A cryogenic regulating valve with piston pressure self-sealing and positioning
A piston pressure, self-sealing technology, used in shaft seals, valve heating/cooling devices, lift valves, etc., can solve problems such as frequent replacement, short service life of cryogenic control valves, and instability of vertical pressure rods , to achieve the effect of eliminating icing and bonding, reliable valve sealing, and improved safety and reliability
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[0019] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0020] see figure 1 , a cryogenic control valve with piston pressure self-sealing and positioning, a sleeve 3 is arranged inside the valve body 1, and a metal wound gasket 2 is arranged therebetween. A valve plug 4 is arranged inside the sleeve, and the upper part of the valve plug is connected with the lower part of the valve stem 10 . The bottom of the extended bonnet 9 is provided with a piston pressure self-sealing and positioning assembly 5, which is connected with the internal thread at the lower end of the extended bonnet by its upper thread. The extended valve cover 9 arranged on the upper part of the valve body is fixed by bolts 7 and nuts 8 fasteners, and the sealing gasket 6 and the sleeve are compressed therebetween. An isolation drip pan 16 and an upper valve cover 17 are provided above the extended valve cover, which are respectively conn...
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