| 摘要 |
A multiple purpose flow control arrangement for control of agent flows from up-stream agent sup-ply system to down-stream agent consuming fire protection system pipes, which comprises of a pipe housing (1) comprising a pipe cavity (2) and openings in the pipe cavity wall, the openings constitutes an inlet port (6), an outlet port (3) and an opening, which forms a closed end (7) by an end body (15), the arrangement comprises a seat (5) formed by the pipe cavity (2) comprising a reduced pipe cavity diameter, and in which a spool body (9) is located inside the pipe cavity (2), the spool body (9) comprises one or more openings (11) and a spool body seal (17), and the one or more openings (11) in the spool body (9) is configured for allowing agent flow through the inlet port (6) into one or more openings (11) in the spool body (9) and through the spool body to the closed pipe cavity between the spool body sealing (17) and the closed end (7) at the end body (15) of the pipe cavity (2), and where the agent apply a pressure force on the spool body (9), caused by the pipe cavity cross section area is larger than at the seat (5), causing the spool body (9) to be pressed against the seat (5), and agent can hereafter not flow from the inlet port (6) and out through the outlet port (3). |
