| 摘要 |
Valve for elimination a quckly transition of pressure in pipeline. Valve has function a protection of pipeline from quickly transition of fluid pressure, in all range, what is construction made that employ a hydraulic force of fluid, on the same area, on above side of sealing head (5) and down side of sealing head (5), and nevertheless the pressure on the down side of sealing head (5) will urgently change, due to the opening of valve will begin, until the rpessure on above side of sealing head (5) will change with delay and depend of openly a needle valve (16) on by-pass pipeline (15), which is across the nuts (17) clipped with down flange (1) and uperr flange (2), due to the valve will be open, to momentary when the rpessure again equalize with above and down side of sealing head (5), while will force of spring (6) execute a closure of valve. |
