DOUBLE BLOCK AND BLEED BALL VALVE MANUFACTURERS IN INDIA

Speciality Valve being one of the most reliable Double Block & Bleed Valve Manufacturers in India, provides hardy and precisely designed valves for challenging applications. In industries where system integrity and zero leakage are not negotiable, specialized valves play a pivotal role. Double Block & Bleed (DBB) valves are engineered to establish safe maintenance and secure isolation.

What is Double Block & Bleed Valve?

A Double Block & Bleed Valve is one assembly valve type that integrates two isolation valves and one bleed valve into a compact device. It provides full isolation from both ends of the line and facilitates safe bleeding of trapped fluid between the blocks to avoid contamination or accidental discharge.

Why Required?

These valves are particularly needed in applications where operation, system reliability, and operational integrity as well as safety are essential. They assist in the isolation of critical process equipment for maintenance without stopping the entire system. DBB valves also assist in saving weight, space, and leak paths as compared to standard multi-valve arrangements.

Major Components of Double Block & Bleed Valve

· Two isolation valves (plug, ball, or gate)

· One bleed valve (needle type)

· Body (forged or cast material)

· Stem and seals

· Actuator (electric, pneumatic, or manual)

· End connections (flanged, threaded, or welded)

Working Principle

With the two isolation valves closed and the bleed valve open, the space between blocks can be drained or vented safely. This verifies that the primary and secondary isolations are in place. The valve is a safe and efficient means of testing pressure integrity or relieving trapped pressure prior to maintenance.

Advantages of Double Block & Bleed Valve

· Space and weight saving, compact design

· Fewer leak points possible

· Installation and maintenance cost saving

· Enhanced safety for critical isolation

· Increased installation speed with reduced components

Functions of Double Block & Bleed Valve

· Offers double isolation securely

· Supports safe bleeding of trapped fluids

· Facilitates in-line calibration of instruments

· Avoids cross-contamination in critical systems

· Applied for pressure monitoring and venting

Valve Types

1) Floating DBB ball valve

2) Trunnion-mounted DBB ball valve

3) Manual or actuated DBB valves

Industries

1. Oil and Gas (upstream, midstream, downstream)

2. Petrochemical and Refineries

3. Power Generation

4. Marine and Offshore

5. Chemical Processing

6. Pipeline Transmission Systems

Our DBB valves are made from premium-grade stainless steel, carbon steel, or special alloys to provide longevity, corrosion protection, and international standards compliance.

Why Choose Us?

· Approved and trusted manufacturing process

· Custom configurations available

· Precision machining and leak-free performance

· Timely delivery and professional assistance

· Strict adherence to safety and quality

If you want improved safety, less downtime, and system design maximized, your best bet is Speciality Valve. Being one of the top Double Block & Bleed Valve Manufacturers in India, we combine technical knowledge, industry experience, and assurance of quality to provide solutions that you can rely on.

Description Materials: Cast iron, Cast steel (WCB, WCC, WC6, WC9, LCB, LCC), Ductile iron, SS304, SS316

Class: PN10 to PN 450; 150 to 2500

Ends: Buttweld, Flanged, Socket weld, Threaded

Size: 1/2’’to 24’’

Operations: Electric Actuated, Pneumatic Actuated, Gear Operated, Handwheel Operated