Security pneumatic valve nominal pressure relationship with setting pressure

security pneumatic valve setting pressure and nominal pressure. Nominal pressure refers to the maximum allowable stress in a number of pneumatic valve body, such as nominal pressure for PN and PN, PN and PN; Setting refers to the spring under the action of pressure, pressure reaches the set pressure value, spring the jacking to leak pressure pneumatic valve stem. Such as the setting for pressure. Mpa、. Mpa、. Mpa, etc. Nominal pressure refers to the safety of the pneumatic valve pressure rating, which means security pneumatic valve highest pressure. Pneumatic valve setting pressure of safety refers to the safety of pneumatic valve internal pressure is reached the takeoff. Setting pressure is adjustable, but setting pressure also there is a hierarchical relationship, usually within the scope of the standard set by the adjustment. See below safe pneumatic valve setting pressure scale:

security pneumatic valve pressure level range refers to the scope of the application of the pneumatic valve pressure safety. Because of the limitation of pneumatic valve has the highest use safety pressure ( Mainly consider safety factor) , also need to have the lowest pressure limit ( Mainly consider using sensitivity) 。 Elected security after pneumatic valve type, should be used according to the working condition of the work required set pressure, the safe takeoff pressure pneumatic valve in accordance with the relevant regulations, such as pneumatic boiler safety valve regulation: pneumatic valve opening pressure low security, the setting pressure shall be the working pressure. Times, and should not be less than the pressure of work. MPa； Opening pressure of higher security pneumatic valve, the pressure setting shall be the working pressure. Times, and should not be less than the pressure of work. MPa, and check regularly, according to relevant regulations after the safety of the pneumatic valve adjustment should be to manipulate the 'seal'.
in the security model selection of the pneumatic valve, general is to refer to the setting pressure is much, and then make a decision to choose which level of the safety of the nominal pressure pneumatic valve. Such as the setting for pressure. Mpa（ Kg) , then choose nominal pressure pneumatic valve for PN's safety, if choose the nominal pressure of PN safe pneumatic valve, can also, of course, but it is not necessary to cause the waste of materials.