The Solution that Boiler pump control valve jammed or blocked

Boiler pump control valve jammed or blocked，how to solve？
1, cleaning method
        Pipe slag, rust, slag and so on in the throttle, guide parts, the lower valve cover hole caused by blocking or stuck to the spool surface, the guide surface to produce strain and scratches, sealing surface indentation Wait. This often occurs in the new commissioning system and overhaul after the initial operation. This is the most common fault.
In this case, you must disengage the cleaning, remove the slag, such as the sealing surface should be damaged should also be grinding; at the same time to open the plug to flush out from the balance hole into the lower valve cover slag, Rinse. Before putting into operation, let the control valve fully open, the media flow for some time and then into the normal operation.
        2, external scouring method
        For some easy to precipitate, containing solid particles of the medium using ordinary valve adjustment, often in the throttle, the direction of the block, the bottom of the valve cover at the plug at the external flush gas and steam.
        When the valve is blocked or jammed, open the external gas or steam valve, you can not move the valve in the case of the completion of the rinse work, the valve normal operation.click to visit Boiler feedwater pump manufacturer to know more.
        3, install the pipe filter method
        The small diameter of the control valve, especially the ultra-small flow control valve, the throttling gap is small, the media can not have a little bit of slag.
        In case of this situation, it is best to install a filter on the pipe before the valve to ensure that the media passed.
        With the positioner to use the control valve, the locator is not working properly, the gas throttling port clogging is the most common fault.
        Therefore, with the locator work, you must handle the gas source, usually used by the way in the locator before the air supply line installed on the air filter pressure reducing valve.
        4, increase the throttling gap method
        Such as the solid particles in the media or the pipeline was washed out of the welding slag and rust and so on can not pass the throttle caused by plugging, jamming and other failures, you can switch to large throttle gap throttle - throttle area to open Windows, openings of the spool, sleeve, because of its throttle area rather than the distribution of the circumference, the fault can be easily excluded.
        If it is single, double seat valve can be plunger-shaped spool to "V" shaped mouth of the spool, or into a sleeve valve.
        For example, a chemical plant has a two-seat valve often stuck, it is recommended to use the sleeve valve, the problem immediately resolved.
        5, medium scouring method
        The use of the media itself, the erosion of energy, erosion and easy to easily precipitate, easy to plug things, thereby enhancing the valve anti-blocking function.
        Media scouring method common methods are:
        1) to flow closure type;
        2) the use of streamlined valve body;
        3) the throttle placed in the most powerful erosion, the use of this method should pay attention to improve the erosion of the material erosion resistance.
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        6, straight to the corner method
        Straight through the inverted S flow, the flow of complex, upper and lower cavity dead zone, for the precipitation of the media to provide a place. Angular connection, the media is like flowing through the 90 ℃ elbow, scouring performance is good, dead zone is small, easy to design streamline. Therefore, the use of through the control valve to produce a slight plug can be changed into angular valve use.