Bronze Trunnion Ball Valve Ready for Actuators

Description

Bronze Trunnion Ball Valve – Ready for Actuators

Model: TBV-BRZ-TRN-ISO
Product Description: Two-piece or three-piece bolted-body, trunnion-mounted ball valve with cast bronze body, blow-out proof stem, and ISO 5211 top mounting flange for direct coupling of pneumatic or electric actuators. Suitable for low to medium pressure general industrial, marine and HVAC service.

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1. Main Design Codes and Standards

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2. Main Technical Parameters

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3. Pressure-Temperature Ratings (Bronze Body – Cast Bronze ASTM B584 C83600)

Ratings derived from ASME B16.24 for cast copper alloy flanges and typical bronze valve body design. Operating limits may be further restricted by seat material.

 

Class 150 (Flanged)

 

Class 300 (Flanged)

Note: Standard PTFE seats limit continuous service temperature to 150 °C. For higher temperature, R-PTFE (up to 180 °C) or metal/graphite seats available on request. Bronze body not recommended above 177 °C continuously.

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4. Materials of Main Parts

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5. Dimensions & Weight – Typical Flanged Class 150 (Ready for Actuator)

Face-to-face per ASME B16.10 Short Pattern. ISO top mounting flange sizes and stem details provided for direct actuator coupling.

H1 is the distance from the valve body centreline to the top of the ISO mounting flange (machined surface). The actual stem extension above the flange is per ISO 5211. All valves supplied with a coupling-ready machined stem end and a position indicator stop block compatible with actuator visual indicators.

Long pattern F/F available for 3-piece design. Consult factory for Class 300 dimensions.

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6. Performance Testing

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7. Trunnion Ball & Actuator-Ready Features

• Trunnion Design: The ball is supported by upper and lower trunnion shafts housed in self-lubricating bearings. This reduces operating torque significantly compared to a floating ball design, particularly in larger sizes and higher differential pressures, allowing smaller, more economical actuators.

• Low Operating Torque: The trunnion absorbs line pressure thrust, leaving only the seat friction and bearing friction to be overcome by the actuator. Torque values are provided for each size to assist actuator sizing.

• ISO 5211 Integration: The top flange is cast integrally with the body and machined to ISO 5211. Stem ends are supplied with a square or keyed drive (double-D on request) to match standard actuator couplings. An indicator block for visual position confirmation is included.

• Anti-Blowout Stem: The stem incorporates an internal shoulder that bears against the body, preventing ejection under pressure even if the packing gland is removed.

• Self-Relieving Seats (Optional): Cavity pressure relief slots on the upstream seat allow trapped overpressure to vent to the pipeline, protecting the body cavity from excessive pressure buildup.

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8. Application Scope

• Suitable Media: Fresh water, seawater, glycol, light oils, compressed air, natural gas, diesel fuel, and various non-aromatic hydrocarbons. Bronze is inherently resistant to dezincification and corrosion in marine and brackish environments.

• Temperature Range: -29 °C to +177 °C (continuous, dependent on seat material; body rated to 177 °C).

• Key Features:

  • Ideal for automated on/off control where direct actuator mounting is required without additional adapters.

  • Bronze body offers excellent corrosion resistance and long service life in water and marine duty.

  • Trunnion design reduces torque, permitting smaller actuators and lowering system cost.

  • Two-piece bolted body allows in-line maintenance without removing the actuator (the top-mount pad stays fixed; the body halves can be separated).

  • Full-bore design (standard) provides minimal pressure drop and piggability.

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9. Optional Configurations & Accessories

• Seat Materials: R-PTFE (15% glass filled), PEEK (up to 260 °C body permitting), metal-seated for abrasive slurries.

• Threaded Ends: NPT or BSPP available up to 2″, with ISO pad.

• Fire-Safe Design: Graphite secondary seats and stem seals for API 607 certification (note: bronze body fire-safe limited to certain fire exposure times; consult factory).

• Manual Override: Declutchable manual gearbox permanently mounted on actuator top; or handwheel for valve-only option.

• Extended Stem: For insulated pipelines or buried service, with extended ISO flange.

• Live-Loaded Packing: Spring-loaded gland maintains seal during thermal cycling.

• Limit Switch & Positioner Mounting: The ISO 5211 pattern also accepts NAMUR solenoids and switchboxes via auxiliary mounting kits.

• Cleaning for Oxygen Service: Per CGA G-4.1 on request.

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Disclaimer: This technical data sheet presents typical design and performance parameters for general engineering reference. Exact dimensions, material certificates, torque values, and actuator compatibility must be confirmed using the manufacturer’s official certified documentation and approved drawings before procurement and installation.