A. What are the advantages of using a twin isolation trunnion mounted ball valve compared to a standard ball valve?

- **Double block and bleed functionality:** Provides superior isolation and safety for maintenance or emergencies.

- **Reduced downtime:** Allows maintenance on one section without shutting down the entire process.

- **Enhanced leak-proof performance:** Minimizes fugitive emissions.

B. What are some limitations of twin isolation trunnion mounted ball valves?

- **Higher initial cost:** Due to the complex design and double isolation features.

- **Larger footprint:** May require more space compared to a single ball valve.

- **Increased maintenance complexity:** Two valve sections require maintenance compared to a single valve.

C. What are some alternatives to twin isolation trunnion mounted ball valves?

- **Single trunnion mounted ball valve with block and bleed:** Offers some isolation capability but not double block and bleed.

Ball Valves

Twin Isolation Trunnion Mounted Ball Valve

Two balls in one body deliver double isolation with bleed, reducing weight and leak paths versus two separate valves.

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Overview

A twin isolation trunnion mounted ball valve is a robust and versatile valve designed for superior flow control and isolation in demanding industrial applications.

Key features

Double Block and Bleed: This critical feature allows for complete isolation of the section between the valves. The bleed port in the center body allows for venting or draining trapped fluids for maintenance or safety procedures.
High Pressure and Temperature Rating: The robust construction and trunnion mounted design enable handling high pressures and temperatures.
Superior Leak-Proof Performance: Double isolation and high-quality seating minimize leakage risks.
Easy Maintenance: The modular design allows for individual valve maintenance without disrupting the entire piping system.
Versatility: Available in various sizes and materials to suit diverse industrial applications.
Bidirectional Flow: Each valve section can allow flow in either direction, offering flexibility in piping layouts.

Technical specifications

Size Range: 2 – 24 NPS, DN50 - DN600
Body Materials: ASTM A216, A105, A350, A182, A351, A352, A890, A995.
Temperature Range: -29°C to 450°C
Ball Materials: ASTM A216, A105, A350, A182, A351, A352, A890, A995.
Maximum Allowable Operating Pressure: ANSI 150#, ANSI 300#, ANSI 600# , ANSI 900#, ANSI 1500#, ANSI 2500#
Seat Materials: PTFE, NYLON, PEEK, NBR, KELF, ENP (Electroless nickel plating), HC (Hard chrome).
Shutoff Rating: Bidirectional Bubble-tight
Body Style: Flanged End, Butt Weld, FE V/s BW
Design Standard: API 6D, ASME 16.34
Flange Drilling: ASME B16.5
Testing Standard: API 598, ISO 5208, EN 12266-1
Face To Face: ASME B16.10
Applications: Oil & Gas, Wastewater, Seawater, Petrochemicals

Applications

Oil & Gas
Wastewater
Seawater
Petrochemicals

Benefits

Enhanced Safety: Double block and bleed functionality provides a higher level of safety during maintenance or in case of leaks.
Reduced Downtime: Isolating one valve section allows for maintenance on the other section without shutting down the entire process line.
Minimized Fugitive Emissions: Leak-proof design helps reduce environmental impact.
Long Service Life: Durable construction and ease of maintenance contribute to a long lifespan.
Reliable Flow Control: Double isolation and tight seating ensure precise flow control.

Frequently asked questions

Application engineering

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