API 6A Cage Throttle Valve
Nominal Diameter: 2-1/16″ – 7-1/16″ (DN50 – DN180)
Working Pressure: 2,000 PSI – 15,000 PSI (13.8 MPa – 103.5 MPa)
Specification & Performance: PSL 1 – PSL 3G | PR1, PR2
Temperatura de funcionamiento: -29°C to 121°C (API Temp Rating K – U)
Material Class: AA, BB, CC, DD, EE, FF, HH (Per API 6A / NACE MR0175)
Design Standards: API 6A, API Spec 16C, ASME B16.34, ISO 10423
Conexión: API Flange (6B/6BX RTJ), Hammer Union, Threaded
Drive Mode: Manual (Handwheel/Gear), Pneumatic, Hydraulic
API 6A Cage Throttle Valve
Definición del producto y misión de seguridad:
Engineered for high-pressure, high-differential, and abrasive wellhead service, the API 6A Cage Throttle Valve features a multi-hole cage and pressure-balanced trim design. By shifting fluid throttling shear zones into the cage core, it eliminates cavitation, erosion, and vibration, delivering precise flow control and zero-leakage protection up to 15,000 PSI.
JH-Valve Cage Throttle Technology Core:
- Multi-Stage Anti-Cavitation Trim: CFD-optimized cage design | Reduces fluid velocity and noise by ≥ 30 dB (Per API 6A / API Spec 16C)
- Ultra-Hard Anti-Erosion Trim: Stellite / Tungsten Carbide overlay or sleeve | Surface hardness ≥ 62 HRC (Resists severe sand slurry erosion)
- Severe Sour Service Metallurgy: API Material Classes AA–HH | 100% compliant with NACE MR0175/ISO 15156 H2S cracking standards
- Certified Low Fugitive Emissions: Pressure-energized packing system | Fully certified to API 624 and ISO 15848-1 leakage standards
- Jaula anticavitación
- Pressure-Balanced Trim
- NACE & Low-Emission
Engineered for high differential pressure and abrasive wellhead service, JH utilizes CFD-optimized cages with Tungsten Carbide sleeves to shift fluid shear into the core, eliminating cavitation and severe vibration.
Características principales:
▌ Multi-Stage Anti-Cavitation Cage → CFD-optimized topology | Reduces fluid velocity and noise by ≤ 30 dB, protecting the body from erosion
▌ Ultra-Hard Tungsten Carbide Sleeve → Surface hardness ≥ 62 HRC | Resists severe sand slurry and frac-fluid erosion
▌ Core Energy Dissipation → Controls throttling shear in the cage center | Prevents destructive vibration and flashing cavitation
To ensure effortless operation under differential pressures up to 15,000 PSI, JH features a pressure-balanced trim design that drastically reduces operating torque and prevents stem binding.
Características principales:
▌ Internal Pressure-Balance Channels → Equalizes fluid forces across the trim | Reduces operating torque by > 50% for multi-actuator adaptability
▌ Anti-Binding Precision Guidance → Mirror-polished stem & guide sleeves | Eliminates stem seizing under high differential pressure and scaling
▌ Micron-Precision Flow Control → High-response balanced trim | Delivers smooth, linear, and highly repeatable wellhead flow regulation
Built for sour environments and environmental compliance, JH cage throttle valves feature NACE MR0175 compliant metallurgy and zero-emission stem seals.
Características principales:
▌ NACE Sour Service Metallurgy → Complies with NACE MR0175/ISO 15156 | Offers Class HH materials for severe H₂S/CO₂ corrosion
▌ Pressure-Energized Packing System → Live-loaded spring compensation | Maintains reliable stem sealing during frequent dynamic cycling
▌ Certified Low Fugitive Emissions → Fully certified to API 624 & ISO 15848-1 | Ensures zero-leakage safety under harsh wellhead service
Diseño principal y ventajas
- Erosion-resistant materials → High-pressure & abrasive service materials | Treated with quenching and tempering to boost yield strength, eliminating high-pressure shear and particle erosion
- Long-term maintenance-free → High reliability lifespan design | Key components engineered for a service life of ≥ 10 years, significantly reducing wellhead TCO
- Zero leakage from hard sealing → Hard-faced carbide sealing surface | Tungsten/Cobalt-based carbide overlay meets API 624 & ISO 15848-1 fugitive emission standards (≤ 10⁻⁶ mg/s·m)
- Anti-cavitation cage design → CFD-optimized multi-stage cage | Shifts fluid shear to the center, eliminating cavitation, flashing, and vibration noise (≤ 30 dB)
- Pressure-balanced trim → Internal pressure-equalizing channels | Reduces operating torque by > 50%, completely preventing stem binding under high differential pressure
- Precise flow regulation → High-response adjustable choke mechanism | Enables micron-level linear adjustment of flow rate and pressure drop, with anti-blowout stem protection
FAQ-API 6A Cage Throttle Valve
The cage-and-plunger mechanism directs high-velocity fluid jets inward to collide with each other inside the center of the heavy-duty tungsten carbide cage rather than impinging on the valve body wall. This effectively dissipates energy, suppresses cavitation noise and vibration, and prevents severe trim erosion, significantly extending operational life in abrasive, high-differential pressure choke manifolds.
Our cage choke trims are manufactured with solid, high-density Tungsten Carbide (TC) inserts or ceramics engineered for extreme hardness (≥ 88 HRA). The protective outer sleeve and body internals are made from forged alloy steel with corrosion-resistant claddings (such as Inconel 625), ensuring maximum resistance against frac sand, proppant wear, and high-velocity slurry flowback.
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 cage throttle valves and check valves, feature a top-entry architecture. Field technicians can unbolt the top bonnet and extract internal trims, plungers, or cages for fast inspection and maintenance without disconnecting the valve body from the manifold line, minimizing field downtime.