Sliding-gate valve for use with abrasive materials

Patent · Tue Jan 01 00:00:00 EST 1985

OSTI ID:865489

Carter, Charles R ^[1]; Griffith, Richard A ^[2]; Loomis, Richard B ^[3]; Notestein, John E ^[2]

---

1. Fairmont, WV
2. Morgantown, WV
3. Bruceton Mills, WV

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.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4524796
• OSTI ID: 865489
• Country of Publication: United States
• Language: English

Related Subjects

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/