3-Piece Trunnion Ball Valve— 12″ 600LB RF

Description

Technical Data Sheet – 3-Piece Trunnion Ball Valve

Size: 12″ (DN300) | Pressure Class: 600 LB | End Connection: Raised Face (RF) Flanged
Body Material: ASTM A216 WCB | Construction: 3-Piece Bolted (Center Section + Two End Caps)

1. General Description

The 12″ 600LB 3-Piece Trunnion Ball Valve combines a trunnion-mounted (fixed) ball with a three-piece body design. The center body section houses the ball and seats, while the two end caps are bolted to the center section. This construction allows in-line maintenance – the center section can be removed without unbolting the pipeline flanges.

The WCB carbon steel body provides excellent strength for high-pressure service, while the trunnion design ensures low operating torque and bidirectional bubble-tight shut-off. Suitable for oil & gas pipelines, refineries, petrochemical plants, high-pressure water, and steam systems.

2. Key Design Features

Feature Description
Body Construction 3‑piece bolted (two end caps + center body)
Ball Type Trunnion mounted (fixed ball) – bidirectional
Seat Design Spring‑energized / pressure‑assisted seats (double piston effect optional)
Stem Design Blowout‑proof, anti‑static grounding, low emission packing available
End Connections Raised Face (RF) flanges per ASME B16.5 Class 600
Fire Safety API 607 / ISO 10497 certified (optional)
Operation Gear operator (standard for 12″) – manual lever not feasible due to torque
Maintenance Center section removable without disturbing pipeline flanges
3. Applicable Standards

Parameter Standard
Design & Manufacture API 6D, ASME B16.34
Face‑to‑Face Dimension ASME B16.10 (long pattern)
Flange Dimensions ASME B16.5 Class 600 RF
Pressure‑Temperature Rating ASME B16.34 (Group 1.1 – WCB)
Testing & Inspection API 598 (zero leakage)
Marking MSS SP‑25
Fugitive Emissions (optional) ISO 15848‑2
4. Material Specification (WCB Body – Standard Option)

Component Material Remarks
Body (center & end caps) ASTM A216 WCB Carbon steel
Ball ASTM A182 F316 Stainless steel
Trunnion / Stem ASTM A182 F316 Stainless steel
Seats PTFE (virgin or glass‑filled) PEEK for high temperature
Seat Springs Inconel X‑750 or SS316 –
Stem Bearings PTFE + bronze Carbon graphite optional
Packing Graphite (low emission) Live‑loaded optional
Gaskets Spiral wound (graphite + SS316) –
Bolting (studs & nuts) ASTM A193 B7 / A194 2H –
Coating Epoxy, blue RAL 5005 3‑layer offshore coating optional
*For NACE MR0175 / ISO 15156 sour service, specify WCB with proper hardness control and trim upgrades.*
5. Pressure‑Temperature Ratings (WCB Body – ASME B16.34 Group 1.1, Class 600)

Temperature Max Working Pressure
-20 to 100°F (-29 to 38°C) 1480 psig (102 bar)
200°F (93°C) 1350 psig (93 bar)
300°F (149°C) 1235 psig (85 bar)
400°F (204°C) 1130 psig (78 bar)
500°F (260°C) 1015 psig (70 bar)
⚠️ PTFE seats limit max temperature to 400°F (204°C). For higher temperatures, specify PEEK seats or metal‑seated design.
6. Dimensions & Weight (12″ Class 600 RF, Gear Operated)

Parameter Value
Face‑to‑Face (L) per ASME B16.10 762 mm (30.0 in)
Total Height – Open (H – body only) ≈ 700 mm (27.6 in)
Center to Top of Gear ≈ 520 mm (20.5 in)
Flange O.D. (12″ Class 600 RF) 527 mm (20.75 in)
Bolt Circle Diameter 483 mm (19.0 in)
Number of Bolt Holes 16
Bolt Hole Diameter 35 mm (1.38 in)
Approx. Weight – Bare Valve (WCB) 650 kg (1433 lb)
Weight with Gear Operator ≈ 730 kg (1610 lb)
Dimensions and weight are typical for a 3‑piece design. Weight slightly higher than 2‑piece due to additional bolting and flanges.
7. Flow Coefficient (Cv)

Port Type Cv (Water @ 60°F, 1 psi ΔP)
Full Port (12″ bore) ≈ 3200 – 3500
Reduced Port (optional) ≈ 1800 – 2200
Full port recommended for low pressure drop and pigging applications.
8. Operating Torque & Gear Operator (12″ Class 600, PTFE seats)

Service Condition Break Torque (in‑lbs / Nm) Running Torque (in‑lbs / Nm) Recommended Gear Ratio
Clean liquid/gas at 600 psi 10,000 in‑lbs (1130 Nm) 7,000 in‑lbs (791 Nm) 70:1
At full diff. pressure (1480 psi) 15,500 in‑lbs (1750 Nm) 10,500 in‑lbs (1186 Nm) 100:1
Standard gear operator is sized for at least 1.3× break torque at maximum differential pressure. Electric or pneumatic actuators available upon request.
9. Testing per API 598

Test Pressure Duration Acceptance
Shell Hydrostatic 1.5 × rating (2220 psig) 3 min No visible leakage
High‑Pressure Seat (water) 1.1 × rating (1628 psig) 3 min Zero bubbles
Low‑Pressure Air Seat 90 psig (0.6 MPa) 2 min Zero bubbles
10. Advantages of 3-Piece Design for 12″ Class 600

Feature Benefit
Center section removable In‑line maintenance without disturbing pipe flanges – critical for large bore, heavy valves
Replaceable seat & seal kit Lower spare part inventory and faster service
End caps remain bolted to pipeline No pipe realignment or flange gasket replacement needed after maintenance
Independent end cap materials Allows different flange materials (e.g., stainless end caps with carbon steel center)
Easier actuator mounting Center section can be rotated for optimal actuator orientation
11. Optional Upgrades & Accessories

Option Description
Fire‑safe design API 607 / ISO 10497 certified
Low emission packing ISO 15848‑2 (fugitive emissions control)
NACE MR0175 / ISO 15156 Sour service (H₂S / CO₂)
Metal seats For high temperature (up to 500°F+), high cycle, or abrasive media
Double piston effect (DPE) seats Provides absolute bidirectional sealing against full pressure
Extended stem For buried or insulated pipeline service
Locking device Padlockable gear operator
Limit switches Open/close position feedback
Electric or pneumatic actuator Complete automated valve package
12. Marking (per MSS SP‑25 & API 6D)

Manufacturer’s name / logo
12″ – 600 LB
Body material: WCB
API 6D
Heat number
Flow direction arrow (bidirectional – arrow for reference)
Pressure rating (1480 CWP)
13. Ordering Information

To order a 12″ Class 600 LB 3‑Piece Trunnion Ball Valve – WCB Body, please specify:

Valve size: 12″ (DN300)
Pressure class: 600 LB
Body material: ASTM A216 WCB
End connection: Raised Face flanges ASME B16.5 (RTJ optional)
Seat material: PTFE (standard) / PEEK / Metal‑seated
Port type: Full port (standard) / Reduced port
Operation: Gear operator (standard for 12″)
Fire‑safe certified: Yes / No
NACE MR0175 (sour service): Yes / No
Optional accessories: Locking device, limit switches, low emission packing, actuator mounting kit
14. Important Notes

Trunnion design provides low torque and long life under high differential pressure – essential for 12″ Class 600 applications.
3‑piece body allows quick access to internals without removing the valve from the pipeline – unbolt the center body from the end caps.
For steam service >200°C, replace PTFE seats with PEEK or metal seats with graphite gaskets.
Always request certified dimensional drawing and torque data from the manufacturer, as 12″ Class 600 valves are heavy and require proper handling.
Disclaimer: This data sheet provides typical values for a 12″ Class 600 3‑piece trunnion ball valve with WCB body. Final dimensions, weight, torque, and material certifications may vary by manufacturer. Always refer to certified manufacturing drawings and test reports.

Issued by: [Your Company Name]
Revision: 1.0 / Date: [Current Date]

Let me know if you need a version with web body or reduced port dimensions.