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Technical Solutions - BVT Sweden

    BVT Sweden > Services & Solutions > Technical Solutions

Technical Solutions

Desuperheating involves several challenges, from the mechanical design to temperature control systems. Cavitation can result from too high pressure drops being taken over a single pressure stage or component. Flashing can be caused by too low water pressures or too high water temperatures. Both can result from inappropriately designed or selected water valves or spray nozzles, or a change in operating conditions. Temperature control systems depend on operating conditions, response time of control systems, rangeability and operation of control valves, and placement of temperature sensors. A temperature sensor placed too close to the water injection point can be subject to spray water droplets, throwing the measurement off. Coupled with a temperature control system controlling the spray water flow, this can result in system instability.

Installation

Pipe bends and branching pipe connections can cause rotational forces in the steam flow. They can also result in spray water hitting the pipe wall if installed too close to a desuperheater. Spray water can also hit pipe walls or welds resulting in cracks due to thermal cycling. Inappropriately designed draining systems can result in free water accumulating in the steam pipes which can cause damage to valves and pipe systems.

Magnetite and other particles in steam

Magnetite coming loose from pipe walls can be carried downstream with the pipe steam and cause clogging in trims and desuperheater internals. Valve plugs can become stuck, stopping the valve from being able to close or open. Particles can erode seat sealing surfaces, causing leakage, or control elements changing their functionality.

Noise

Acoustics in steam conditioning valves are of great importance. High pressure drop and flow rates generate high levels of noise emission which can pose challenges in maintaining acoustic requirements. Steam conditioning valves reduce stream from a higher-pressure level to a lower pressure level by use of pressure reducing stages. Noise levels depend on the pressure distribution over these stages, their drill patterns and noise abatement provided by insulation. Each valve designed by BVT is uniquely optimized based on operating conditions present.

Erosion damages

Wet steam and particles result in erosion on trim parts. If erosion affects sealing surfaces, this might result in valve leakage and overheating of downstream piping. This is most common after supercritical pressure drops, where particles and steam have very high velocity. It is also more common when the valve is operating at a small opening degree.

Positioner upgrade

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BVT remote assist

BVT remote assist utilizes Hololens to support technicians at site, allowing us to provide technical support unhindered by travel restrictions due to Covid-19. Click here for more information.
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New pressure bench

New pressure bench BVT Sweden are proud to announce our new test pressure bench in our production facility here in Säffle, Sweden. The bench is under commissioning and installation and will become Northern Europe’s biggest vertical test pressure bench for critical steam control valves. This will guarantee testing with highest ...
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Critical valve seats ready for delivery!

With BVT Sweden quality production, these critical valve spare parts are vacuum brazed for highest and most long-lasting operation.
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BVT-DLB solves customer issues

A customer in the Netherlands contacted BVT as they were experiencing maintenance and operational problems with attemperators in a "waste to energy" (WTE) boiler.
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Commissioning

BVT has developed a series of tools for use in commissioning our valves, and protecting their internal parts during steam blowing, acid cleaning and hydrostatic pressure testing of the steam / water piping.

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Factory Support Office

Industrigatan 1-3
661 32 Säffle
SWEDEN
(from 2021-08-01)

Sales Office

BVT Sweden AB
Körkarlsvägen 8
SE-653 46 Karlstad
Sweden

Factory Address

Industrigatan 1
661 32 Säffle
Sweden

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