Foam proportioning system with low-end controller

Details Foam proportioning system with low-end controller Foam proportioning system with low-end controller

2011-08-16

2011-08-16

Gorman, Darren W (Department: 3752)

Fire extinguishers

Fluid systems

Plural source, mixing in transit

C169S015000, C169S016000, C169S024000, C239S124000, C239S417500

Reexamination Certificate

active

07997348

ABSTRACT:
Embodiments of the invention provide a foam proportioning system. The foam proportioning system can include a foam pump, at least one foam line, a divert, and at least one controller. The divert can direct a portion of a flow of a liquid foam concentrate downstream of the foam pump back through the foam pump. The controller, which can be in communication with the foam pump and the divert, can be configured to automatically maintain a minimum flow rate of the liquid foam concentrate through the foam pump.

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