The safety valve is mainly composed of three parts.

The safety valve is mainly composed of a valve seat, a valve disc (spool) and a loading mechanism. The valve seat is integral with the valve body, and some are assembled with the valve body, which is in communication with the device. The valve flap is often attached with a valve stem that snaps onto the valve seat. Above the valve disc is the loading mechanism, the size of the load can be adjusted. When the pressure in the device is within a certain working pressure range, the force acting on the valve disc by the internal medium is less than the force exerted on the valve by the loading mechanism, and the difference between the two forms a sealing force between the valve flap and the valve seat. The valve flap is pressed against the seat and the media of the device cannot be discharged.

When the pressure in the device exceeds the specified working pressure and reaches the opening pressure of the safety valve, the force exerted by the internal medium on the valve is greater than the force exerted by the loading mechanism on the valve, so that the valve flap leaves the valve seat and the safety valve opens. The medium inside is discharged through the valve seat. If the displacement of the safety valve is greater than the safety relief of the equipment, the pressure inside the equipment gradually decreases, and after a short period of exhaust, the pressure drops back to the normal working pressure.

The safety valve is closed or opened by the force of the medium on the valve flap and the force of the loading mechanism to prevent the device from overpressure.

The safety valve can be automatically opened and closed according to the working pressure, and is generally installed on the equipment or pipeline of the closed system to protect the system. When the pressure in the equipment or pipeline exceeds the specified value, the pressure relief is automatically turned on to ensure that the medium pressure in the equipment and pipeline is within the specified value to prevent accidents.

Safety valves are safety devices designed to prevent pressure equipment and containers from rupturing due to pressure build-up or pressure inside the container. The safety valve is a safety device widely used in pressure systems such as pressure vessels, boilers and pressure pipes to ensure the safe operation of the pressure system. When the pressure of the container exceeds the design specification, the safety valve is automatically opened to discharge the high pressure inside the gas reducer to prevent damage to the container or the pipeline.

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Square Tube : Galvanized Square Tube , Square Steel Pipe , Square Hollow Section.

Product	Square tube
Specification	Section shape: square
	Thickness: 1.0mm-15mm
	Outer diameter: 15*15mm-300*300mm
	Zinc coating: >200g/m2
Standard	ASTM A500, BS1387,GB3091,ASTMA53, B36.10, BS EN1029, GB/T9711 etc
Material	Q195, Q235, Q345; ASTM A53 GrA,GrB; STKM11,ST37,ST52, 16Mn,etc.
Fabrication	Plain ends, cutting etc
Surface Treatment	1. Galvanized
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