Pressure-Sustaining Control Valves ensure safe and efficient system operation by precisely maintaining the pressure at the valve inlet. When the line pressure reaches the set level, the valve automatically opens, allowing the pump motor to start without load in pumping systems. By preventing positive pressure waves that pumps can create during startup, they extend equipment life and increase system safety. They maintain constant inlet pressure control, unaffected by fluctuations in flow rate. When flow stops, they seal completely, preventing water leakage. Their durable construction, low maintenance requirements, and reliable operation make them an ideal solution for any water system requiring pressure control.