INTEC Duoball Valve

The Duo ball valve, developed by KLINGER Schöneberg, has a double shut-off of the pipeline and makes it possible to increase the safety of a system significantly. The Duo ball valve is available in the same length as a standard valve and provides a compact and economical alternative to several valves.

The Duo Ball Valve (DBV) is designed for applications with extremely high safety requirements. The DBV consists of two ball valves, which are equipped on request with two independent barriers. Therefore, the safety factor could be increased 4 times compared to a standard ball valve. Due to the double isolation and bleed function each ball valve is tight on both the upstream and downstream sides.

Features of INTEC Duoball Valve

- Compared to standard ball valves, the safety can be increased by a factor of 4.

- The design is based on the integration of two ball valves in one body.

- Like all ball valves of the INTEC series, the Duoball valve is available with a floating ball or trunnion mounted ball as well as soft or metal seated execution

- All ball seat systems naturally fulfill the leakage rate A according to EN 12266 and are absolutely gas-tight.

- Due to the double insulation and venting function, every duoball valve is bi-directionally tight.

What is DBB Valve?

A double block and bleed valve are like having three valves in one.

API 6D defines a double block and bleed valve as a “single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces.”

There are a couple of different styles of double block and bleed valves. One style has two independently seating valves inside, with a bleed or drains valve. This configuration is referred to as a double isolation and bleed (DIB). The DIB valve can isolate either side of the valve (bi-directionally) to vent or bleed the cavity and isolate piping.

This trunnion style ball valve from ZECO provides a double block and bleed in a single valve. This style can isolate piping on both sides of the valve (uni-directionally) to vent/bleed the valve cavity between the seats.

Using a single double block and bleed valve system versus 3 separate valves saves installation time, weight on the piping system, and space. It also cuts down the number of leak paths to the atmosphere, reducing the risk of hazards when transferring liquids dangerous to humans or the environment.

Features and Benefits of DBB Valve

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. The biggest benefits must be seen, however, 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.

These valves have also grown to incorporate the role of chemical injection and sampling points. In-built control valves are also incorporated into these valves.