The pressure or vacuum value controlled by the hydraulic safety valve is 10% higher than that of the mechanical breathing valve, so it will not operate under normal conditions.
The valve uses oil with high boiling point (not easy to volatilize in summer), slow evaporation and low freezing point (not solidified in winter) (such as light diesel oil, sun oil or pressure swing oil) as sealing liquid (sealing liquid for short).
This type of valve should generally be installed horizontally in the pipeline.
A safety protection valve whose opening and closing parts are normally closed under the action of external forces and open automatically when the medium pressure in the equipment or pipeline rises and exceeds the specified value. prevent the medium pressure in the pipeline or equipment from exceeding the specified value by draining the medium out of the system.
Safety valve belongs to automatic valve, which is mainly used in boilers, pressure vessels and pipes. it controls the pressure not to exceed the specified value, which plays an important role in protecting personal safety and equipment operation.
According to the opening height of safety valve disc, it can be divided into micro-opening safety valve and full-opening safety valve, the opening height of micro-opening safety valve is ≤ 0.05dO (minimum discharge throat diameter), and the opening height of full-opening safety valve is ≤ 0.25d0 (minimum discharge throat diameter).
