Vlr

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Vlr

The most common application for the VLR is in venting to atmosphere. Here, the VLR is placed in a steam pipe branching from the pipe connecting the boiler and the turbine, providing a controllable conduit between the boiler and the atmosphere. During load rejection, the steam flow rate is too high for the system until the firing rate has been reduced, vent valves located at the main and reheat lines are used to handle the excess flow. The large pressure differential between the boiler and the atmosphere can cause high noise levels that require attenuation. To reduce the noise potential in the steam pipe, the pressure drop is split between the valve and a downstream diffuser or silencer. The VLR itself is equipped with a pressure reducing stage at the spindle, and often a secondary stage at the valve outlet. The VLR is also used in general pressure control applications where desuperheating is required. The VLR can be combined with a downstream desuperheater to emulate the functionality of a steam conditioning valve in situations where using a VLB proves difficult. Steam passes through the extended drilled bonnet before being throttled though a cage type plug with multiple drilled holes which provides optimum characteristics for control of steam pressure. IMI Critical Engineering uses cookies and other tracking technology to improve the performance of our site, analyse your use of it and measure our marketing efforts. For more information and to read more about our privacy policy, please visit our Privacy Policy.

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Vlr

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