2-Piece Trunnion Ball Valves—600LB

Description

Technical Data Sheet

2-Piece Trunnion Ball Valves – Cast Body
Pressure Class: 600LB
Design: Side Entry, Trunnion Mounted, Full/Reduced Bore

1. General Description

This series of two-piece, side-entry, trunnion-mounted ball valves features a cast body and utilizes the trunnion principle, where the ball is supported by bearings at both the top and bottom. This design significantly reduces operating torque and seat wear compared to floating ball valves, especially in larger sizes and higher pressure classes such as Class 600. The valves are available with a variety of trim and seal options, making them suitable for a wide range of applications including oil and gas, petrochemical, power generation, and general industrial services. Standard end connections are flanged RF and RTJ. They can be supplied with lever, gear, or actuators.

2. Design Codes & Standards

Item Applicable Standard
Design & Manufacture API 6D, ASME B16.34, API 608
Pressure-Temperature Rating ASME B16.34
Flanged Ends (RF/RTJ) ASME B16.5
Butt-Weld Ends (if applicable) ASME B16.25
Face-to-Face Dimensions ASME B16.10 (Long Pattern)
Inspection & Testing API 6D, API 598
Fire-Safe Design API 607 / ISO 10497
Fugitive Emissions (Optional) ISO 15848-1 / API 622
Casting Standards ASME B16.34 / applicable ASTM
3. Main Technical Specifications

Size Range: 2″ to 48″ (DN50 – DN1200); larger on request
Pressure Class: Class 600 (600LB)
Bore Type: Full Bore (standard) / Reduced Bore
End Connections: Raised Face (RF), Ring Type Joint (RTJ), Butt-Weld (BW), or combinations
Body/Bonnet Material (Cast):

Carbon Steel: ASTM A216 WCB / WCC
Low-Temp Carbon Steel: ASTM A352 LCB / LCC
Stainless Steel: ASTM A351 CF8 / CF8M / CF3 / CF3M
Duplex/Super Duplex: ASTM A890 4A (CD3MN), A995 5A (CE3MN)
Other alloys upon request
Ball Material: A105/ENP (Electroless Nickel Plating), F6a, SS316, F51, Inconel, or with hard chrome / tungsten carbide coating
Seat Design: Single Piston Effect (SPE) or Double Piston Effect (DPE)
Seat Material: Nylon, Devlon, PTFE, RPTFE, PEEK, or Metal
Stem Material: ASTM A276 410 / 17-4PH / F51 / F316
Packing & Seals: Graphite, PTFE, or a combination; O-rings in FKM, HNBR, FFKM
Operation: Wrench (up to 4″), Manual Gear Operator (from 6″), Pneumatic/Electric/Hydraulic actuators readily mountable via ISO 5211 pad
Standard Design Features:

Trunnion mounted ball with upper and lower bearing supports
Blow-out proof stem
Antistatic device (ball-stem-body)
Fire-safe certified construction
Self-relieving seats (cavity overpressure relief to upstream/downstream depending on SPE/DPE)
Emergency seat sealant injection fittings available
Cavity vent/drain connection available
4. Materials of Major Parts (Typical WCB / SS Trim)

No. Part Name Carbon Steel Option Stainless Steel Option Standard
1 Body A216 WCB A351 CF8M ASTM A216 / A351
2 Bonnet A216 WCB A351 CF8M ASTM A216 / A351
3 Ball A105 + ENP A182 F316 + HCC ASTM A105 / A182
4 Seat Ring Devlon / RPTFE Devlon / PEEK —
5 Stem A276 410 / 17-4PH A182 F316 / A564 17-4PH ASTM A276 / A182
6 Bearing (Stem/Ball) SS316 + PTFE SS316 + PTFE —
7 Packing Graphite Graphite —
8 Body Gasket Spiral Wound 316L+Graphite Spiral Wound 316L+Graphite ASME B16.20
9 Stud A193 B7 A193 B8M ASTM A193
10 Nut A194 2H A194 8M ASTM A194
11 Gear Operator Ductile Iron, Epoxy Painted Ductile Iron, Epoxy Painted ISO 5211
5. Performance Testing & Quality Assurance

Hydrostatic Shell Test: 1.5 × Class 600 rated (approx. 1500 psig / 103.4 bar water), per API 6D.
Hydrostatic Seat Test: 1.1 × Class 600 rated (approx. 1100 psig / 75.8 bar water), zero leakage.
Low-Pressure Seat Test: 0.6 bar pneumatic, zero leakage.
Fire-Safe Test: Per API 607 / ISO 10497, ensuring seating integrity before, during, and after burn.
Cryogenic/Low-Temperature Test (optional): For LCB/LCC or CF8M valves, per BS 6364.
PMI & NDE: Positive Material Identification, Liquid Penetrant and Ultrasonic inspection on castings as per specification. EN 10204 Type 3.1 certification.
6. Installation & Maintenance Tips

Trunnion Support: Ensure the valve is properly supported in the pipeline; the trunnion design does not require the pipe flanges to carry the ball assembly weight.
Orientation: The gear operator or actuator should be mounted with the stem vertical. Horizontal stem orientation is acceptable only with adequate support of the operator.
Cavity Vent/Drain: If the valve is equipped with cavity vent/drain ports, ensure they are correctly connected or plugged as per the project’s safety requirements. The cavity must be depressurized before disassembly.
Seat Type: Understand the seat design (SPE or DPE). DPE seats provide a seal in both directions at the expense of cavity self-relief; an external relief valve may be required for thermal overpressure.
Startup: Cycle the valve fully open and closed before pressurizing. Flush the line to remove debris that could damage the seats.
Maintenance: Trunnion valves are heavy and require proper lifting and support during maintenance. Sealant injection ports, if fitted, should be greased periodically.
This technical data sheet is intended for product selection and general reference. Actual dimensions, weights, Cv values, and material certifications are provided in order-specific approved drawings. The manufacturer reserves the right to modify designs and materials without prior notice.