The same single seat control valve problems keep appearing over and over in the field, when applying valve products. These issues can cause a lot of troubles to the operation of distinct machines. Usually, all these problems can be split into two categories, i.e. design-choice and operations-care. The design-selection group is associated with the procurement of the procedures and the valve – the problems are addressed by maintenance category after the valve is installed.
Let us see the former kind. In this category of issues it is essential the valve layout features are correctly selected. If that is not done then there is little hope that corrective activities after installment will have a way to beat these initial errors. The appropriate valve design for the application’s selection is vital. Working with the sellers to correctly implement the right design is the best way to eliminate this as a problem.
single seat control valves have many functions such as allow easy transition from one load condition to another, and convert energy by reducing the fluid pressure, handle deviations from ideal operation, handle the effect of process changes that are inevitable. There must be some pressure reduction at the valve, in order to reach these objectives. value is desired, to achieve great control. These guides are always challenged that operation margin is compromised with the lower pressure drop.
Now let’s see something about the latter kind. Once the valve is installed, it is subjected to numerous common dilemmas that lead to difficulties that occasionally can destroy the valve. If alignment is not maintained within allowances, then the seating line or contact area between the closure member and the seat ring may not be as expected, causing significant leakage. Inferior alignment additionally causes scratching and galling of the valve stem as a result of the close allowances within guides and the spacers . Furthermore, there is a major problem that of achieving complete seat loading when the valve is closed to maintain tight shutoff. Appropriate seat loads must be kept prevent erosion of the sealing surfaces and to ensure layout leakage rates.
According to the above, there are always some single seat control valve problems. It is quite essential to address in a systematic way to prevent the annoying control that is reoccurring valve issues. To cover the entire issues one must review each of the issues discussed to highlight all the root causes and take action that is right.
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