characteristics of the DBB
The Dual Expanding Plug valves produce a watertight closure both upstream and downstream, being used in different sectors:
- Storage tanks
- Loading and unloading stations
- Multi-product distributors
- Measuring stations
- Aviation fuel services
- Transfer of custody units
- Marine platforms
The design of these valves allows closure on both sides and venting in the valve chamber (double block & bleed). Since its sealing mechanism is not based on friction and wear on the closing elements we prevent product loss and contamination, in addition to meaning a long life.
COMPETITIVE ADVANTAGES
ARFLU Dual Expanding Plug valves represent the “single valve solution”. They are easy to operate, require very little maintenance and offer verifiable double block & bleed service with an extraordinary long lifetime.
DESIGN FEATURES
DOUBLE BLOCKING AND BLEED
Easy handling, lower maintenance cost and space saving
BACK SEAT
The gasket is easily replaceable or adjustable, even if the line is under pressure.
DESIGN
Our design is optimized using the most modern computer technology, 3D design, Finite Element Calculation, …
MANUFACTURING CAPACITY NO FRICTION
Low and friction-free operating torques at opening and closing.
MAINTENANCE AND SERVICE
Easy access to the slips to change them quickly, if necessary. Low cost maintenance.
PACKING
Option of special requirements on demand (such as TA Luft, fugitive emissions, etc.).
LOWER TRUNNION
As there is no cavity in the body there is no accumulation of particles that could interfere with the functioning of the valve.
DOUBLE GUIDED PLUG
This ensures the alignment and tightness of the two slips
TECHNICAL INFORMATION
ARFLU MANUFACTURING RANGE
SIZE
construction
ends
asme class
international standards
INTERNATIONAL DESIGN STANDARDS
DESIGN AND MANUFACTURING:
API 599: Metal Plug Valves – Flanged and Welding Ends
API 6D: Pipeline Valves. Pressure Test Specification.
ASME B 16.34: Valves-Flanged, Threaded, and Welding End.
ASME B 31.3: Process Piping
ASME B 31.4: Pipeline transportation systems for Hydrocarbons and other liquids
API RP 6FA: Specification for Fire Test for Valves
INSPECTION AND TEST:
API 6D: Pipeline Valves. Pressure Test Specification.
API 598: Valve Inspection and Testing.
ISO 15848: Industrial Valves – Measurement, test and qualification procedures for fugitive emissions.
FLANGE DIMENSION:
ASME B 16.5: Pipe Flanges and Flanged Fittings.
ASME B16.47: large diameter steel flanges: nps 26 through nps 60
MSS SP 44: Steel pipeline flanges
WELDED END:
ASME B16.25: Buttwelding ends
FACE TO FACE AND END TO END:
ASME B 16.10: Face-to-Face and End-to-End Dimensions of Valves.
API 6D: Pipeline Valves. Pressure Test Specification
API 599: Metal Plug Valves – Flanged and Welding Ends
STANDARD ARFLU
BY-PASS & DRAIN:
MSS SP 45: By – Pass & Drain Connections
* Other standard/materials under request
