API 6A Hard-Seal Mud Gate Valve
Nominal Sizes: 2″ to 5″ (e.g., 2-1/16″, 3-1/8″, 4-1/16″, 5-1/8″)
Working Pressure Ratings: 3,000 PSI to 15,000 PSI (20.7 MPa to 103.5 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)
Verbindingen beëindigen: API 6A Flanged, Hammer Union (FIG 1502/1002), Clamp Hub, or Threaded (LP)
API 6A Hard-Seal Mud Gate Valve
Productdefinitie en veiligheidsmissie:
Serving as the primary shut-off valve across high-pressure mud circulation, cementing, and fracturing manifolds, the JH Hard-Seal Mud Gate Valve handles heavy abrasive slurries. Utilizing precision-lapped metal-to-metal seating, it eliminates elastomer seat degradation, delivering long-term seal integrity under extreme drilling and stimulation pressures up to 15,000 PSI.
JH-Valve Hard-Seal Mud Gate Valve Technology Core:
- HVOF Tungsten Carbide Hard-Facing: Gate and seat faces coated with hard-facing alloy (Hardness ≥ 60 HRC) resist frac sand, barite, and drill cuttings.
- Metal-to-Metal Sealing Integrity: Precision-lapped metal-to-metal seating completely eliminates elastomer seat washouts to ensure reliable shut-off.
- PSL 3G & PR2 Certified Integrity: Manufactured to API 6A PSL 3/3G standards and PR2 validated, ensuring zero-leakage from -46°C to +121°C.
- 100% NACE MR0175 Compliant:High-strength alloy construction offers total immunity to H2S/CO2 Sulfide Stress Cracking (SSC) in sour drilling fluids.
- Erosion Resistant
- Field Maintenance
- PSL 3G & PR2
Engineered for high-pressure mud circulation and heavy sand fracturing, the JH Hard-Seal Mud Gate Valve utilizes a high-hardness metal-to-metal seating architecture to eliminate elastomer washout.
Kernkenmerken:
▌ HVOF Tungsten Carbide Coating → Surface hardness on gate and seat sealing faces ≥ 60 HRC | Provides superior resistance against aggressive erosion from high-velocity slurry and frac sand
▌ Full-Bore Flow Path → Bore diameter completely aligns with the connecting pipeline | Minimizes fluid turbulence and pressure drop, significantly extending valve body service life
▌ Metal-to-Metal Sealing Integrity → Precision-lapped metal-to-metal seating technology | Eliminates reliance on vulnerable rubber seals, ensuring tight shut-off under severe pressure differential
Engineered for rugged oilfield operations and rapid field servicing, featuring a compact body structure with easily inline-replaceable trim components.
Kernkenmerken:
▌ Replaceable Hard-Faced Seats → Modular seat assembly architecture | Enables rapid inline inspection and replacement of gate and seat components, drastically reducing non-productive time (NPT)
▌ Anti-Blowout Stem & Back-Seat → Integrated stem back-seat sealing mechanism | Allows safe online inspection and packing adjustment while the valve remains under pressure
▌ Versatile High-Pressure Connections → Options including API Flanges, Hammer Unions (FIG 1502/1002), and Clamp Hubs | Seamlessly integrates into diverse drilling mud manifolds and cementing setups
Fully compliant with stringent global procurement standards for deep-well, ultra-high pressure drilling and cementing operations.
Kernkenmerken:
▌ PSL 3 / PSL 3G Manufacturing Standard → 100% volumetric NDE and high-pressure gas testing | Ensures zero internal material defects for critical offshore and onshore drilling rigs
▌ PR2 Performance Verification → Fully validated under API 6A PR2 dynamic thermal and pressure cycling | Guarantees reliable seal integrity across extreme temperatures (-46°C to +121°C)
▌ 100% NACE MR0175 Compliance → Forged construction across API Material Classes AA–HH | Completely prevents Sulfide Stress Cracking (SSC) in hostile H2S/CO2-bearing drilling fluids
Kernontwerp en voordelen
- HVOF Tungsten Carbide Hard-Facing → Gate and seat sealing faces hard-faced via high-velocity oxy-fuel spraying (Hardness ≥ 60 HRC) | Provides unparalleled resistance against extreme erosion from heavy barite, drill cuttings, and frac sand
- Metal-to-Metal Hard Seating Integrity → Precision-lapped gate and floating seats | Completely eliminates traditional elastomer seat washout and degradation, delivering reliable, high-pressure zero-leakage shut-off
- Strict PSL 3G & PR2 Level Integrity → Built to rigorous API 6A PSL 3 / PSL 3G standards and PR2 performance specifications | Guarantees absolute sealing integrity under severe thermal (-46°C to +121°C) and pressure cycling conditions
- Anti-Blowout Stem with Back-Seat Sealing → Integrated mechanical back-seat stem structure | Enables safe online packing inspection and adjustment while the valve remains energized under working pressure
- 100% Severe Sour Service Readiness → Fully compliant with NACE MR0175 / ISO 15156 standards (API Material Classes AA–HH) | Provides exceptional resistance to H2S and CO2 sulfide stress cracking in corrosive drilling muds
- Rapid Field Serviceability → Modular inner trim and compact body architecture | Allows inline inspection and quick replacement of gates and seats without removing the valve body from the manifold, drastically reducing non-productive time (NPT)
FAQ-API 6A Hard-Seal Mud Gate Valve
The JH Slab Gate Valve features a solid, single-piece slab gate combined with floating metal-to-metal seat rings. Line pressure automatically forces the gate tightly against the downstream seat ring regardless of flow direction, achieving a continuous, bubble-tight seal. This simple yet robust design reduces wear, prevents sediment buildup in the body cavity, and guarantees dependable bi-directional shut-off up to 20,000 PSI.
The sealing faces of both the slab gate and floating seats are coated with Stellite or HVOF-sprayed Tungsten Carbide hard-facing (Hardness ≥ 60 HRC). Coupled with a stem featuring non-rising / rising anti-blowout engineering and stem-backseat sealing capability, the valve can be repacked under full working pressure, drastically minimizing maintenance hazards and extending operational life in harsh fracturing and production environments.
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 slab gate valves and choke valves, feature a top-entry architecture. Field technicians can unbolt the top bonnet and extract internal gates, stem assemblies, or floating seats for fast inspection and replacement without disconnecting the valve body from the manifold line, minimizing field downtime.