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Title: Sliding-gate valve for use with abrasive materials

Abstract

The invention is a flow and pressure-sealing valve for use with abrasive solids. The valve embodies special features which provide for long, reliable operating lifetimes in solids-handling service. The valve includes upper and lower transversely slidable gates, contained in separate chambers. The upper gate provides a solids-flow control function, whereas the lower gate provides a pressure-sealing function. The lower gate is supported by means for (a) lifting that gate into sealing engagement with its seat when the gate is in its open and closed positions and (b) lowering the gate out of contact with its seat to permit abrasion-free transit of the gate between its open and closed positions. When closed, the upper gate isolates the lower gate from the solids. Because of this shielding action, the sealing surface of the lower gate is not exposed to solids during transit or when it is being lifted or lowered. The chamber containing the lower gate normally is pressurized slightly, and a sweep gas is directed inwardly across the lower-gate sealing surface during the vertical translation of the gate.

Inventors:
 [1];  [2];  [1];  [3];  [1]
  1. (Morgantown, WV)
  2. (Fairmont, WV)
  3. (Bruceton Mills, WV)
Publication Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
865489
Patent Number(s):
US 4524796
Assignee:
United States of America as represented by United States (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sliding-gate; valve; abrasive; materials; flow; pressure-sealing; solids; embodies; special; features; provide; reliable; operating; lifetimes; solids-handling; service; upper; transversely; slidable; gates; contained; separate; chambers; gate; provides; solids-flow; control; function; supported; means; lifting; sealing; engagement; seat; closed; positions; lowering; contact; permit; abrasion-free; transit; isolates; shielding; action; surface; exposed; lifted; lowered; chamber; containing; normally; pressurized; slightly; sweep; gas; directed; inwardly; lower-gate; vertical; translation; separate chambers; sweep gas; abrasive material; operating life; flow control; chamber containing; closed position; sealing surface; closed positions; sealing engagement; gate valve; operating lifetime; operating lifetimes; control function; vertical translation; sliding-gate valve; sealing engage; /137/251/

Citation Formats

Ayers, Jr., William J., Carter, Charles R., Griffith, Richard A., Loomis, Richard B., and Notestein, John E. Sliding-gate valve for use with abrasive materials. United States: N. p., 1985. Web.
Ayers, Jr., William J., Carter, Charles R., Griffith, Richard A., Loomis, Richard B., & Notestein, John E. Sliding-gate valve for use with abrasive materials. United States.
Ayers, Jr., William J., Carter, Charles R., Griffith, Richard A., Loomis, Richard B., and Notestein, John E. Tue . "Sliding-gate valve for use with abrasive materials". United States. https://www.osti.gov/servlets/purl/865489.
@article{osti_865489,
title = {Sliding-gate valve for use with abrasive materials},
author = {Ayers, Jr., William J. and Carter, Charles R. and Griffith, Richard A. and Loomis, Richard B. and Notestein, John E.},
abstractNote = {The invention is a flow and pressure-sealing valve for use with abrasive solids. The valve embodies special features which provide for long, reliable operating lifetimes in solids-handling service. The valve includes upper and lower transversely slidable gates, contained in separate chambers. The upper gate provides a solids-flow control function, whereas the lower gate provides a pressure-sealing function. The lower gate is supported by means for (a) lifting that gate into sealing engagement with its seat when the gate is in its open and closed positions and (b) lowering the gate out of contact with its seat to permit abrasion-free transit of the gate between its open and closed positions. When closed, the upper gate isolates the lower gate from the solids. Because of this shielding action, the sealing surface of the lower gate is not exposed to solids during transit or when it is being lifted or lowered. The chamber containing the lower gate normally is pressurized slightly, and a sweep gas is directed inwardly across the lower-gate sealing surface during the vertical translation of the gate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}

Patent:

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