| 摘要 |
<p>A multi-position pressure relief valve settable to operate at different pressure limits includes an adjustment rod, a valve bias spring and a valve member extending coaxially with one another, the axial spacing between the rod and the valve member determining the pressure limit for the valve. The rod carries a pin adapted to engage a stepped surface of a limit select member, the steps defining a plurality of stop positions for the rod, and each stop position corresponding to a different pressure limit setting. A control knob attached to the rod enables the rod to be manipulated to locate the pin in the stop position corresponding to the pressure limit desired.</p> |
