Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent
1981-07-06
1983-04-05
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Assembling, disassembling, or removing cartridge type valve
137375, 1374542, 251204, 251328, F16K 316, F16K 2500
Patent
active
043788173
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
Technical Field
This invention relates to slide valves for high temperatures, high pressure use in the various process industries where the valves are subject to considerable wear because of the fluid flow and operating conditions.
Slide valves are used extensively in the process industries, and are known to be subject to corrosion, erosion, and improper adjustment. In many uses, the extremely high fluid temperature will cause some of the valve components to expand, causing inadequate control of the process fluid. Most of the time, because of the design of the valves, the valves are not capable of compensatory adjustment without being removed from the process line, or at least temporarily by-passed.
Background Art
Some of the typical slide valves found in the prior art are described in the following U.S. Pat. Nos.: 3,511,261 Bick et al, 3,837,356 Selep et al, 3,964,507 Jandrasi et al, 3,976,094 Jandrasi et al, 4,042,207 Nehrlich et al.
Disclosure of Invention
Therefore, the primary object of this invention is to provide a slide valve which is inexpensive, easy to manufacture, and easy to use.
Another object of this invention is to provide a slide valve which is resistant to excessive corrosion and erosion due to the operating conditions of the fluid flow.
Still another object of this invention is to provide a slide valve which is easily repairable.
Still another object of this invention is to provide a slide valve which is easily adjustable.
Still another object of this invention is to provide a slide valve in which some of the internal valve components may be adjusted from exteriorly of the valve.
In summary, I have designed a slide valve for use in the process industries involving high temperature, high pressure fluid flow. I have designed my valve particularly to be adaptable for easy and efficient repair and adjustment.
In some process industries, such as the chemical industry or in oil refineries, many control valves are needed in the fluid lines. Too often, with many types of valves, when the valve becomes defective, the fluid line must be shut off upstream of the valve and the valve removed entirely from the line so that it can be repaired. Removal from a process line, disassembly, repair, and subsequent re-assembly and re-installation of the usual large and heavy control valve is a difficult, inefficient, and time-consuming operation.
My invention eliminates many of the problems which I have described, because I have designed my slide valve to be capable of being repaired without having to be removed from the process line, and also to be capable of being adjusted as to certain interior components even without interruption of the process flow.
High temperature process conditions will almost invariably cause expansion and mis-alignment of some of the operating components of a slide valve, consequently causing a lack of adequate control over the process conditions. Particularly does mis-alignment occur in relation to components which are exposed to the process conditions interiorly of the valve and at the same time are exposed to conditions exteriorly of the valve, such as when an adjustment component includes one portion inside the valve and an integral portion outside the valve. For example, a typical slide valve might include a screw member cooperating with a slide component inside the valve to control the positioning of the slide component against a valve seat while the screw member passes through the wall of the valve to be adjustable from the exterior. Thus, in high temperature process conditions, an adjustable component like this is subject to the extremes of temperature from the interior and from the exterior and will not likely retain its alignment. In addition, slide valves designed for high temperature use usually include a multitude of interior components which, because of the shape and material of each component may result in unequal expansion of each component in relation to others causing inadequate adjustment of the slide valve. However, I have designed my valve s
REFERENCES:
patent: 1808715 (1931-06-01), Reynolds
patent: 2344747 (1944-03-01), Sperry et al.
patent: 2793002 (1957-05-01), Kellar
patent: 3511261 (1970-05-01), Bick et al.
patent: 3557822 (1971-01-01), Chronister
patent: 3837356 (1974-09-01), Selep et al.
patent: 3964507 (1976-06-01), Jandrasi et al.
patent: 3976094 (1976-08-01), Jandrasi et al.
patent: 4042207 (1977-08-01), Nehrlich et al.
patent: 4316483 (1982-02-01), Jandrasi
Massa Robert E.
Superior Valve Corporation
Walton George L.
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