TECHNICAL DATA SHEET
Product: 3-Piece Trunnion Mounted Ball Valve – Metal Seated
Kích cỡ: 4″ x 3″ (Reducer Bore / Reduced Port)
Cấp áp suất: Class 1500
Vật liệu thân máy: F316L (ASTM A182 F316L)
Seat Type: Metal‑to‑Metal Seated
Design: 3-Piece Body, Trunnion Ball
- Basic Specifications
Tham số | Value |
Kích thước danh nghĩa | 4″ x 3″ (End Connections: 4″ / Bore: 3″) |
Xếp hạng áp suất | Class 1500 (PN 250) |
Loại van | Van bi gắn trục |
Cấu trúc thân máy | 3-Piece (End Caps + Center Body) |
End Connections | Flanged – ASME B16.5 Class 1500 (RF or RTJ) |
Seat Type | Metal‑to‑Metal (Hardfaced) |
Phạm vi nhiệt độ | –29°C ~ +500°C (depending on hardfacing material) |
Suitable Media | High‑temperature steam, thermal oil, abrasive slurries, corrosive fluids, high‑pressure gas/liquid |
Fire Safe Design | API 607 / ISO 10497 (inherently fire‑safe) |
- Main Features
- Trunnion Mounted Ball: Ball is supported by upper and lower trunnion bearings, reducing operating torque and ensuring smooth operation under high differential pressure. Ideal for large sizes and high‑pressure applications.
- Reduced Bore (4″ x 3″): 4″ flanged connections with a 3″ internal bore reduces weight and cost while maintaining adequate flow capacity.
- 3-Piece Body Construction: Center body with bolted end caps allows easy in‑line maintenance – seats, ball, and seals can be accessed without removing the entire valve from the pipeline.
- Metal‑to‑Metal Seating: Ball and seats are hardfaced with wear‑resistant alloys (e.g., tungsten carbide, chromium carbide, or Stellite). Provides exceptional durability in high‑temperature, abrasive, and erosive services.
- Spring‑Loaded Seats: Metal seats are typically pre‑loaded with Inconel springs to maintain continuous contact with the ball, ensuring tight shut‑off even under low pressure or thermal cycling.
- Double Block & Bleed Capability: With two independent metal seats, the cavity between seats can be vented or monitored.
- Anti‑Static Device: Ensures electrical continuity between ball, stem, and body.
- Blowout‑Proof Stem: Stem is designed to prevent ejection under pressure.
- Material List (Metal Seated Configuration)
Item | Part | Vật liệu |
1 | Body (Center) | F316L (ASTM A182 F316L) |
2 | End Caps (2 pcs) | F316L (ASTM A182 F316L) |
3 | Quả bóng | F316L + Tungsten Carbide (WC) Coating / Chromium Carbide (CrC) Coating |
4 | Seat Rings (2 pcs) | F316L + Stellite 21 Hardfacing |
5 | Thân cây | F316 / 17-4PH / Inconel 718 |
6 | Trunnion Bearings | Reinforced PTFE / Carbon Graphite / Metal‑lined |
7 | Stem Packing | Flexible Graphite + Braided Graphite |
8 | Body Gaskets | Spiral Wound, F316L + Graphite |
9 | Bolting | A193 B8M / A194 B8M (316 stainless steel) |
10 | Seat Springs | Inconel X‑750 / Inconel 718 |
Note: Hardfacing materials can be customized based on media and temperature (e.g., Stellite 6, Stellite 21, tungsten carbide).
- Hardfacing Options for Metal Seats
Hardfacing Material | Hardness (HRC) | Max Temperature | Typical Application |
Tungsten Carbide (WC) | 65 – 72 | ~400°C | Severe abrasive service, slurry, sand |
Chromium Carbide (CrC) | 58 – 65 | ~800°C | High‑temperature, moderate abrasion |
Stellite 21 | 35 – 45 | ~650°C | General high‑temperature, corrosion, galling resistance |
Stellite 6 | 38 – 48 | ~800°C | High‑temperature steam, thermal oil |
- Dimensions & Structural Data (Flanged Ends)
Tham số | Value |
Face‑to‑Face Length (L) | ~483 mm (per ASME B16.10 for Class 1500, 4″ valve) |
Flange Standard | ASME B16.5 Class 1500 |
Flange Facing | Raised Face (RF) or Ring Type Joint (RTJ) |
Bore Diameter (Reduced) | 3″ (DN80) – approximately 76 mm |
End Connection Size | 4″ (DN100) flanged |
Approx. Weight | ~190 – 260 kg (depending on configuration) |
Operating Torque | ~600 – 1200 N·m (metal seated, trunnion type) |
Note: Final dimensions to be confirmed by manufacturing drawings.
- Design & Testing Standards
Item | Tiêu chuẩn |
Design & Manufacture | API 6D, API 608, ASME B16.34 |
Flanged End Connections | ASME B16.5 Class 1500 |
Pressure‑Temperature Rating | ASME B16.34 |
Fire Safe Test | API 607 or API 6FA (metal seated inherently fire‑safe) |
NACE Compliance | NACE MR0175 / ISO 15156 (optional) |
Pressure Testing | API 598 or ISO 5208 |
Low‑Pressure Air Test | 0.6 MPa (6 bar) – metal seated: acceptable leakage per API 598 (typically ≤ 10‑20 ml/minute/inch of seat diameter) |
High‑Pressure Hydrostatic Test | 1.5 × rated pressure (body), 1.1 × rated pressure (seat) |
- Metal Seated vs. Soft Seated Comparison
Feature | Metal Seated | Soft Seated (PTFE/PEEK) |
Phạm vi nhiệt độ | –29°C ~ +500°C | –196°C ~ +260°C |
Leakage Rate | API 598 Class V / VI (low but not bubble‑tight) | Bubble‑tight (zero leakage) |
Abrasion Resistance | Excellent | Poor |
Fire Safety | Inherently fire‑safe | Requires fire‑safe design (API 607) |
Torque | Higher | Lower |
Suitable Media | Abrasive, high‑temp, steam, slurry | Clean fluids, cryogenic, chemicals |
- Operating Torque & Actuator Sizing
- Higher Torque Requirement: Metal seated valves require significantly higher torque than soft seated valves due to metal‑to‑metal contact and spring preload.
- Trunnion Advantage: Despite higher torque, the trunnion design reduces torque compared to a floating ball of the same size.
- Safety Factor: Actuator output torque should be at least 1.3 – 1.5 times the maximum measured valve torque.
- Breakaway Torque: Especially critical after prolonged closure; may be higher than running torque.
- Typical Applications
- High‑Temperature Processes: Refinery thermal cracking units, FCCU slurry, steam systems up to 500°C.
- Abrasive Media: Catalyst lines, mining slurries, sand handling.
- Sour Service: With NACE MR0175 materials, suitable for high‑pressure sour gas.
- Offshore & Subsea: Corrosion‑resistant F316L with metal seats for reliability in demanding environments.
- Chemical Processing: Handling corrosive fluids at elevated temperatures.
- Ordering Information
When ordering, please specify:
- Size: 4″ x 3″ (Reduced Bore)
- Pressure Class: Class 1500
- Body Material: F316L
- Seat Type: Metal Seated (specify hardfacing: WC / CrC / Stellite)
- End Connections: Flanged – ASME B16.5 Class 1500 (RF or RTJ)
- Optional Features: NACE MR0175, cryogenic trim (if required), spring‑loaded seats, actuator mounting
This data sheet reflects the metal seated configuration for the 4″ x 3″ – 1500LB F316L 3-Piece Trunnion Ball Valve. For full bore versions, soft seated options, or additional customizations, please contact us with your specific requirements.
CAM KẾT:
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