API 6A Standard Mud Gate Valve
Nominal Sizes: 2″, 3″, 4″, 5″ (DN50 to DN125)
Working Pressure Ratings: 2,000 PSI, 3,000 PSI, 5,000 PSI, 7,500 PSI (13.8 MPa to 51.7 MPa)
Product Specification Levels (PSL): PSL 1, PSL 2, PSL 3
Performance Requirement Levels (PR): PR 1, PR 2
Material Classes: AA, BB, CC, DD, EE, FF (Fully compliant with NACE MR0175 / ISO 15156)
Temperature Ratings: P, R, S, T, U, V (-29°C to +121°C)
Conexiones finales: Hammer Union (Fig 1502/602), API 6A Flanged, Threaded (NPT), Butt-Weld
API 6A Standard Mud Gate Valve
Definición del producto y misión de seguridad:
Serving as the primary fluid isolation valve across drilling mud circulation systems, standpipe manifolds, and mud pump discharge lines, the JH Standard Mud Gate Valve ensures zero-leakage control. Engineered for sand-laden drilling fluids, its heavy-duty elastomeric seat cushion envelops trapped solids to deliver bidirectional bubble-tight sealing under both high and low differential pressures.
JH-Valve Mud Gate Valve Technology Core:
- Resilient Elastomer Cushion Sealing: Nitrile (NBR) or HNBR elastomer cushion encapsulates solids, providing bidirectional zero-leakage shutoff.
- Top-Entry Fast Inline Servicing: Top-entry architecture allows fast replacement of gates and seat cushions in minutes without removing the body.
- Hard-Coated Wear-Resistant Gate: Hard-chrome or Tungsten Carbide coated gate reduces torque and combats severe slurry erosion.
- 100% NACE MR0175 Compliant: High-strength alloy architecture guarantees complete resistance to Sulfide Stress Cracking (SSC) in sour drilling operations.
- Resilient Mud Sealing
- Fast Field Servicing
- API 6A & NACE Standards
Engineered for highly abrasive drilling fluids, cementing slurries, and severe mud pump discharge pressures with complete fluid containment.
Características principales:
▌ Resilient Elastomer Seat Cushion → Heavy-duty vulcanized NBR or HNBR bonded seat sleeve | Encapsulates sand particles during gate closure to prevent seat scoring and deliver absolute bidirectional zero-leakage shutoff
▌ Hard-Coated Chrome Gate → Precision-ground alloy gate plated with heavy hard chrome or Tungsten Carbide | Drastically minimizes friction against the rubber seat cushion, dramatically extending sealing element service life
▌ Self-Cleaning Cavity Design → Optimized lower body channel with gate scraping action | Automatically wipes away accumulated mud solids and sand deposits during closure, preventing bottom-cavity jamming
Provides a top-entry modular architecture and fast field replacement solutions to eliminate costly drilling downtime.
Características principales:
▌ Top-Entry Inline Maintenance → Designed with accessible bonnet bolting and a modular internal cartridge | Allows field personnel to replace seat cushions and gates within minutes without removing the body from the manifold
▌ Indicador de posición visual → Transparent protective sleeve housing a highly visible stem indicator | Enables operators to confirm full open/closed valve status at a glance from a distance to prevent accidental misoperation
▌ Versatile End Connections → Available with Fig 1502/602 Hammer Unions, API 6A Flanges, and Butt-Weld ends | Fully compatible with Demco, OTECO, and other standard global drilling mud systems and standpipe manifolds
Complies with strict quality control and corrosion standards required for high-pressure onshore and offshore mud loops.
Características principales:
▌ API 6A PSL 3 Manufacturing Rigor → 100% volumetric NDE on body castings/forgings with high-pressure hydrostatic testing | Guarantees internal structural soundness capable of enduring violent mud pump pressure pulsations
▌ PR2 Performance Verification → Validated under API 6A PR2 dynamic pressure cycling and thermal endurance tests | Maintains smooth actuation and bubble-tight seal integrity up to 7,500 PSI across -29°C to +121°C
▌ 100% NACE MR0175 Sour Service Readiness → Forged/cast construction across API Material Classes AA–FF | Provides total immunity to Sulfide Stress Cracking (SSC) in aggressive sour drilling environments containing H2S and CO2
Diseño principal y ventajas
- Resilient Elastomer Cushion Sealing → Heavy-duty Nitrile (NBR) or Highly Saturated Nitrile (HNBR) bonded seat cushion | Encapsulates sand particles during closure to deliver reliable bidirectional zero-leakage shutoff under both high and low differential pressures
- Top-Entry Fast Inline Servicing → Designed with a bonnet-guided top-entry body architecture | Permits full replacement of internal seat cushions and gates within minutes without removing the valve body from the manifold
- Hard-Coated Wear-Resistant Gate → Precision-ground alloy gate plated with heavy hard chrome plating or Tungsten Carbide | Drastically reduces operating torque, combats fluid erosion, and extends cycle life in abrasive mud service
- Visual Position Indicator & Self-Cleaning Cavity → Features a transparent sleeve with a visible stem indicator and bottom-cavity scraping action | Enables at-a-glance status checks while automatically clearing sand and mud deposits during closure
- Strict PSL 3 & PR2 Level Integrity → Built to rigorous API 6A PSL 1–3 standards and validated by PR2 dynamic performance cycling | Guarantees zero-leakage sealing and structural integrity up to 7,500 PSI across -29°C to +121°C
- 100% Severe Sour Service Readiness → Fully compliant with API Material Classes AA–FF and NACE MR0175 / ISO 15156 standards | Provides complete immunity to Sulfide Stress Cracking (SSC) in aggressive H2S/CO2 sour drilling environments
API-API 6A Standard Mud Gate Valve
The JH Standard Mud Gate Valve utilizes a heavy-duty elastomer-molded seat insert (HNBR or NBR bonded to steel wear rings) that absorbs micro-particles and abrasives without destroying the seal face. As the slab gate slides into position, the resilient seat creates a continuous, high-integrity pressure barrier under working pressures up to 7,500 PSI, making it the ideal choice for mud pump manifolds, standpipe lines, and drilling fluid circulation systems.
Built with a user-friendly top-entry body architecture and replaceable one-piece seat assemblies, operators can complete routine seat and gate inspections or replacements in minutes without unbolting the valve body from the mud line. Combined with an anti-blowout stem design and visual open/close position indication, downtime during critical drilling operations is kept to an absolute minimum.
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 standard mud gate valves and choke valves, feature a top-entry architecture. Field technicians can unbolt the top bonnet assembly and extract internal gates, elastomer seats, or stem components for fast inspection and replacement without disconnecting the valve body from the manifold line, minimizing field downtime.