Pressure regulating valve

The utility model relates to a pressure regulating valve which comprises a platform, a spring, sealing rings, a piston, a cap nut, a spring seat, a cruciform valve body, a casing of a pressure lever, a drip sealing cover and a regulating screw. A piston upper hole and a piston lower hole are respectively arranged on the top and the bottom of the piston in the cruciform valve body along the import direction and the export direction of a water flow. Sealing rings are arranged on both ends of the piston, and a drip hole is arranged on the drip sealing cover. The utility model is convenient to operate by cookers, and cooling water can be adjusted and controlled. The utility model reduces production cost, saves the tap water used in cooling by more than 50%, avoids the waste of water resources, and achieves the purposes of production and energy saving.