Valve device e.g. pressure regulators, has valve piston seal that acts tightly against valve control edge in unactuated rest position of valve device and is moved away when valve device is actuated

摘要

The valve device (1) has a valve piston (5) arranged in a valve housing (2) having reciprocable valve port and valve piston seal (40,50). The valve piston seal acts tightly against a valve control edge (20) in an unactuated rest position of the valve device and is moved away when the valve device is actuated. An independent claim is included for method for operating valve device.