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

Site Installations Petroleum Tank Storage

Manifold

Matrix Manifold Installation

Jet Fuel Tank

Full Assembly & Testing Capability

Able to mount both Electrical & Pneumatic actuators

All DBB Gate Valves are 100% Tested

Exploded View

• 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: - Sales@vinox-engrg.com