800X differential pressure by-pass valves
800X differential pressure by-pass valve is composed of main valves, pressure control valves, needle valves, ball valves, micro-filter and pressure gauge hydraulic control over the system. Through specially designed valve control room, compare the pressure signal, output of the main valve opening signal, control valve, which controls the import and export of the main valve on the differential pressure set value.
When the main valve pressure difference changes in import and export, taking over taken over a and b pressure difference changes, this variable valve opening. Guide valve opening pressure-difference control room through a tube discharge increased water, main valve control pressure drop increase valve opening, main valvepressure difference between import and export small. Conversely, if the main valvepressure difference between import and export small valve opening smaller, mainvalve control pressure, promote decrease and open the main valve and main valvedifferential pressure increases. This negative feedback effect makes the main valveon the import and export value of differential pressure stability at the top. Set theneedle valve and pilot valve spring pressure setting main valve pressure differencebetween imports and exports.