Abstract A filter assembly for preventing the entrapment of fluidentrained particles between metal-to-metal sealing elements of a poppet-type valve assembly at the instant of closure. The filter assembly includes a cylinder-shaped filter holder which is perforated and which surrounds the periphery of the valve head, (i.e. poppet), a filter attached to the filter holder, and a bellows for attaching the filter holder, with the filter attached thereto, to the valve head. The filter assembly is so positioned and is so dimensioned that, when the valve is in the open position, there is unrestricted fluid flow and, at the instant immediately prior to valve closure, there is clean, filtered fluid flow. As a result, at closure there are no particles which can become entrapped between the metal-to-metal sealing elements, and the valve seals cleanly.
A filter assembly, in a particle-entrained fluid flow system, for clean sealing a poppet-type valve assembly having a valve component with a valve head, comprising: a. a cylinder shaped filter holder which is perforated and which surrounds the periphery of the valve head; b. a filter attached to said filter holder; c. and, a bellows which is cylindrical and is open-ended, with one end attached to said filter holder and with the other end surrounding and attached to the periphery of the valve head; with said filter, said filter holder, and said bellows, positioned and dimensioned so that, when the valve is in the open position, there is unrestricted flow of the flow of the particle-entrained fluid, and at the instant immediately prior to valve closure there is clean, particle-free, filtered flow.
Claim 2
Dependent Claim
132 words
A filter assembly, in a particle-entrained fluid flow system, for clean sealing a poppet-type valve assembly having a valve component with a valve head, comprising: a. a cylinder shaped filter holder which is perforated and which surrounds the periphery of the valve head; b. a filter attached to said filter holder; c. and, a bellows which is cylindrical and is open-ended, with one end attached to said filter holder and with the other end surrounding and attached to the periphery of the valve head; with said filter, said filter holder, and said bellows, positioned and dimensioned so that, when the valve is in the open position, there is unrestricted flow of the flow of the particle-entrained fluid, and at the instant immediately prior to valve closure there is clean, particle-free, filtered flow.