| 摘要 |
<p>A high pressure water control device comprising a water inlet 10, a high pressure water outlet 12, a low pressure water outlet 13 and a valve 19 for selectively communicating the inlet with one or other of the outlets. The valve is a spool valve. The spool valve 19 may slide within a sleeve 20 which has an external annular groove 25 and ports connecting the groove with the sleeve interior. The water control device may be used for jetting or cleaning apparatus, eg dump guns.</p> |
