3″ – 5000 PSI – BW API 6A DM Mud Gate Valve
Technical Datasheet
- Product Overview
The DM Mud Gate Valve is a high-performance gate valve specifically designed for drilling mud systems in the oil and gas industry. It is designed, manufactured, and tested in strict accordance with API Spec 6A. The valve features a Rising Stem structure and Bi-directional Sealing. The gate is connected to the stem via a T-slot connection, allowing the gate to float within the slot and achieve pressure-energized sealing against the resilient seat inserts on both sides, ensuring bi-directional flow shut-off.
Applications: Drilling mud circulation systems, wellhead equipment, manifolds and flowlines, crude oil and sour gas pipelines, and drilling chemical handling.
- Design Standards & Codes
Item | Standard / Code |
Design, Manufacturing, Testing | API Spec 6A |
Sour Service Design | NACE MR0175 / ISO 15156 |
Body / Bonnet | Forged Steel |
Quality System | API Q1 Compliant |
- Technical Specifications
Tham số | Đặc điểm kỹ thuật |
Kích thước danh nghĩa | 3″ (DN 80) |
Rated Working Pressure | 5000 PSI (35 MPa / 345 bar) |
End Connection | Mối hàn đối đầu (BW) |
Loại van | Mud Gate Valve |
Kết cấu | Rising Stem |
Hoạt động | Manual (Hand Wheel Operated) |
Sealing Type | Metal-to-Rubber / Metal-to-Metal |
Phạm vi nhiệt độ | P-U: -20°F to 250°F (-29°C to 121°C) |
Service Media | Drilling Mud, Water, Natural Gas, Oil, Sour Gas (H₂S/CO₂) |
- API 6A Rating Specifications
Rating Class | Available Range | Sự miêu tả |
PSL (Product Spec Level) | PSL 1, PSL 2, PSL 3 | Defines testing, inspection, and NDE requirements |
PR (Performance Requirement) | PR1, PR2 | PR1: 2 cycles test; PR2: 160 full pressure/temperature cycles test |
Material Class | AA, BB, CC, DD, EE, FF | EE and above suitable for sour service; Ring groove overlay required for > EE |
Temperature Class | K, L, P, R, S, T, U, V | U class covers -18°C to 121°C (-0°F to 250°F) |
- Materials of Construction
5.1 Body Material
- Body & Bonnet: Forged Steel
- Material Class Availability: DD, EE, FF (NACE MR0175 compliant for sour service)
5.2 Trim Materials
- Cổng: Carbon Steel (Electroless Nickel Plated), Monel, Aluminum Bronze, or Nitrided Stainless Steel.
- Ghế: Resilient seal (NBR, CNBR, or HNBR) bonded/embedded in a Stainless Steel or Carbon Steel retainer ring.
- Thân cây: Alloy Steel.
5.3 Seals
- Primary Seal: Metal-to-Rubber (Resilient Seat Insert).
- Body/Bonnet Seal: Metal-to-Metal.
5.4 Material Standards Compliance
- Pressure-containing parts are integral forgings.
- Materials selected per NACE MR0175/ISO 15156 for resistance to sulfide stress cracking.
- Optional hard-facing overlay on sealing surfaces for erosion/corrosion resistance.
- Design Features
Feature | Sự miêu tả |
Double-Start Thread | Fast open/close operation with low torque requirement. |
Rising Stem | Provides clear visual indication of gate position. |
Bi-Directional Sealing | Floating gate design allows pressure-energized upstream/downstream seal. |
Inline Repairable | Bonnet assembly can be removed quickly without removing valve body from pipeline. |
Metal-to-Rubber Sealing | Proprietary seat design ensures drop-tight shut-off. |
Low Operating Torque | Optional ball screw design available. |
- Pressure-Temperature Ratings
Rated Working Pressure: 5000 PSI (35 MPa).
Temperature Class U: -18°C to 121°C (-0°F to 250°F).
Temp. Class | Min. Operating Temp. | Max. Operating Temp. |
K | -60°C (-75°F) | 82°C (180°F) |
L | -46°C (-50°F) | 82°C (180°F) |
P | -29°C (-20°F) | 82°C (180°F) |
U | -18°C (-0°F) | 121°C (250°F) |
V | 2°C (35°F) | 121°C (250°F) |
- Inspection & Testing
8.1 Pressure Testing
Performed in accordance with API 6A:
- Shell Test: Hydrostatic test at 1.5 x Rated Working Pressure.
- Seat Test: Hydrostatic and Gas seat tests (as applicable per PSL).
8.2 Non-Destructive Examination (NDE)
Based on PSL requirements:
- PSL 1: MT or PT.
- PSL 2: MT/PT, sample hardness testing.
- PSL 3/3G: Full volumetric (UT/RT) and full hardness survey.
8.3 Performance Verification (PR2)
Type testing includes:
- Hydrostatic shell test.
- Gas seat test.
- 160 cycle dynamic test (Open/Close) at ambient and rated temperature.
- Torque measurement verification.
- End Connection Details
Tham số | Đặc điểm kỹ thuật |
Connection Type | Mối hàn đối đầu (BW) |
Kích thước danh nghĩa | 3″ (DN 80) |
Schedule / Wall Thickness | XXH (Extra Extra Heavy) |
Other Available Ends | Flanged (RF/RTJ), Threaded (NPT), Hammer Union |
- Dimensions & Weight (Reference)
Tham số | Reference Value |
Face-to-Face Dimension | Per API 6A Standard |
Center to Top (Open) | Consult Manufacturer Drawing |
Hand Wheel Diameter | Consult Manufacturer Drawing |
Approximate Weight | Consult Manufacturer Drawing |
Note: Specific dimensions and weights for the 3″ size are subject to final manufacturer design and certified drawings.
- Optional Configurations
- Sự truyền động: Manual (Std), Gear Operator, Hydraulic, Pneumatic.
- End Connections: BW, Flanged (RTJ/RF), NPT Threaded, Hammer Union.
- Operation Assist: Ball Screw Stem (Reduces torque for high-pressure service).
- Position Indicator: Sight Lens (Protects stem threads from mud/debris).
- Material Upgrade: Higher material classes (EE, FF, HH) for extreme sour/corrosive environments.
- Industry Applications
- Drilling Mud Circulating Systems
- Wellhead & Christmas Tree Assemblies
- High Pressure Manifolds & Flowlines
- Sour Crude Oil & Gas Transmission
- Drilling Chemical Injection Systems
- Ordering Information
Please specify the following when ordering:
- Sự miêu tả: 3″ – 5000 PSI – BW API 6A DM Mud Gate Valve
- Kích cỡ: 3″ (DN 80)
- Xếp hạng áp suất: 5000 PSI
- End Connection: Butt Weld (BW)
- PSL: PSL 1 / PSL 2 / PSL 3
- Material Class: DD / EE / FF
- Temperature Class: U (or as required)
- PR: PR1 / PR2
- Hoạt động: Manual Handwheel
- Quantity
- Quality & Compliance Certifications
- API Spec 6A Monogram License
- API Q1 Quality System Registration
- ISO 9001:2015 Certified
- NACE MR0175 / ISO 15156 Compliance (Sour Service)
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