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3/4"x1/2"x1/2" 1500LB F316 Stainless Steel DBB Ball Valve Double Isolation Design

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The ASME B16.34 F316 Stainless Steel 3/4"×1/2"×1/2" 1500LB DBB Ball Valve (Double Block and Bleed Ball Valve) is a high-performance double isolation and bleed ball valve engineered for severe industrial applications requiring dual isolation and superior reliability. Manufactured from F316 stainless steel, it features outstanding corrosion resistance and high mechanical strength, ideal for high-pressure working conditions in petroleum, natural gas, chemical, power and other industries. Its exclusive double isolation design achieves zero-leakage isolation during maintenance and inspection, while the built-in bleed function efficiently drains trapped media between two seats to ensure operational safety.
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3/4"x1/2"x1/2" 1500LB F316 Stainless Steel DBB Ball Valve Double Isolation Design


Structural Features

  • F316 Stainless Steel Construction: Valve body, ball and stem are all made of F316 stainless steel, delivering excellent corrosion resistance and intergranular corrosion resistance, suitable for service with chloride ion-containing corrosive media.

  • Double Isolation Design: Equipped with two independently sealed seats to realize full upstream and downstream media shutoff, meeting stringent isolation requirements.

  • Bleed Function: A bleed port is arranged at the valve body middle to discharge residual media between seats in closed position, facilitating pressure inspection and safe maintenance.

  • Forged Valve Body: Integral forging process ensures dense structure and strong pressure-bearing capacity, perfectly applicable to 1500LB (PN250) high-pressure service.

  • Floating Ball Design: The ball floats freely under medium pressure to closely fit with valve seats for tight and reliable sealing performance.

  • Fire-Safe Design: Compliant with API 607 standard, maintaining stable sealing performance and preventing medium leakage even under fire conditions.

  • Anti-Static Device: Built-in anti-static structure eliminates static accumulation and lowers fire and explosion hazards.

  • Anti-Blowout Stem Design: Optimized stem structure prevents blowout, guaranteeing safe operation under high pressure.

  • Compact Structure: 3/4"×1/2"×1/2" reducing tee type structure with small size and light weight for easy installation and system integration.


Technical Parameters

  • Size Range: 1/2"~48" (DN15~DN1200)

  • Pressure Class: 150LB~2500LB (PN20~PN420)

  • Temperature Range: -29℃ ~ 200℃ (Standard); Optional high-temperature version up to +538℃

  • Materials

    Valve Body: F316 (ASTM A182 F316) Stainless Steel

    Ball: F316 Stainless Steel with surface hardening treatment

    Valve Stem: F316 Stainless Steel

    Seal Material: PTFE, RPTFE, PEEK, Metal Seal (Optional)

  • End Connection: Flanged (RF/RTJ, per ASME B16.5)

  • Operation Mode: Manual (Lever/Gear Box), Pneumatic, Electric

  • Design Standards: ASME B16.34, API 6D, API 608

  • Test Standards: API 598, ISO 5208, API 6D

  • Face-to-Face Dimension: Conforms to ASME B16.10

  • Bleed Port Size: 1/2" NPT (Standard Configuration)


Application Fields

  • Oil & Gas Industry: Applied in oil and gas field exploitation, gathering and processing systems, realizing reliable double isolation for wellhead assemblies, metering stations and manifold systems.

  • Chemical Industry: Suitable for transmission and reaction systems of various corrosive chemical media to avoid medium leakage and ensure production safety.

  • Power Industry: Used in high-temperature and high-pressure systems such as steam systems and water supply systems for safe system isolation.

  • Pharmaceutical Industry: Installed in process pipeline systems to ensure medium isolation and cleanliness during pharmaceutical production.

  • Offshore Platform & LNG: Adaptable to marine environments and low-temperature working conditions, satisfying strict anti-corrosion and sealing demands.

  • General Industrial Service: Used for flow control and dual isolation of water, oil, gas, chemicals and other media.


Advantages & Values

  • High Safety with Dual Isolation: Independent double-seat sealing achieves genuine double block effect, greatly cutting leakage risks and protecting personnel and equipment safety.

  • Convenient Maintenance via Bleed Function: Built-in bleed port simplifies seat sealing performance detection and residual medium discharge, optimizing maintenance procedures.

  • Superior Reliability: F316 stainless steel material and floating ball structure ensure stable valve operation under high pressure and high temperature, reducing maintenance frequency and downtime.

  • Wide Application Coverage: Diverse sealing options plus broad pressure and temperature ranges enable adaptation to complex working conditions and various medium properties.

  • International Standard Compliance: Strictly designed and tested in accordance with ASME, API and other international standards to guarantee stable product quality and global applicability.

  • Cost-Effectiveness: Integrated double block and bleed functions eliminate extra valve and pipeline fittings, lowering installation cost and system complexity while upgrading overall system safety.

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