Sprinkler system control device

摘要

A sprinkler system including at least one sprinkler head and a source of supply water having a control device located in a fluid flow line between the source of supply water and each sprinkler head for automatically shutting off the flow of supply water through the sprinkler head in response to a predetermined increase in force of fluid flow. The control device includes a housing having an interior flow path with an upstream opening and a downstream opening. The control device includes a ball valve assembly in the housing. The ball valve assembly includes a valve seat at the downstream opening and a cooperating compressible valve ball which is seated in the valve seat when actuated. During normal operation the ball is located at the upstream end of the housing behind an adjustable ball stop assembly formed by a series of fixed and adjustable stops which form an adjustable size opening. When a predetermined fluid flow force is experienced such as when a sprinkler head is broken or removed, the force of the increased fluid flow will compress the ball allowing it to pass through the ball stop assembly opening and engage the valve seat at the downstream end preventing fluid flow to the sprinkler heads.