| 摘要 |
<p>The valve according to this invention has the casing through-channel (2), which is elbow-shaped or bend-shaped, and the straight line passing through the ball valve body (1) centre, when the ball is in fully open position, passes the through-channel (2) at both its ends. The method according to this invention consists in that after each single flow of liquid through the valve, from inlet to outlet, the alternative liquid flow is directed from the delivery side of an alternative pumping installation to the outlet or to the second (alternative) inlet of the valve through-channel (2), and the outflow takes place from the elbow-shaped (bend-shaped) valve part.</p> |
