Valve

摘要

A valve device (1) comprising; a body portion (2) having a plurality of openings, a valve seat (6) located within said body portion (2), an end stop (4,8), corresponding to an opening of said body portion (2), said end stop (4,8) comprising a port portion (38,39) through which fluid may flow, and a nozzle (33,35), in fluid communication with said port portion (38,39), said nozzle (33,35) configured for sealing against said valve seat (6) and thereby preventing flow through the valve device (1), the valve device (1) being openable by relative motion of said nozzle (33,35) with respect to said valve seat (6), and adjustment means configured to allow independent adjustment of the location of said nozzle (33,35) with respect to said valve seat (6).

主权项

1. A valve device comprising:
a body portion having a plurality of openings, a valve seat located within said body portion, an end stop, corresponding to an opening of said body portion, said end stop comprising a port portion through which fluid may flow, and a nozzle, in fluid communication with said port portion, said nozzle configured for sealing against said valve seat and thereby preventing flow through the valve device, the valve device being openable by adjusting a relative position of said nozzle with respect to said valve seat, and adjustment means configured to provide adjustment of a position of said end stop with respect to said body portion for controlling flow of fluid through the valve device, wherein the flow is controllable by use of said adjustment means to provide proportional control; wherein the adjustment means comprises a piezoelectric device to apply a mechanical force to said body portion so as to open said valve device and the adjustment means is actuatable by varying a piezoelectric voltage.