products
DBB Ball Valve
LNG Cryogenic DBB Ball Valve
Features & Benefits
1. Floating or trunnion mounted ball valves in main bore, each valve is bi-directional and designed for full differential pressure at ambient and low temperature. For main bore valve general features see the ball valve sections (floating ball or trunnion ball).
2. Full die forged structure for all pressure containing parts.
3. Integral body comprising of two ball valves through main bore with a needle bleed valve from the cavity between the two ball valves. Housing design can be split body or end entry (end entry cannot be feasible for all range).
4. Standard primary gasket design is Lip-Seal type, secondary emergency seal always provided for fire-safe purpose.
5. High quality sealing products and reduced leakage points.
6. Improved safety in operations, space and weight.
Double Electric Operator Forged DBB Ball Valve
Features & Benefits
1. Initial and installation cost savings owing to reduced structural requirements of design that saves both space and weight.
2. Increased system reliability from single valve with bleed port between two valves.
3. Improved plant and personnel safety due to anti-blowout stem, fire-safe construction and anti-static design.
DBB Double Block And Bleed Ball Valve
Features & Benefits
1. Structure : 2 pieces or 3 pieces body
2. High shut-off sealing mechanism and low torque operation
3. Block and bleed function
4. Self-cavity pressure relief
5. Fire safe design
6. Blow out proof stem construction
7. Anti-static design
9. Locking device (for lever handle operation)
Double Block and Bleed valves have been developed to substitute the process of bolting the individual valves together to provide dual insulation.
This new model provides excellent savings in weight, space, and installation time, particularly for insulation in the instrument or instrument cage.
These weight savings will amount to up to 60% and tests have shown that a time savings of 70% on installation is also possible.
In reducing the leakage pathways into the environment, thus reducing the possibility of possible dangers.
Dual isolation is an essential requirement when maintenance is performed downstream of the first isolation valve.
Cavity venting is given by either a ball or a globe vent valve such that the compressed pressure between the two isolation valves is vented safely.
What Are The Applications Of DBB Ball Valve?
DBB valves are primarily used for isolation applications in the oil and gas industry but are not sequestered to these markets alone. This section will highlight some important uses for these valves.
Some notable applications of DBB valves include:
Gas and fuel applications
Product contamination prevention
Metering applications
Transmission and storage applications
Chemical sampling/injection applications and more.
What To Look For When Selecting A DBB Ball Valve?
As with any valve, during selection, one should consider the fluid properties, pressure, temperature. Perhaps most importantly, however, is how the valve will be used. With a number of configurations offered, consider which of these will fit your process and needs best.
What Is DBB Ball Valve?
Many will wonder what is DBB valve is. Double Block and Bleed (DBB) Valve is a type of valve that serves the purpose of isolating and decreasing pressure in a system. It is made up of two shut-off valves or ‘blocks’ that are connected by a pipe or conduit. The pipes are separated by a valve in between, often referred to as a ‘bleed’ valve. When all three components are closed, it enables the system to be shut down and isolated from any increase in pressure.