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As defined by API 6D, it's a single valve with two seating surfaces that, when closed, seal against pressure from both ends and have a means of venting/bleeding the cavity between the seating surfaces. It comes in modular or split - body type and integral types. The modular type has two balls in one valve for enhanced safety, while the integral type is used in the instrumentation industry with various designs. It features fire - safe design, anti - blow - out stem, and is available in size range from NPS 2 to NPS 28 and class range from 150 lb to 2500 lb.
This valve is widely used in industries such as natural gas, petrochemical, and transmission and storage. It's crucial in applications where no leakage is allowed, like in the main - line and multi - purpose valves in liquid pipelines and transmission lines of refined materials. It's also used in the calibration of meters, as each valve closed to the meter device must be tightly sealed to ensure accurate calibration.
Q: How does the Double Block and Bleed Ball Valve differ from a conventional valve?
A: Unlike conventional valves, it can effectively prevent leakage during system operation, and it allows for quick closure and easy discharge.
Q: What are the benefits of the modular or split - body type design?
A: It has two balls in one valve, which ensures greater safety. The three - piece body construction is beneficial for instrumentation and piping, and it can save weight, space, and installation time.
Q: Can this valve be used in high - pressure applications?
A: Yes, it is available in a class range from 150 lb to 2500 lb, suitable for various pressure levels, including high - pressure applications.
MAIN FEATURES
PRODUCT RANGE
Class 150 from ½'' to 10''
Class 300 from ½'' to 8''
Class 600 from 1/2" to 4"
MATERIALS
BODY: Carbon steel, Stainless steel, Low temperature carbon steel, Duplex, Special Alloys,... Other materials under request
SOFT SEATS: PTFE, RPTFE, PEEK, DEVLON, NYLON,... Other materials under request
METAL SEAT: Tungsten Carbide(TC), Stellited, Ni60...Other materials under request.
TRIM: A105+EP, 304, 316, 410, MONEL,... Other materials under request
DESIGN STANDARDS
ASME Standards
B1.20.1Pipe Threads, General Purpose(Inch)
B16.10Face-to-Face and End-to-End Dimensions of Valves
B16.25Buttwelding Ends
B16.11Forged Fittings, Socket-Welding and Threaded
B16.5Flanged Fittings and Pipe Flanges
B16.47Large Diameter Steel Flanges
API Standards
6DSpecifications for Pipeline valves
598Valve Inspection and Testing
607Fire test for soft-seated quarter-turn valves
6FASpecification for Fire Test for Valves
MSS Standards
SP-55Quality Standard for Steel Castings for Valves,Flanges,and Fittings and Other Piping Components-Visual Method for Evaluation of Surface Irregularities
SP-54Quality Standard for Steel Castings for Valves,Flanges,and Fittings and Other Piping Components-Radiographic Examination Method
SP-53Quality Standard for Steel Castings for Valves,Flanges,and Fittings and Other Piping Components-Magnetic Particle Examination Method
| PRODUCT | SIZE | PRESSURE | POWER | BRAND NAME |
| DBB BALL VALVE | 1/2"-48" | 150lb-2500lb | WORM, PNEUMAITC, HYDRAULIC | YFV, OEM |
Production process
Certificates & Test reports
Packing&Shipping
As defined by API 6D, it's a single valve with two seating surfaces that, when closed, seal against pressure from both ends and have a means of venting/bleeding the cavity between the seating surfaces. It comes in modular or split - body type and integral types. The modular type has two balls in one valve for enhanced safety, while the integral type is used in the instrumentation industry with various designs. It features fire - safe design, anti - blow - out stem, and is available in size range from NPS 2 to NPS 28 and class range from 150 lb to 2500 lb.
This valve is widely used in industries such as natural gas, petrochemical, and transmission and storage. It's crucial in applications where no leakage is allowed, like in the main - line and multi - purpose valves in liquid pipelines and transmission lines of refined materials. It's also used in the calibration of meters, as each valve closed to the meter device must be tightly sealed to ensure accurate calibration.
Q: How does the Double Block and Bleed Ball Valve differ from a conventional valve?
A: Unlike conventional valves, it can effectively prevent leakage during system operation, and it allows for quick closure and easy discharge.
Q: What are the benefits of the modular or split - body type design?
A: It has two balls in one valve, which ensures greater safety. The three - piece body construction is beneficial for instrumentation and piping, and it can save weight, space, and installation time.
Q: Can this valve be used in high - pressure applications?
A: Yes, it is available in a class range from 150 lb to 2500 lb, suitable for various pressure levels, including high - pressure applications.
MAIN FEATURES
PRODUCT RANGE
Class 150 from ½'' to 10''
Class 300 from ½'' to 8''
Class 600 from 1/2" to 4"
MATERIALS
BODY: Carbon steel, Stainless steel, Low temperature carbon steel, Duplex, Special Alloys,... Other materials under request
SOFT SEATS: PTFE, RPTFE, PEEK, DEVLON, NYLON,... Other materials under request
METAL SEAT: Tungsten Carbide(TC), Stellited, Ni60...Other materials under request.
TRIM: A105+EP, 304, 316, 410, MONEL,... Other materials under request
DESIGN STANDARDS
ASME Standards
B1.20.1Pipe Threads, General Purpose(Inch)
B16.10Face-to-Face and End-to-End Dimensions of Valves
B16.25Buttwelding Ends
B16.11Forged Fittings, Socket-Welding and Threaded
B16.5Flanged Fittings and Pipe Flanges
B16.47Large Diameter Steel Flanges
API Standards
6DSpecifications for Pipeline valves
598Valve Inspection and Testing
607Fire test for soft-seated quarter-turn valves
6FASpecification for Fire Test for Valves
MSS Standards
SP-55Quality Standard for Steel Castings for Valves,Flanges,and Fittings and Other Piping Components-Visual Method for Evaluation of Surface Irregularities
SP-54Quality Standard for Steel Castings for Valves,Flanges,and Fittings and Other Piping Components-Radiographic Examination Method
SP-53Quality Standard for Steel Castings for Valves,Flanges,and Fittings and Other Piping Components-Magnetic Particle Examination Method
| PRODUCT | SIZE | PRESSURE | POWER | BRAND NAME |
| DBB BALL VALVE | 1/2"-48" | 150lb-2500lb | WORM, PNEUMAITC, HYDRAULIC | YFV, OEM |
Production process
Certificates & Test reports
Packing&Shipping