GALLERY
PRODUCT DESCRIPTION
Trunnion Mounted DBB Compact Manifold Ball Valve
EDVC Valves Compact Design valves utilize a face to face dimension of a single ball valve in accordance with API 6D and yet this design is double isolation with two independent balls in one valve body, guaranteeing positive shut off with maximum safety with DIB-1, DIB-2 features.
EDVC Valves has developed compact design with continuous research to improve and meet customer’s requirements and expectations as a completion of its Double Block & Bleed Valves range.
The design has been developed with integral flange connections into the valve body in order to achieve a short face-to-face dimension as a single block ball valve with light weight, which means the valve can easily be installed into an existing pipeline without the need for any pipeline re-working.
Description:
VALVE DESIGN: based on API 6D and Customer requirementsTEMPERATURE RANGE: -150 to 662°F (-101 to 350°C)SIZE: NPS 2-56 (DN 50-1400)PRESSURE RATING:ASME 150 - ASME 2500FACE-TO-FAC::As per API 6D standardEND CONNECTIONS: RF, RTJ as per B16.5 &B16.47; BW, Butt Welded as per B16.25; SW, Socket Welded as per B16.11 Hub connectionBODY DESIGN: Forged bolted two-piece and three-pieceSEAT DESIGN: Soft or metal seated with Hardfacing on ball and seats; Self relieving seats; Double piston seats; Combination seats; Interchangeable seats FEATURES: Double block and bleed design (DBB);Secondary seals in pure Graphite;
Anti-Static Device;
Anti Blow out stem;
Emergency sealant injection on seats and stem available;
Low fugitive emission stem packing available;
O-ring /Lip seals and Graphite configuration;
CRA overlay on all dynamic sealing areas or on all wetted parts available;
Extended bonnet for low & high temperature available OPERATOR:
Manual: wrench or Gear with padlocking;
Actuated: Pneumatic/ Hydraulic/Electric
WHY USE A EDVC DOUBLE BLOCK AND BLEED VALVE?
EDVC Double Block and Bleed Valves replace existing tradi-
tional techniques employed by pipeline engineers to generate a double block and bleed configuration in the pipeline.
Conventionally, in order to achieve a double block and bleed system, engineers would install two standard isolation valves and a separate facility for bleeding the cavity in between. Space is usually at a premium in the refinery environment, and this approach – requiring an additional valve unit to be installed as well as a “T”-junction to allow the cavity to be bled – more than doubles the space required compared with a single valve system. This increase in size can often make the installation unfeasible, especially where multiple LEAK valves along the line are to be upgraded.
EDVC Double Block and Bleed Valves provide the reduction of potential leak points.
Tackling fugitive emissions is high on the agenda for valve end user. The problems presented by these emissions are multiple – not only does los- ing valuable media through leaks carry an economic cost, but the emis- sions are also a significant contributor to air pollution and climate change. As well as this, emissions of volatile compounds can lead to long term health risks for employees and local communities, and escaping flamma- ble substances can increase the risk of explosions. While the volume of medium escaping from any given leak may be very small, the cumulative effect across a large facility can add up to a significant proportion of the plant’s total emissions. Any seal between two separate pieces of materi- al represents a potential leak path and therefore increasing the number of different sections of pipe required for a valve installation significantly increases the likelihood of media escaping from the system.
EDVC Double Block and Bleed Valves improve safety.
Incorporating the three valves into a single housing increases the safety of the system by removing connections between separate units, resulting in fewer potential leak paths.
The unit incorporates two separate ball valves, delivering 100 per cent tight shutoff using either plastic soft seats or heavy duty metal-to-metal seats coated with a tungsten or chrome carbide-based coating. The vol- ume of the cavity between the valves is also significantly reduced, allow- ing operators to evacuate the space and establish a safe isolation more quickly – a major benefit in emergency scenarios. The reduction in vol- ume of the material removed from the valve also means less waste, reduced handling, lower costs and easier disposal.
Leave your message