18061659285
Flanged × NPT/BSP Twin-Ball Double Block and Bleed Ball Valve with Lockable Operation
Product Parameters
Product Name |
Flanged × NPT/BSP Twin-Ball Double Block and Bleed Ball Valve with Lockable Operation |
Valve Type |
Flanged × Threaded Twin-Ball DBB Ball Valve |
Structure |
Two independent ball closures with intermediate bleed / drain connection |
Connection Type |
Flanged process connection × NPT / BSP threaded instrument connection |
Size Range |
Flanged side: 1"-12" / DN25-DN300; threaded side: 1/2"-2" NPT / BSP; larger sizes by design confirmation |
Pressure Rating |
ASME Class 150 / 300 / 600 / 900; Class 1500 / 2500 available by project design |
Bore Type |
Reduced bore / asymmetric bore design, subject to size and connection configuration |
Ball Design |
Floating ball design for compact sizes; trunnion mounted design available for larger sizes or higher pressure by project confirmation |
Body Construction |
Compact integrated body, bolted body / split body construction |
Body Material |
ASTM A105N, A350 LF2, A182 F304/F316, A182 F51/F53, A182 F11/F22 optional |
Trim Material |
SS304, SS316, Duplex SS, 17-4PH stem and project-specified trim materials available |
Seat Material |
PTFE, RPTFE, PEEK; metal seat optional by service condition |
Operation & Locking |
Dual lockable stem assemblies with linked manual operation; actuator mounting available by project design |
Temperature Range |
-29°C to +200°C for soft seated design; up to +425°C for metal seated design by material and sealing confirmation |
Design & Test Standard |
ASME B16.34; API 598 / ISO 5208; API 6D available by project requirement |
Documents |
MTC, pressure test report, inspection report, CO, test photos or videos available upon request |
Application |
Instrument Isolation, Sampling Lines, Injection Points, Metering Skids, Oil & Gas, Chemical & Petrochemical Process Piping |
Brand |
SLVCN |
Key Features
Flanged × Threaded Compact DBB Design
The flanged × NPT/BSP threaded configuration combines process connection and instrument branch connection in one compact DBB valve body, helping reduce installation space, connection points and installation complexity.
Twin-Ball Double Block and Bleed Isolation
Two independent ball closures provide upstream and downstream shut-off, while the intermediate cavity supports pressure release, draining and leakage verification before maintenance or instrument work.
Intermediate Bleed / Drain Verification
The bleed / drain connection allows the cavity between the two ball closures to be vented, drained or monitored, supporting inspection, sampling, instrument removal and process line intervention.
Lockable Operation for Field Safety
Dual independent lockable stem operation helps reduce accidental or unauthorized operation during field service, especially in instrument isolation, sampling and branch-line applications.
Reduced / Asymmetric Flow Path
The reduced / asymmetric flow path is suitable for sampling points, injection lines, instrument branches and compact skid-mounted systems where full line bore is not required.
Project-Based Configuration Options
Body material, seat material, pressure class, threaded standard, flange standard, ball design, operation method, actuator mounting and testing documents can be selected according to actual service conditions.
Product Details
SLVCN Flanged × NPT/BSP Twin-Ball Double Block and Bleed Ball Valve with Lockable Operation is designed for instrument isolation, sampling lines, injection points, metering skids and compact process piping systems where double block and bleed isolation, cavity pressure release and leakage verification are required.
The valve adopts a compact flanged × threaded configuration, combining a flanged process connection with an NPT or BSP threaded connection. This structure is suitable for branch-line installation, instrument connections and sampling points where installation space is limited and fewer connection points are preferred.
Two independent ball closures provide upstream and downstream shut-off, while the intermediate bleed / drain connection allows the cavity between the two closures to be vented, drained or monitored. This supports leakage verification before maintenance, instrument removal, sampling or process line intervention.
The reduced / asymmetric flow path is suitable for instrument branches, sampling lines and injection points where full line bore is not required. Lockable operation helps reduce accidental or unauthorized operation during field service.
Body material, seat material, pressure class, flange standard, threaded connection, locking arrangement, operation method and testing requirements can be customized according to actual service conditions. The valve is suitable for oil & gas, chemical, petrochemical, instrumentation and compact skid-mounted applications.
Decades of Expertise
Tailored Solutions
Rigorous Quality Control
Proven Reliability
How We Ensure Quality & Reliability?
Quality is built into every stage - from raw material to final testing.
CE Certificate
ISO9001 Certificate
Certificate for Credit for Quality Service
Certificate of Observing Contract and Keeping Promise
Trademark Certificate