| 摘要 |
The arrangement (10) has an upstream backflow preventor (18) arranged in a housing (12). A downstream backflow preventor (20) is arranged coaxial to the preventor (18), and a discharge valve includes a valve seat (74) connected with a downstream side of a spring-actuated piston (76). The piston is moved perpendicular to an opening direction of the preventors, and is pressurized with input pressure over a connection duct (32) against resilience of a tensioning spring (84). The duct is directed to the preventor (18), and the valve seat and piston are formed as an integrated plastic element. |
