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DBB Gate Valves High Integrity Positive Shut Off Verifiable Zero Leakage
Patent Pending : #6154462
Engineered Valves
Double Block and Bleed Plug Valves were introduced in the early 50s to meet requirements of bubble tight services in the petroleum industry and till this date there has been little enhancement in the valve design and new products “copies” introduced inthe market continue with the same inherent and sealing designs.
With corrosion being the main cause of failure on the plug, the inherit design issues is a major cause of seizing slips and damaged seals, peeling and crackling of the Electroless Nickel Plating ( ENP) seat face.
POSIWELL has for the last 24 years, acquired vast experiences in valves automation, repair, maintenance and a solution provider for valves modification. Since the Mid 90s, we have successfully modified and converted standard API 600 Gate Valves for DBB applications.
DBB Plug Valves being the most commonly used in the petroleum industry, are prone to continuous maintenance and expensive repairs. With our extensive experience and understanding the root cause failure on these valves, we embarked on our new design, a Double Block & Bleed Gate Valve.
Our Goal and objective is to reduce maintenance, repair and minimize down time.
Problems with DBB Plug......
Contamination
Reputation
Cost of delays
Legal Actions
Demurrages
is designed with patented independent spring loaded discs, patented seating design that compensate automatically when fluctuation of pressure and temperature occur, thus providing positive proof of line segregation.
When Leaks Occur, they resulted in......
Operating Principles
FIGURE 1:
Discs are
retracted in
Fully Open
Position
FIGURE 2: Discs
are still retracted
in Close Position
FIGURE 3:
Discs are
expanded in
Fully Closed
Position
Resilient Seat (Fire Safe)
Gland Packing
Locking Device
Vibration is a common issues for piping layout in most installation. Posiwell ® have incorporated a Hand-Wheel locking devise to secure the valve especially at the Fully Open position.
Position Indicator
Visual Orange Indicator visible when
valve is open, not visible when valve is
at the fully close position
V-Packing gland is used around a valve stem to prevent pressurized fluid from escaping during linear motion of stem
Posiwell ® is designed with patented independent spring loaded discs, patented seating design that compensate automatically when fluctuations of pressure and temperature occur, thus providing positive proof of line segregation.
Features & Benefits
SEAT Sealing Features
Providing a solution to meet and (or exceed Customer’sexpectation
User Friendly product and yet functional without compromisingquality & performance.
Internal Stainless Parts thus minimizing corrosion Full Bore for Maximum Flow and Piggabilty
Bottom Body Drain and Bonnet Bleed – allowed flushing ofvalve’s cavitiy
Cost effective maintenance and reduced down time Ease conversion of seat material to suit applications
Metal to Metal ( Tongue & Groove Desihn for Hi- Temp & SlurryApplications )
ASME B16.10, B16.5, Fire Safe Design – API 6FA, API – 6D
Full Assembly & Testing Capability
Able to mount both Electrical & Pneumatic actuators
All DBB Gate Valves are 100% Tested
• Oiltanking Singapore
• Oiltanking Malta
• Oiltanking Copenhagen
• Oiltanking Oman
• Oiltanking Houston
• Vitol – VTTi – Fujairah
• Vitol – ATB Malaysia
• Tankstore – Singapore
• TankMed – Tunisia
• Concord Energy – FOT Fujairah Terminal
• Vopak Algeciras – Spain
• Vopak Singapore ( Sebarok & Banyan )
• Petrol Seraya – Singapore
• Changi Airport Singapore – Jet Fuel Storage
Customers Reference......
Contact : Mr Chng Y MHP : +65 9435 0033VINOX ENGINEERING (S) PTE LTD 2 Yishun Industrial Street 1 North Point BizHub, #05-26 Singapore 768159Email: - [email protected]