Emergency Drain Valve

Do you know what the emergency relief valve is used for? In fact, it can be said that it is a safety device to protect the safety of the tank, because these tanks will sometimes appear due to external forces or internal influences that lead to a sharp rise in pressure, once more than the rated pressure, it is more dangerous, this time you need this relief valve to release the excess pressure in time to protect the tanks will not explode. Of course, want the emergency relief valve to play its role, the correct installation method is necessary, then we know the installation method? If you are not sure, the following editor will talk to you in detail about its use and installation methods.

The use of emergency relief valve:

Emergency relief valve is to provide emergency pressure relief exhaust function of the tank safety protection devices. When the tank is subject to external forces or internal influences pressure rises sharply to the rated pressure emergency relief valve when the beginning of the release of excess pressure. When the pressure returns to the set pressure, the cover is reclosed to keep the tank at atmospheric pressure. Emergency pressure relief valve and vacuum relief valve can perform emergency pressure relief and vacuum pressure relief.

In an emergency situation (where the outside of the tank is exposed to fire), a normal venting device may have too small a discharge to prevent the tank from being overpressurized due to an emergency situation. Emergency relief valves have the necessary pressure relief and vacuum relief devices to keep the tank within safe working limits. An integral vacuum valve provides additional protection against collapse of the tank due to excessive steam or vacuum.

Emergency relief valve installation method:

1, before carrying out the installation need to check the equipment, when there are signs of physical damage or internal contamination, the valve must be disassembled, cleaned and inspected before installation.

2, flange protective cover should need to be removed before putting into use.

3, in order to avoid damage to the flange surface, about the valve body has three rings are used to lift and positioning, and all valves should be installed using three lugs on the valve body.

4, need to check the container or tank, and need to pay attention to whether the flange is in a horizontal state.

5. The gasket should then be checked to ensure that the material is suitable for the valve.

6, all the bolts and nuts need to use the appropriate thread lubricant, such as stainless steel fasteners, you can choose anti-seize lubricant, such as molybdenum disulfide.

7、The washers need to be aligned with the bolt circle.

8、Carefully install the valve body on the interface, while maintaining the gasket with the flange, to install the bolt and tighten the nut.

9, you can torque all fasteners in accordance with the recommended value of half of the installation, need to follow the staggered pattern of installation.

The role of the emergency relief valve is still quite large, the protection of storage tanks is a very important job, otherwise, once the explosion, the consequences are unimaginable, so we must be installed to ensure safety.