API 6A Fixed Throttle Valve
Nominal Sizes: 2-1/16″ to 4-1/16″
Working Pressure Ratings: 2,000 PSI to 15,000 PSI (13.8 MPa to 103.4 MPa)
Product Specification Levels (PSL): PSL 1, PSL 2, PSL 3, PSL 3G
Performance Requirement Levels (PR): PR 1, PR 2
Material Classes: AA, BB, CC, DD, EE, FF, HH (Fully compliant with NACE MR0175 / ISO 15156)
Temperature Ratings: K, L, P, R, S, T, U, V (-46°C to +121°C)
إنهاء الاتصالات: API 6A Flanged, Threaded, or Clamp Hub
API 6A Fixed Throttle Valve
تعريف المنتج ومهمة السلامة:
The API 6A Fixed Throttle Valve (Positive Choke) is a critical flow-control component for high-pressure wellheads and Christmas trees, designed to regulate production rates via precision fixed-orifice choke beans. Featuring a heavy-duty forged angle body, it easily withstands pressure differentials up to 15,000 PSI and severe fluid erosion. The quick-change bonnet with an integrated pressure-relief valve allows safe, rapid bean replacement without removing the valve body from the line.
JH-Valve Fixed Throttle Valve Technology Core:
- Erosion-Resistant Choke Bean: Premium Tungsten Carbide or Ceramic lining | Surface hardness ≥ 70 HRC, providing exceptional resistance to sand slurry and high-velocity erosion
- Quick-Change & Safety Pressure Relief: Heavy-duty quick-release bonnet with relief fittings | Enables fast choke bean swapping while protecting field technicians from residual cavity pressure
- Severe Sour Service Metallurgy: API Material Classes AA–HH | 100% compliant with NACE MR0175/ISO 15156 standards for H2S and CO2 stress cracking resistance
- High PSL & PR2 Level Integrity: Built to strict API 6A PSL 3/PSL 3G specifications and PR2 performance requirement levels | Guarantees zero-leakage reliability under severe thermal and pressure cycling
- Precise Flow
- Quick Service
- PSL 3G & PR2
Designed for high-pressure wellhead flow regulation, the JH Fixed Throttle Valve incorporates high-purity Tungsten Carbide or engineering ceramic choke beans to maintain stable orifice geometry and accurate flow rate under severe pressure drops.
الميزات الأساسية:
▌ Erosion-Resistant Carbide Choke Beans → Surface hardness ≥ 70 HRC, providing > 5x wear resistance | Prevents orifice enlargement under abrasive slurry flow to maintain stable production
▌ CFD-Optimized 90-Degree Flow Path → Engineered internal geometry via CFD simulations | Minimizes flow turbulence and localized erosion, safeguarding body wall thickness
▌ Extensive Orifice Size Options → Available in standard sizes from 4/64″ to 64/64″ (in 1/64″ increments) | Precisely satisfies variable flow requirements across different production stages
Engineered for efficient field maintenance and rapid bean replacement, incorporating a heavy-duty quick-change bonnet to minimize downtime while strictly protecting operators.
الميزات الأساسية:
▌ Hammer-Lug / Threaded Quick Bonnet → Fast disassembly design | Allows choke bean inspection and replacement in minutes without removing the valve body from the pipeline
▌ Safety Pressure-Relief Fitting → Integrated top safety relief valve | Safely bleeds off residual internal pressure prior to bonnet removal, preventing accidental injury
▌ Anti-Loosening Bonnet Locking → Robust structural engagement | Withstands cyclic shock pressures up to 15,000 PSI and guards against vibration-induced loosening
Engineered for ultra-high pressure, deep-water, and severe sour (H2S) gas applications, meeting the highest oilfield manufacturing and validation standards.
الميزات الأساسية:
▌ PSL 3 / PSL 3G Manufacturing Standard → 100% NDE inspection and high-pressure gas testing | Delivers zero-defect quality for critical offshore and onshore wellheads
▌ PR2 Performance Verification → Fully validated through API 6A PR2 thermal and pressure cycling tests | Guarantees sealing performance across extreme temperatures from -46°C to +121°C
▌ NACE MR0175 / ISO 15156 Compliance → Forged corrosion-resistant alloy construction (API Material Classes AA–HH) | Completely prevents sulfide stress cracking (SSC) in severe sour environments
التصميم الأساسي والمزايا
Superior Erosion Resistance → Equipped with high-purity Tungsten Carbide or ceramic choke beans (surface hardness ≥ 70 HRC) | Built for high-sand and high-differential pressure service, extending valve lifespan by ≥ 3x
Rapid & Safe Maintenance Experience → Hammer-lug / threaded quick-change bonnet with top pressure relief | Safely bleeds off cavity pressure prior to disassembly, enabling bean replacement in minutes without removing the valve body
Built to Highest API 6A Standards → Fully compliant with PSL 3 / PSL 3G product specification levels and PR2 performance verification | Guarantees zero-leakage reliability under extreme thermal (-46°C to +121°C) and pressure cycling
CFD-Optimized 90-Degree Forged Flow Path → Engineered internal geometry based on fluid dynamic simulations | Significantly reduces turbulence and localized erosion to protect valve body wall thickness
100% Sour Service Readiness → Fully compliant with NACE MR0175 / ISO 15156 standards (Material Classes AA–HH) | Offers outstanding resistance to H2S and CO2 sulfide stress cracking
High Cost-Efficiency & Low TCO → Replaceable choke bean architecture paired with modular trim components | Requires only low-cost bean replacement to restore flow regulation, dramatically reducing total cost of ownership
FAQ-API 6A Fixed Throttle Valve
An API 6A Fixed Throttle Valve utilizes a replaceable ceramic or tungsten carbide choke bean with a pre-calibrated orifice size to establish a precise, constant flow rate and pressure drop. Unlike adjustable choke valves, positive chokes eliminate moving mechanical stem parts in the flow stream, offering superior durability, higher reliability against erosion, and leak-free operation in long-term stable production wells.
JH-Valve choke beans are manufactured using solid tungsten carbide (TC) inserts or high-purity technical ceramics lined inside a heavy-duty alloy sleeve, providing exceptional resistance to sand slurry erosion. Designed with a top-entry bonnet mechanism, field technicians can quickly replace or resize choke beans using standard tools without disconnecting the main body from the choke manifold.
PSL 3G represents the highest quality control tier under API 6A for gas-tight wellhead equipment, mandating rigorous high-pressure gas (Nitrogen) shell and seat testing beyond standard hydrostatic tests. JH-Valve holds official API 6A authorization with PSL 3G capability explicitly scope-covered on our official API certificate. Every PSL 3G valve undergoes in-house gas testing to guarantee zero-leakage gas containment in severe high-pressure gas wells.
PR2 (Performance Requirement Level 2) validates that a valve maintains bubble-tight sealing and smooth operation through dynamic temperature cycles (-46°C to +121°C) under full working pressure (up to 20,000 PSI). JH-Valve’s API 6A qualification scope officially includes PR2 performance validation, backed by certified third-party dynamic cycling test reports to ensure uncompromising reliability under extreme field fluctuations.
Every JH-Valve specified for sour service uses forged body materials and internal trims compliant with NACE MR0175 material limits. We strictly control heat treatment processes (such as double tempering) to maintain material hardness below HRC 22, eliminating the risk of Sulfide Stress Cracking (SSC) and Hydrogen-Induced Cracking (HIC) in high H₂S/CO₂ sour oil and gas environments.
JH-Valve offers full pressure ratings ranging from 2,000 PSI to 20,000 PSI (13.8 MPa to 138.0 MPa) and sizes from 2-1/16″ to 7-1/16″. End connections can be customized to API 6A 6B/6BX flanged ends, API 6A studded connections, or high-pressure hammer union ends (e.g., Fig 1502/2202) according to project specifications.
Yes. JH-Valve wellhead valves, including our fixed throttle valves and choke valves, feature a top-entry architecture. Field technicians can unbolt the top bonnet and extract internal choke beans or seals for fast inspection and replacement without disconnecting the valve body from the manifold line, minimizing field downtime.