China Class 300 Trunnion-mounted Forged Steel Ball Valve Supplier, Factories

● Double Block and Bleed (DBB) structure for reliable pipeline isolation

● Stable sealing performance for long-term high-pressure operation

● Fire-safe, anti-static, and anti-blowout stem design for maximum safety

● Spring-loaded seat technology ensuring consistent leak-free performance

● ISO 5211 direct mounting pad for seamless automation integration

● High-integrity stem and seat sealing for severe-service applications

● Manufactured in accordance with API 6D and ASME B16.34 standards

● Suitable for Oil & Gas, Chemical & Petrochemical, Refining, Power Generation, and LNG systems

Product Description

Key Features

Enhanced Safety & Leak Prevention

Double Block and Bleed (DBB), Anti-Blowout Stem, and Fire-Safe Design (API 607 / ISO 10497) provide maximum safety, ensuring leak-free performance in critical process lines.

Reliable Sealing Performance

The spring-loaded seat design and Double Piston Effect seat options offer superior sealing performance, providing leak-free operation even under varying pressure conditions.

Durable & Corrosion-Resistant

Crafted from high-quality forged steel and corrosion-resistant materials, this valve is built to withstand harsh conditions, offering long-term durability.

Flexible & Easy Integration

The valve supports manual, worm gear, electric, and pneumatic actuation. With ISO 5211 direct mounting options, it is designed for easy automation integration.

Versatile Bore Options

Available in Full Bore and Reduced Bore configurations to match the system's flow and pressure requirements, ensuring optimal performance.

Customizable Options

Available in a range of sizes and materials, including A694F52, A694F60, A694F65, A182F6A, A182F316, A182F347, and Inconel 625.

Product Details

The Class 300 Forged Steel Trunnion-Mounted Ball Valve delivers stable sealing and reliable performance for industrial pipeline applications. The trunnion-mounted ball ensures consistent operating torque, while the spring-loaded seat design provides automatic sealing compensation under changing pressure conditions. With Double Block and Bleed (DBB) capability and optional Single or Double Piston Effect seats, the valve offers enhanced sealing reliability and cavity pressure control. Safety is ensured with Anti-Blowout Stem, Anti-Static Device, and Fire-Safe construction compliant with API 607 / ISO 10497. Supporting manual, worm gear, electric, or pneumatic actuation with ISO 5211 direct mounting, the valve is easy to automate and maintain. Manufactured and tested to API 6D, ASME B16.34, and API 598, it meets Class 300 (PN50) pressure rating requirements for industries such as Oil & Gas, Chemical, Power, and Water Treatment.

Class 300 Ball Valve

Parts List

Parts List Diagram
1Nut9Packing17Stud25Packing33Stem
2Stud10Seat Retainer18Yoke26O-Ring34Body
3Right Body11Seat19Nut27Thrust Washer35Thrust Washer
4Gasket12Ball20Bolt28Packing Box36Stem Bearing
5O-Ring13Pneumatic actuator21Connection Plate29Gasket37O-Ring
6O-Ring14Key22Stud30Sealant Injection Valve38Gasket
7O-Ring15Coupling sleeve23Nut31Thrust Washer39Lower Cover
8Thrust Washer16Pin24Key32Stem Bearing40Bolt

Technical Specifications

Technical Specifications Chart

Dimensions: Class 300 - Full Port

SizeBoreSide EntryTop Entry
Model / Face to FaceDD1WeightModel / Face to FaceWeight
2"1.941.948.59.138.5116.56.5606011.511.6311.57.5121
504949216232216279166166272729229529219055
3"2.942.9411.1311.7511.1312.58.58.51321321414.13149.4276
8074742832982833182162166060356359356240125
Technical Detail

Frequently Asked Questions (FAQ)

1. What is a Trunnion-Mounted Ball Valve? A trunnion-mounted ball valve is a type of quarter-turn valve that uses a ball to stop or start flow. Unlike floating ball valves, the ball is anchored by a trunnion to the top and bottom, which helps reduce operating torque.
2. What standards does this valve comply with? This valve is manufactured and tested according to international standards including API 6D, ASME B16.34, and API 598, with fire-safe design compliant to API 607 / ISO 10497.
3. Can this valve be automated? Yes, the valve supports various actuation methods including manual, worm gear, electric, and pneumatic actuation, featuring an ISO 5211 direct mounting pad for easy automation integration.
4. What is the benefit of the Double Block and Bleed (DBB) design? The DBB design allows for the isolation of the upstream and downstream sections of the pipeline, with the ability to drain the cavity between the two seats, ensuring enhanced safety and maintenance capability.
5. What materials are available for this valve? We offer a variety of material options to suit different environmental needs, including A694F52, A694F60, A694F65, A182F6A, A182F316, A182F347, and Inconel 625.
6. Is this valve suitable for high-pressure industrial applications? Yes, this valve is designed to meet Class 300 (PN50) pressure rating requirements, making it ideal for high-pressure applications in Oil & Gas, Chemical, and Power industries.

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