Title: Valve for fluids containing abrasive particles

Abstract: A high pressure, high temperature, seatless cut-off valve particularly suitable for use with solid materials. The construction employs a sleeve valve reciprocable past aligned ports between concentric tubular housing members under conditions wherein the pressure conditions acting on the valve are fully neutralized at all times. Pressure neutralizing is achieved by passageway means interconnecting chambers embracing the end portions of the sleeve valve and encircling the valve in the area of its flow port and between sets of sealing rings to either axial side of this port. All surfaces contacted by the flowing fluid are preferably lined with protective laminate such as thick ceramic having a protective skin of tough abrasion resistant alloy.

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Inventors: Van der Wal, Jurjen

Application Number: 435688
Filing Date: 1974-01-23
Publication_date: 1976-02-10
Assignee:
Primary Class(es): 137/375 251/282, 251/325
Other Classes:
US Patent Ref:

267612	Nov, 1882	Steinmetz	251/325.
359948	Mar, 1897	Wilson	137/625.
1141565	Jun, 1915	Lenning	251/325.
1938943	Dec, 1933	Terry	251/325.
2029837	Feb, 1936	Schmid	251/325.
2352799	Jul, 1944	Newton	137/375.
3324879	Jun, 1967	Bucknell et al.	251/325.
3675678	Jul, 1972	Lamping	251/282.
3680832	Aug, 1972	Uliczky	251/282.

Other Refs:
Primary Examiner: Klinksik, Henry T.
Assistant Examiner:
Attorney: Sellers and Brace