초록 ▼

Valve actuators are protected by fireproof enclosures capable of withstanding temperatures up to 2300°F. The fireproof enclosures are made up of two or more units, one of which is a center unit rigidly mounted upon the valve actuator itself. The other units are attached to the center unit by means o

Valve actuators are protected by fireproof enclosures capable of withstanding temperatures up to 2300°F. The fireproof enclosures are made up of two or more units, one of which is a center unit rigidly mounted upon the valve actuator itself. The other units are attached to the center unit by means of stepped flanges forming airtight seals therewith. Each unit has a substantially box-shaped frame with expanded metal sides, which frame, exclusive of stepped flanges, is substantially completely encased in a homogeneous body of refractory material, preferably formed by vacuum molding form a slurry of refractory material into a mold surrounding the exterior of the frame and curing the refractory material deposited thereby. The preferred refractory material is a mixture of alumina ceramic fibers and a colloidal silica binder.

대표청구항 ▼

A fireproof enclosure for protecting a valve actuator, said fireproof enclosure comprising a plurality of units, one of said units being a center unit adapted for mounting upon a valve actuator and each other unit being an extension unit adapted for mounting upon the center unit to form a tight seal

A fireproof enclosure for protecting a valve actuator, said fireproof enclosure comprising a plurality of units, one of said units being a center unit adapted for mounting upon a valve actuator and each other unit being an extension unit adapted for mounting upon the center unit to form a tight seal therewith, each unit having a substantially box-shaped frame with expanded metal sides, there being no expanded metal side where an extension unit is mounted upon the center unit, wherein the tight seal between the center unit and each extension unit is formed by a stepped flange capable of precluding a flame path into said fireproof enclosure and wherein the box-shaped frame of each unit, exclusive of each stepped flange, is substantially completely encased in a homogeneous body of refractory material formed by vacuum molding from a slurry of refractory material into a mold surrounding the exterior of the substantially box-shaped frame of each unit and curing the refractory material deposited thereby.