Working principle of hydraulic safety valve
Hydraulic safety valve is also called Y-type hydraulic safety valve. Y-type hydraulic safety valve is an important accessory installed on the top of the oil tank to protect the safety of the oil tank. When the mechanical breathing valve fails, the hydraulic safety valve can replace the mechanical breathing valve for exhaust or deflation.
The pressure or vacuum value controlled by the Y-type 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 volatile in summer), slow evaporation, and low freezing point (not solidified in winter) (such as light diesel, solar oil or transformer oil) as the sealing liquid (referred to as the sealing liquid).
Hydraulic safety valve is a kind of safety protection valve. Its opening and closing parts are normally closed under the action of external force. When the pressure of the medium in the equipment or pipeline rises and exceeds the specified value, it will automatically open. It is prevented by discharging the medium to the outside of the system. The pressure of the medium in the pipeline or equipment exceeds the specified value. Safety valves belong to the category of automatic valves, which are mainly used in boilers, pressure vessels and pipelines. The control pressure does not exceed the specified value, which plays an important role in protecting personal safety and equipment operation. According to the opening height of the safety valve disc, it can be divided into a micro-lift safety valve and a full-lift safety valve. The opening stroke height of the micro-lift safety valve is: ≤0.05d0 (minimum discharge throat diameter); the full-lift safety valve opens The height is ≤0.25d0 (minimum discharge throat diameter).
The working principle of the hydraulic safety valve is: when the pressure is too high, it will conduct and put the hydraulic oil back into the cylinder.
Hydraulic safety valve function1. The hydraulic safety valve is a safety backup device for the (flap-type) breathing valve. Its inhalation and exhalation action pressure is slightly higher than that of the (flap-type) breathing valve. Once the breathing valve fails or works in winter When the flap is frozen, the liquid seal of the hydraulic safety valve is destroyed to protect the oil tank from damage.
2. The hydraulic safety valve is installed on the top of the oil tank and used in conjunction with the breathing valve.
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