Fluid handling – Systems – Multi-way valve unit
Patent
1998-09-17
2000-01-11
Rivell, John
Fluid handling
Systems
Multi-way valve unit
13762515, F16K 11074
Patent
active
060124881
ABSTRACT:
A valve that receives sample and solvent streams, and delivers slugs of different fluid samples separated by slugs of the solvent, to a detector. The valve includes a stator (140) having a central hole (40) and a circle of sample holes (51-54) and solvent holes (91-94). The valve also includes a rotor (150) with a first groove (162) that connects one of the sample or solvent holes to the central hole to flow to the detector. The first groove is wide enough and the space between adjacent supply holes is small enough, that as the first groove moves from one hole of the circle to the next, the groove becomes partially open to the next hole before it leaves the last hole to minimize the sudden increase in pressure along the flow to the detector. The stator face has a waste recess (144) and the rotor has one or more waste grooves (171-177) that extend between the first circle and the waste recess, so when a sample from a sample hole is not flowing as a slug toward the detector, the sample instead flows to the waste recess for disposal, to minimize the sudden increase in pressure at the sample holes.
REFERENCES:
patent: 2743739 (1956-05-01), Mansen
patent: 2948299 (1960-08-01), Cassell
patent: 2964061 (1960-12-01), Rawson et al.
patent: 5316042 (1994-05-01), Lim et al.
patent: 5623965 (1997-04-01), Snider et al.
patent: 5803117 (1998-09-01), Olsen et al.
patent: 5810049 (1998-09-01), Raque et al.
Rheodyne, L.P.
Rivell John
Rosen Leon D.
Schoenfeld Meredith H.
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