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The Model QX025G Combination Pressure Reducing and Pressure Sustaining Valve

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The Model QX025G Combination Pressure Reducing and Pressure Sustaining Valve

The Model QX025G Combination Pressure Reducing and Pressure Sustaining Valve
automatically performs two independent functions. It maintains a constant downstream pressure, regardless of fluctuating demand and sustains the upstream pressure to a pre-determined minimum.The pressure reducing control responds to slight variations in downstream pressure and immediately repositions the main valve to maintain the desired downstream pressure. The pressure sustaining control is normally held open by the upstream pressure,but modulates should the pressure drop to the control set point.This, in turn, modulates the main valve to sustain the desired upstream pressure.