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Automatic Control Valves


S116-52, S1116-52

Pressure Relief and Surge Anticipator

Lead Free* Models Available


The WATTS ACV Combination Surge Anticipator and Pressure Relief Control Valve is designed to minimize the effects of water hammer and pressure surges resulting from: 1) Normal pump starting and stopping operations or 2) Mechanical or electrical power failure situations. The valve senses hydraulic pressure changes above and below the adjustable setpoints of the pilot control system directly from the pump station discharge header.

High Pressure Relief Operation: When discharge header pressure exceeds the adjustable setpoint, the valve opens quickly to dissipate the high pressure surge.

Low Pressure Opening Operation (Surge Anticipation): When discharge header pressure falls below the adjustable setpoint, the valve opens in anticipation of the returning high pressure wave. This condition normally occurs during a mechanical or electrical power failure situation.
"stored" main valve cover pressure.

If header pressure does not "recover" above the low pressure opening setpoint, "stored" pressure in the unique hydraulic accumulator system allows the valve to close, avoiding system siphonage or draining the pumping system.

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.