| 摘要 |
<p>The pressure limiting valve (1) for the air supply of especially a rail vehicle's brake system has a second double seat valve operated by a working piston (30) and integrated in the shut-off component (46) of a first seat valve. A third and a fourth seat valve respectively comprise a shut-off component (72,76) acting against a respective valve seat (70,74), whereby with the shut-off component lifted from the third valve seat a primary pressure chamber (8) communicates with a secondary pressure chamber (12), and with the shut-off component lifted from the fourth valve seat the secondary pressure chamber communicates with a ventilation port (20).</p> |
