Valve assembly

Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing

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Details

137383, 251 95, 251214, 251327, 251328, 277 72FM, 277188A, F16K 1104, F16J 1540, F16J 1548

Patent

active

052053172

ABSTRACT:
A gate valve is provided having a housing with an interior channel, and a gate which slideably engages the channel. The valve includes a peripheral seal, positioned in the channel to prevent the flow of fluid around the edges of the gate. The valve also includes a transverse seal positioned in the housing to prevent the flow of fluid along the planar surfaces of the gate. The transverse seal includes a generally U-shaped casing disposed about a packing material. The packing material maintains pressure against the casing, thus forcing the casing against the gate. The surface of the casing which is adjacent the gate includes a plurality of raised ribs. The casing includes a bottom member, and two oppositely disposed legs. Each leg has a foot at its distal end, extending away from the packing. Scraping blades are positioned adjacent to each leg member and its corresponding foot. The scraping blades clean debris from the gate, and prevent "rolling" of the seal into the channel. The valve also includes a retention pin which can be inserted through a hole in the gate, and through a corresponding pin receptacle in the assembly. The retention pin can be padlocked into position, and prevents translation between the gate and the housing. The pin can be colored, so its position can visually be determined from a distance.

REFERENCES:
patent: 2731282 (1956-01-01), McManus et al.
patent: 2774371 (1956-12-01), Grannenfelt
patent: 2829862 (1958-04-01), Wey
patent: 3090218 (1963-05-01), Birkness
patent: 3319661 (1967-05-01), Shindler
patent: 3448762 (1969-06-01), Schmitt
patent: 3710816 (1973-01-01), Prince
patent: 3933092 (1976-11-01), Still
patent: 4206905 (1980-06-01), Dobler
patent: 4886241 (1989-12-01), Davis et al.
patent: 4962785 (1990-10-01), Clifford

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