Around the Pump Proportioners
Accurately proportions foam concentrate in the fire pump discharge stream
Around-The-Pump Proportioning (ATP) Systems provide a simple and effective means to introduce a foam concentrate at the desired percentage to the water being discharged in a fire pump system. With an ATP System, a small portion of the discharge from the pressure side of the pump serves as a “drive motor” being recirculated through an eductor to the suction side of the pump at which point foam concentrate is drawn in at a rich ratio. At the junction point of the eductor and water suction line, the rich foam solution is mixed with the incoming water to deliver a foam solution stream at the proper concentration.
