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A fire and corrosion resistant enameled exteriorly sealing valve which may be mounted to a nozzle of a reaction vessel, comprising: a valve housing (1) having a valve opening therein, said housing being both internally enameled and enameled at said opening; a valve shaft (3) comprising a valve head

A fire and corrosion resistant enameled exteriorly sealing valve which may be mounted to a nozzle of a reaction vessel, comprising: a valve housing (1) having a valve opening therein, said housing being both internally enameled and enameled at said opening; a valve shaft (3) comprising a valve head (4) proximate one end thereof, said shaft and valve head being enameled on its outer surface; said valve head having a ground seat surface (4a) for mating with a housing seat surface (2a) at said opening provided at an extension (2, 21) of the valve housing (1); a stuffing box for the valve shaft (3), containing a packing (6, 7) out of material resistant to high temperatures; a spring package (17) engaging the valve shaft (3) and biasing the valve head (4) in a closed position, and by which a sufficiently high sealing force is provided between the two ground seat surfaces (2a, 4a) to maintain a seal in the presence of a fire; and said valve further comprising an actuation device (16) for opening and closing the valve.

대표청구항 ▼

A fire and corrosion resistant exteriorly enameled sealing valve suitable for mounting on a nozzle of a reaction vessel, comprising: a valve housing having a valve opening therein, said housing being both internally enameled and enameled at said opening; a valve shaft comprising a valve head proxima

A fire and corrosion resistant exteriorly enameled sealing valve suitable for mounting on a nozzle of a reaction vessel, comprising: a valve housing having a valve opening therein, said housing being both internally enameled and enameled at said opening; a valve shaft comprising a valve head proximate one end thereof, said shaft and valve head being enameled on its outer surface, said valve head having an enameled ground seat surface for mating with an enameled housing ground seat surface at said opening provided at a cylindrical extension of the valve housing; a gasket of soft material arranged between the two ground seat surfaces, which material flows or melts at a high temperature; a stuffing box for the valve shaft, containing a packing comprised of high temperature resistant material; a spring package operatively arranged to engage the valve shaft and bias the valve head in a closed position, wherein a sufficiently high sealing force is provided between the two ground seat surfaces and gasket to maintain a seal in the presence of a fire.