linear bearings

The regulator revealed how to solve?

by:AIRWOLF     2020-05-17
Our company produce all kinds of pneumatic ball valves, butterfly valves, plug valves, regulating valve, gate valve, globe valve, flat gate valve and pneumatic device or valve products. My company consistently committed to relying on scientific and technological innovation, continuous application of new technologies, new processes, new techniques, new materials to develop high quality new products, over the years for the natural gas, petroleum, chemical fertilizer, metallurgy, mining, electric power, papermaking, printing and dyeing, pharmaceutical, food, food, water supply and drainage, air treatment and heating and other industries to provide a variety of gas and hydraulic devices supporting the valve. Regulating valve leakage can be addressed by compression packing or replace the packing, for determined to put an end to the operation condition of the leakage, bellows sealed valve cover can be used, such basic can solve the problem of leakage. The valve leakage, the reason is, the first 1, the valve leakage, the valve stem length discomfort: valve leakage, gas regulator valve stem is too long and close the valve stem is too short, upward or downward from the stem is not enough, cause there is space between valve core and valve seat, not fully contact, lead to shut is lax and leakage. The solution is to shorten, Or longer) Regulating valve stem the stem length appropriate, so that it is no longer leak. 2, packing leakage: after packing into the stuffing box, the gland axial pressure on it. As a result of the packing shape, make its produce radial force, and closely contact with the valve stem, but the contact is not very uniform. Some parts of the contact tightly, some parts loose contact, even some parts not exposed to; Regulating valve in use process, there is relative motion between stem and packing, with high temperature, high pressure and the influence of the porous medium, the regulating valve stuffing box is prone to leaking. Deformation of 3, regulating valve, valve core, valve seat leakage. The main reason is because the regulator the strengthening of the casting defects in the process of production can lead to corrosion, and corrosion medium, fluid scouring can also cause a regulating valve leakage. Mainly in the form of the erosion and cavitation corrosion. When the corrosive medium by the regulator, will be on the valve core seat erosion, lead to deformation of valve core, valve seat or gap. Solution: the key to good seat valve core material selection, quality, can take charge of butt welding too alloy, strengthens the sealing surface hardness. 4, because of the impurity in the medium or new pipeline welding slag cut control valve sealing surface, the cause of leakage. Solution: a new pipeline must purge clean, add filter before or regulator. Once the leakage, can tear open the regulator, regrinding valve core and valve seat, coupled with good use.
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