DBB Dual-Ball Floating Ball Valves

TECHNICAL DATA SHEET

Product Name: DBB Dual-Ball Floating Ball Valve (Double Block & Bleed)

1. Product Description

The DBB (Double Block and Bleed) Dual-Ball Floating Ball Valve is a compact, multi-functional valve designed to provide positive isolation and safe venting in a single body. It integrates two independent floating ball valves (for blocking) and a bleed/vent valve (typically a ball or needle valve) into one unit . This design minimizes potential leak paths, reduces space and weight compared to conventional piping assemblies, and is ideal for applications requiring double isolation such as instrument root isolation, chemical injection, sampling points, and process drain applications .

2. 주요 특징

• Compact DBB Design: Combines two block valves and one bleed valve in a single forged or cast body, eliminating multiple fittings and flanges .
• Floating Ball Design: Provides reliable bi-directional sealing. The downstream ball is forced against the seat by line pressure .
• Positive Isolation: Achieves double block capability, ensuring zero leakage on both the upstream and downstream sides simultaneously .
• Bleed Function: Central cavity features a bleed port (ball or needle valve) to relieve trapped pressure or verify seal integrity .
• Blowout-Proof Stem: Stem is designed with an internal shoulder to prevent ejection under pressure .
• Anti-Static Device: Springs and balls ensure electrical continuity between the ball, stem, and body to prevent static charge build-up .
• Fire-Safe Design (Optional): Available with fire-safe certification to API 607/6FA, featuring secondary metal-to-metal sealing .
• Low Fugitive Emissions: Optional live-loaded packing and compliance with ISO 15848 / TA-Luft .

3. Technical Specifications

4. Material of Construction

*Note: Special alloys such as Duplex (F51/F55), Super Duplex, Monel, Inconel, and Hastelloy are available upon request .*

5. Applicable Standards

• Design & Manufacture: API 6D, API 608, ASME B16.34, ISO 17292
• End-to-End / Face-to-Face: Manufacturer Standard / ASME B16.10
• Flange Dimensions: ASME B16.5
• Butt Weld Ends: ASME B16.25
• Socket Weld Ends: ASME B16.11
• Threaded Ends: ASME B1.20.1 (NPT) / ISO 228-1 (BSP)
• Fire-Safe Test: API 607 / API 6FA
• Fugitive Emission Test: ISO 15848-1 / TA-Luft VDI 2440
• Inspection & Testing: API 598 / API 6D / EN 12266-1

6. Dimensions (Reference: mm / inches)

*Dimensions are typical for Flanged Class 150/300/600 designs and may vary by manufacturer. Please consult specific drawings for exact figures.*

Class 150 / 300 / 600 (Typical Assembly)

Reference: Typical dimensions from industry sources .

7. Test Pressure (Hydrostatic)

*Note: Test pressures are based on ASME B16.34 / API 598 standards for ambient temperature water testing.*

Disclaimer: The information provided above is based on standard industry practices and manufacturer data . For exact specifications, dimensions, and custom configurations (such as special materials, pressure classes, or actuation), please refer to the official drawings or consult the factory. It is recommended to verify material compatibility for specific media and operating conditions.

보증:

SAVVY VALVES는 탁월한 제품 품질과 안심할 수 있는 애프터서비스를 제공하기 위해 최선을 다하고 있습니다. 당사 밸브는 최소 12개월의 서비스 수명을 보장하며, 이 기간 동안 필요한 모든 예비 부품과 자세한 유지보수 지침을 무상으로 제공합니다. 보증 기간 내에 인위적인 손상이 아닌 다른 원인으로 인한 손상이 발생할 경우, 무상으로 부품을 교체하고 전문 기술 지원을 제공합니다. 보증 기간이 만료된 후에는 예비 부품 비용만 지불하시면 되며, 할인된 유지보수 서비스 혜택도 누리실 수 있습니다. 당사의 목표는 신뢰할 수 있는 품질과 포괄적인 애프터서비스를 통해 고객의 운영 비용을 절감하고 생산 효율성을 향상시키는 것입니다. 기술 문의나 유지보수가 필요하시면 언제든지 전문가 팀이 신속하게 대응하여 밸브 시스템이 항상 최적의 성능을 유지하도록 보장합니다.