Y43X type proportional pressure reducing valve, beautiful appearance, reliable quality, accurate proportion, stable work, both reducing pressure and static pressure. The valve uses the pressure difference generated by the different load areas at both ends of the piston inside the valve body to change the pressure behind the valve to achieve the purpose of pressure reduction. The pressure reduction ratio of Y13X proportional pressure reducing valve is: 2:1,3:1,4:1,3:2,5:2, etc., and special ratio pressure reducing valves can also be designed according to requirements.