Fluid handling – Systems – Dividing into parallel flow paths with recombining
Patent
1982-07-12
1984-09-04
Nilson, Robert G.
Fluid handling
Systems
Dividing into parallel flow paths with recombining
13762529, 1376275, F16K 1118
Patent
active
044691319
ABSTRACT:
A spool valve composite valve stem mounting a pair of valve heads longitudinally movable to a service position in which the valve heads cooperate with valve seats to direct fluid along one path, the valve stem being oppositely movable to a backwash position in which a first one of the valve heads is seated and the other is not, thereby directing fluid along a second path. The two piece, composite valve stem, in combination with other constructional features of the valve, enables the first valve head to remain seated while moving the second valve head to a seated position to establish a bypass position for directing fluid along a third path. Various means are shown for coupling together the valve stem portions and for axially moving the stem portions back and forth. Embodiments for use with water treatment equipment and water heating are disclosed.
REFERENCES:
patent: 306880 (1884-10-01), Wallace
patent: 2553458 (1951-05-01), Jordan
patent: 2921687 (1960-01-01), Jenkins
patent: 3272241 (1966-09-01), Wagner
patent: 4130133 (1978-12-01), Sullivan
patent: 4250920 (1981-02-01), Traylor
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