bypass valve
DN 100mm~600mm
PN 0.25~4MPa
Pressure test seat 1.1*PN
shell 1.5*PN
Medium temperature ≤425℃
medium Steam, gas etc.
Working pressure 0.8*PN

Hydraulic needle valve is mainly used for the inlet valve of the bypass pipe Hydropower Station. By the governor as a working oil source , control valve opening and closing .