Abstract:
A flow control valve (1) and a method for assembling a flow control valve (1) are disclosed. The flow control valve (1) comprises a first housing part (2) and a second housing part (3) attached directly to each other, in such a manner that the first housing part (2) and the second housing part (3) form a substantially closed housing. The first housing part (2) defines a first flow section (4), a second flow section (5), a connecting port (6) fluidly interconnecting the first flow section (4) and the second flow section (5), and a valve seat (7) arranged at the connecting port (6). The flow control valve (1) further comprises a frame part (9) arranged in an interior part of the housing formed by the first housing part (2) and the second housing part (3), the frame part (9) having mounted thereon a valve element (10, 13) arranged movably relative to the valve seat (7), a moving mechanism, e.g. including a spindle (12), for moving the valve element (10, 13), and an actuating mechanism, e.g. a stepper motor (14), for operating the moving mechanism. The frame part (9) is attached directly to the first housing part (2) or to the second housing part (3). The frame part (9) along with the components mounted thereon can be mounted on the first (2) or second (3) housing part during the assembly of the flow control valve (1). The final assembly step thereby only includes attaching the first (2) and second (3) housing parts to each other. This makes the assembly process easy, thereby reducing the risk of errors.
Abstract:
A servo-controlled magnetic valve has a main valve (13) and a servo valve (14). The servo valve opens when, after an empty stroke, a solenoid plunger (7) entrains a slide member (23) that carries the servo closure member (20) and, as a result, pressure is released to the low pressure side (17) from a pressure chamber (25) on the side of the servo piston (24) that is remote from the main valve seat (15). The servo piston (24) is an annular piston that surrounds an insert (19) that carries the main valve closure member (18) and the servo valve seat (20) and which, during the operating stroke, entrains the slide member (23) by means of first stops (26) and the insert (19) by means of second stops (28). In that manner, it is possible to obtain sufficient opening of the main valve (13) and a small overall height of the magnetic valve whilst retaining an initial empty stroke of the solenoid plunger (7).
Abstract:
A servo-controlled magnetic valve has a main valve (13) and a servo valve (14). The servo valve opens when, after an empty stroke, a solenoid plunger (7) entrains a slide member (23) that carries the servo closure member (20) and, as a result, pressure is released to the low pressure side (17) from a pressure chamber (25) on the side of the servo piston (24) that is remote from the main valve seat (15). The servo piston (24) is an annular piston that surrounds an insert (19) that carries the main valve closure member (18) and the servo valve seat (20) and which, during the operating stroke, entrains the slide member (23) by means of first stops (26) and the insert (19) by means of second stops (28). In that manner, it is possible to obtain sufficient opening of the main valve (13) and a small overall height of the magnetic valve whilst retaining an initial empty stroke of the solenoid plunger (7).