Direct single seat valve repair Oulei Si valve repair factory in Jiangyin regulating valve repair, a large number of varieties, and therefore understand through single seat control valve repair the structure of the final repair quality plays a role can not be ignored , Talking to you now there Jiangyin Oulei Si through single seat the regulating valve repair structure:
Through single seat control valve maintenance explain: Straight single seat valve by the valve body, valve seat, valve core, the guide sleeve valve cover, stem and packing parts. Spool and stem connected together. The connecting method can be used the interference fit pinned or threaded connection pin fixed, the stem and the spool can also be integrally out of the car. A guide sleeve in the valve cover and valve body, play a guiding role for the spool up and down movement. Guide sleeve hole, connecting the valve body cavity and the valve outlet end. The guide sleeve cavities media easily flows through the orifice into the valve outlet end, and does not affect the movement of the spool.
Through single seat control valve maintenance explain: through single seat control valve, the valve body is only one spool and a seat. The small amount of leakage, easy-to ensure sealing. Adjust the type and cut type structure. The difference is that the shape of the spool. The regulator spool type shape of the plunger-shaped; cutting spool type shape to a flat plate-shaped or conical, it is another characteristic of the medium on the urging force of the spool, i.e. the imbalance force, especially in the high differential pressure more serious cases of large-caliber, and so applies only to low-dropout occasions. Otherwise, should select the appropriate thrust of implementing agencies, or together with the valve positioner.
Explain direct single seat valve repair: single-seat pass-through the regulating valve spool dress and two types of anti-loaded. Between the spool and the valve seat when the spool is moving down the flow area is reduced, called the dress; otherwise known as the Anti-loaded. The regulating valve nominal size DN and seat diameter dN marks valve size. For the the single oriented spool nominal size DN <2.5mm, can only dress not anti installed. Therefore the gas open counterproductive implementing agencies. The gas open regulating valve flow area also increases with increasing signal pressure; gas off Formula opposite the flow area decreases with increasing signal pressure. This is the direct single seat valve repair some simple knowledge.
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