ZW221 and ZW222

One Way and Two Way Altitude Level Control Valve

ZW221 and ZW222

One Way and Two Way Altitude Level Control Valve

• ZW221 One Way Altitude Level Control Valve controls water level in a tank or reservoir
• ZW222 Two Way Valve controls water level while also allowing reverse flow, so only one line is needed to the tank/reservoir. When upstream supply pressure drops below tank pressure, main valve opens,
• Accurately controls water level based on relative pressure, without the need for floats and sensors
• Epoxy coating and stainless steel braided hoses on pilotry come standard for corrosion resistance and simplified pilotry repairs
• 150 class flanged, 300 class flanged, grooved, and threaded end connections available for installation versatility
• Globe, reduced port globe, and angle bodies available
• Standard valves come with one set point – the valve opens to fill the tank and will close drip-tight once the high water level is reached
• Adjustment ranges available from 5’ to 230’
• "D" Delayed Opening/Dual Set Point Option delays opening of valve until water reaches a lower set point