous area)

• Test local/remote operation before commissioning.

10.4 Operation

• Electric Mode: Actuator positions valve based on control signal. Do not operate manual override while actuator is energized.

• Manual Override: Use handwheel only when power is off or for emergency. Do not use excessive force.

• Throttling Range: Optimal control between 10% and 90% open. Avoid continuous operation at extreme low openings (<10%) to prevent trim erosion.

10.5 Maintenance

• Periodic Inspection:

  • Check actuator for proper operation, unusual noise, or vibration.

  • Inspect stem seals for leakage.

  • Verify calibration of positioner/feedback.

• Lubrication: Follow actuator manufacturer’s recommendations for gear lubrication.

• Trim Inspection:

  • Depressurize valve completely before disassembly.

  • Inspect choke trim (needle/plug and seat) for erosion/wear.

  • Replace worn trim with OEM parts to maintain API 6A compliance.

• Spare Parts: Recommended spare parts include trim kits, stem seals, gaskets, RTJ rings, and actuator spare parts (batteries, boards, etc.).

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11. Ordering Information

When ordering Electric Actuated Angle Pattern Throttling Valves (API 6A), please specify:

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Note: This technical data sheet complies with API 6A specification for wellhead and tree equipment. For specific project requirements, including detailed material selection, PSL level, actuator sizing, and dimensions, please refer to the approved API 6A data sheet, actuator torque requirements, and purchase order. Specifications are subject to change without notice.