P12412: UV Water Treatment Safety Valve

Pugh Chart-Pinching Devices

Pugh Chart for Pinch Devices

public/pugh_pinchdevices.JPG This chart compares different ways to pinch off the flow of water after failure has been sensed. The two that look the most promising are the modified Victor mouse trap and the guillotine trap. The Victor mouse trap utilizes a spring to snap a lever arm onto the water flow tube. While the guillotine trap would consist of a flat plate dropping onto the water flow tube.

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