Double Block and Bleed Ball Valve Manufacturer in Canada

Double block and bleed ball valves are made to offer two distinct sealing surfaces and a bleed port, ensuring secure verification of cavity pressure and leak testing for crucial pipeline isolation. ValvesOnly Canada is a topmost Double Block and Bleed Ball Valve Manufacturer in Canada, serving industries throughout Toronto, Calgary, Edmonton, Vancouver, Montreal, and Canada.

Double Block and Bleed Ball Valve Engineering Specifications:

• Nominal Size: 2″ to 48″
• Pressure Class: Class 150 to Class 2500
• Temperature Range: -29°C to 450°C
• Design Standards: API 6D, ASME B16.34, ISO 14313
• Face to Face: ASME B16.10
• Inspection and Testing: API 6D, API 598, Hydrostatic Shell Test, Seat Leakage Test

Double Block and Bleed Ball Valve Construction Details:

Body and Pressure Retaining Parts:

• ASTM A216 WCB
• ASTM A352 LCB / LCC
• ASTM A351 CF8 / CF8M
• ASTM A182 F304 / F316 / F316L
• ASTM A890 F51
• ASTM A890 F53 / F55 / 2507
• ASTM B564 Hastelloy C276 / B3
• ASTM B564 Inconel 625 / 718

Internal Components:

• Ball: Stainless Steel / Duplex Stainless Steel / Super Duplex / Hastelloy / Inconel
• Stem: ASTM A182 F304 / F316
• Seat Ring: Stainless Steel / Duplex Stainless Steel

Double Block and Bleed Ball Valve Sealing Arrangement:

• Seat: Soft Seated / Metal Seated
• Gasket: Graphite / Spiral Wound
• Packing: Graphite

Double Block and Bleed Ball Valve Working Principle:

The Double Block and Bleed Ball Valve comprises two sealing faces together with a bleed point all incorporated into a single valve body, thus offering proven isolation in important pipeline systems. Both seats seal independently under pressure while the bleed feature offers the capability of releasing or monitoring pressure in the cavity prior to any maintenance work.

This design is compact, minimizing space usage and also eliminating possible leakage points, hence no requirement for several isolation valves.

Double Block and Bleed Ball Valve Material Options:

Standard Materials:

Component	Material	Grade	Typical Application
Body	Carbon Steel	ASTM A216 WCB / ASTM A352 LCB / LCC	Pipeline and general industrial service
Body	Stainless Steel	ASTM A351 CF8 / CF8M, ASTM A182 F304 / F316 / F316L	Corrosive process media
Body	Duplex Stainless Steel	ASTM A890 F51	Offshore and seawater applications
Body	Super Duplex Stainless Steel	ASTM A890 F53 / F55 / 2507	High chloride environments
Body	Hastelloy	ASTM B564 C276 / B3	Severe chemical service
Body	Inconel	ASTM B564 625 / 718	High-temperature and high-pressure systems

Optional Material Configurations:

• Monel 400 for marine and hydrofluoric acid applications
• Alloy 20 (CN7M) for acidic chemical applications
• Titanium Grade 2 / Grade 5 for seawater service
• Hard-faced trim available for abrasive media
• Customized material combinations available according to project specifications

Double Block and Bleed Ball Valve Design Features:

Valve Type:

Double Block and Bleed Ball Valve

Actuation Options: 

• Manual
• Gear Operated
• Pneumatic Actuated
• Electric Actuated

Body Design Configuration:

• Bolted Body
• Fully Welded Body

Port Configuration:

• Full Bore
• Reduced Bore

Seat Construction:

• DIB-1
• DIB-2

Performance Benefits:

• Two independent sealing systems
• Bleed-off system for cavity pressure confirmation
• Fewer pipeline connections
• Compact valve configuration
• Bubble-tight sealing capability
• Secondary sealing mechanism in case of leakage at one seating position
• Minimal maintenance needs
• Can be used in high-pressure pipeline applications

Inspection Procedures:

• Hydrostatic Shell Testing
• Seat Leakage Testing
• Operational Testing
• Visual and Dimensional Inspection
• Pressure Verification before dispatch

Double Block and Bleed Ball Valve End Connection Options:

Our Double Block and Bleed Ball Valve is available with multiple connection configurations to suit industrial piping systems and project requirements.

• Flanged as per ASME B16.5
• Butt Weld as per ASME B16.25
• Socket Weld for small sizes
• Tailored end connection as per project requirements
• Flange drilling as per customer requirement

Double Block and Bleed Ball Valve Application Overview: 

• Oil and Gas Industry: Pipeline transmission, gathering, and production facilities
• Petrochemical Industry: Refinery equipment, isolation and handling of hydrocarbons
• Chemical Processing Industry: Isolation of highly aggressive process media
• Power Generation: High pressure utility and fuel handling systems
• Offshore Oil Industry: Offshore production platform and subsea process systems
• Marine Industry: Marine process pipelines and offshore loading facilities
• Pipeline Network: Metering facilities, custody transfer skids, and pipeline transmission
• Terminal Facilities: Loading/unloading and storage pipeline isolation
• Process Plants: Lockout/Tagout isolation and maintenance applications