Control valve, in particular two- or three-way valve for heat exchangers and the like
First Claim
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1. A control valve, in particular a two- or three-way valve for feeding hot or cold water from an inlet to a heat exchanger, said control valve comprising:
- a housing in association with said inlet and said heat exchanger;
an elongated stem (22), at least a portion of which resides in said housing, said stem being mounted for rotation and for axial displacement relative to said housing;
a non-rotatable valve part (26a) fixed axially relative to said stem for axial displacement therewith and for axially moving from one to another discrete mode of valving operation;
at least one movable valve part (26b) axially movable with said stem, and also axially movable relative to said stem and relative to said non-rotatable valve part;
means for positively displacing said stem, said non-rotatable valve part (26a) and said movable valve part (26b) between a first axial position in which the non-rotatable valve part (26a) coacts with a valve seat on the inner surface of the housing for shutting off flow of water through the valve and a second position axially spaced from the first position in which flow of water through the valve is permitted;
control means associated with said stem and with said movable valve part, for axially moving said movable valve part relative to said non-rotatable valve part upon rotation of said stem; and
port means having a continuously variable port area which is determined by the relative position between said non-rotatable valve part and said movable valve part;
said port area serving to control the flow of water between said inlet and said heat exchanger when said non-rotatable valve part is in said second position.
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Abstract
An inner valve comprises a stem having one fixed inner valve part and one or more inner valve parts which upon rotation of the stem are axially movable relative to the fixed part so as to provide a port of continuously variable area. The stem, with its inner valve parts, is also axially movable. The inner valve may be used in different types of control valves such as a two- or three-way valve for feeding hot or cold fluid to a heat exchanger.
9 Citations
9 Claims
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1. A control valve, in particular a two- or three-way valve for feeding hot or cold water from an inlet to a heat exchanger, said control valve comprising:
- a housing in association with said inlet and said heat exchanger;
an elongated stem (22), at least a portion of which resides in said housing, said stem being mounted for rotation and for axial displacement relative to said housing;
a non-rotatable valve part (26a) fixed axially relative to said stem for axial displacement therewith and for axially moving from one to another discrete mode of valving operation;
at least one movable valve part (26b) axially movable with said stem, and also axially movable relative to said stem and relative to said non-rotatable valve part;
means for positively displacing said stem, said non-rotatable valve part (26a) and said movable valve part (26b) between a first axial position in which the non-rotatable valve part (26a) coacts with a valve seat on the inner surface of the housing for shutting off flow of water through the valve and a second position axially spaced from the first position in which flow of water through the valve is permitted;
control means associated with said stem and with said movable valve part, for axially moving said movable valve part relative to said non-rotatable valve part upon rotation of said stem; and
port means having a continuously variable port area which is determined by the relative position between said non-rotatable valve part and said movable valve part;
said port area serving to control the flow of water between said inlet and said heat exchanger when said non-rotatable valve part is in said second position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a housing in association with said inlet and said heat exchanger;
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8. For use in a control valve, in particular a two- or three-way valve for feeding hot or cold water from an inlet to a heat exchanger:
- an elongated stem (22) adapted to be mounted for rotation and for axial displacement in such a manner that the rotation and axial displacement movements are independent from each other in every position of the stem;
a non-rotatable valve part (26a) fixed axially relative to said stem for axial displacement therewith and for axially moving from one to another discrete mode of valving operation;
at least one movable part (26b) axially movable with said stem, and also axially movable relative to said stem and relative to said non-rotatable valve part;
said non-rotatable valve part, in a first of said discrete modes, being adapted separately from the movable valve part to directly cooperate with a portion of the control valve to block water flow through the control valve and, in a second of said discrete modes, said non-rotatable valve part being adapted to cooperate with said movable valve part to control water flow through the control valve;
control means associated with said stem and with said movable valve part, for axially moving said movable valve part relative to said non-rotatable valve part upon rotation of said stem; and
port means having a continuously variable port area which is determined by the relative position between said non-rotatable valve part and said movable valve part;
said port area adapted to control the flow of water between the inlet and the heat exchanger when said non-rotatable valve part is in said second of said discrete modes. - View Dependent Claims (9)
- an elongated stem (22) adapted to be mounted for rotation and for axial displacement in such a manner that the rotation and axial displacement movements are independent from each other in every position of the stem;
Specification