Serial pressure reduction
Leakage and burst protection
High differential pressure systems
Protection against cavitation damage
Throttling noise reduction
The downstream pressure is applied as the closing force on the top side of both the piston and the seal disk areas. The upstream pressure is applied as the opening force on the .bottom side of the seal disk area The net force, resulting from the two opposing dynamic forces acting on the actuator's piston and seal, determines the degree to which the valve is open. The valve seeks the point where these forces are equal. As the ratio of the areas of the seal disk .and the piston is constant, the ratio of the upstream and downstream pressures is constant as well A rise in downstream pressure causes a momentary increase of the closing force. As a result, the valve throttles closed reducing .downstream pressure according to the constant ratio .When demand is zero, downstream pressure rises in proportion to the ratio, causing the valve to shut off
Structure and function
YB43X, YB13X proportional-type reducing valve.This valve is mainly constituted by the body, inlet flange, piston, large cylinder sleeve, small cylinder sleeve, outlet flanges and o-shaped rings, sealing gaskets, etc. proportional reducing valve makes use of different sectional area of two float piston ends to constitute the front-back pressure difference, and change the back-pressure to achieve the purpose of pressure-reducing. Proportional reducing valve is of unique structure, superior performance, large flow, switch smooth, without noise, stable ratio of reduced pressure namely: "reducing dynamic pressure" and "reducing static pressure", and has function:reduce and eliminate the phenomenon of water hammer to water supply pipe, eliminate the instruments of vibration,protection pipe and water conservation.
Standards pressure ratio for 2:1, 3:1,4:1, 5:1, and 3:5:2 etc, designed according to user's requirements of special proportion of valve.
Dimensions & constructral diagram
Y43X main technical parameter of fixed proportion reducing valve