| 摘要 |
<p>The sprayer has a fluid tank and a powered pump, whose suction pipe under interconnection of a change-over valve discharges in a lower area of a storage tank and an external filling pipeline. A return pipe (23) is discharged between the pump and the valve of the suction pipe. An opening check valve (24) is arranged in the pipe (23) with a pressure in a range of 0.6 bars before junction of the return pipe in the suction pipe.</p> |
