This invention discloses a regulating valve with integrated
pressure reduction and relief functions, relating to the field of valve technology. It includes a valve body and a
valve seat assembly, an
actuator assembly, and a pressure regulating
assembly connected to the valve body. The
valve seat assembly includes a
valve stem, a
valve seat, and a valve core that mates with the valve seat; one end of the
valve stem is connected to the valve core. The
actuator assembly includes a lower diaphragm cover, a diaphragm, and an upper diaphragm cover, all mounted on the
valve stem from bottom to top. A deformable chamber for pulling the valve stem is formed between the diaphragm, the upper diaphragm cover, and the lower diaphragm cover. The valve body includes an upstream chamber and a downstream chamber that are interconnected. The downstream chamber and the deformable chamber are connected through a main pipeline equipped with a pressure reducing valve. A
branch pipeline is provided on the main pipeline, and a
relief valve is provided on the
branch pipeline. Under static pressure holding conditions, when leakage occurs at the valve core and the downstream
water pressure is too high, the
relief valve discharges some of the downstream water, reducing the downstream pressure and preventing the downstream pipeline from
bursting. Furthermore, the pressure reducing valve ensures that the pressure acting on the
actuator assembly is not excessive and could not cause damage.