The rev and raise safety pneumatic valve nominal diameter and flow of the diameter of the relationship

security pneumatic valve nominal diameter and flow of the diameter of the relationship. We must first understand what is the nominal diameter, what is the runner diameter.
security pneumatic valve nominal diameter, the nominal diameter, also known as the average diameter, refers to the safety of pneumatic valve ( Standard diameter of nozzle after standardization, expressed in DN, the unit mm.
security pneumatic valve nominal diameter is reference to a numeric value, relationship with processing size is not strict. Safety of the pneumatic valve nominal diameter values is the average of the take the outside diameter of the inner diameter of the pneumatic valve, habits are also referred to as the aperture.
security pneumatic valve port diameter, defined as security pneumatic valve corresponds to the diameter of the port area, also called the throat diameter. Runner diameter should be less than the nominal diameter.
general domestic security pneumatic valve is divided into full rev. According to the height of open type safety pneumatic valve, pneumatic valve and raise safety all rev and raise safety pneumatic valve nominal diameter and flow of the diameter of the relationship between basic according to the following formula.
all rev type pneumatic safety valve nominal diameter larger than the runner diameter 2, such as security DNmm pneumatic valve diameter, the runner diameter is DNmm, DNmm apart; Security DNmm pneumatic valve diameter, the runner diameter is DNmm, DNmm apart.
safety mini rev type pneumatic valve nominal diameter larger than the runner diameter level, such as security DNmm pneumatic valve diameter, the runner diameter is DNmm; Security DNmm pneumatic valve diameter, the runner diameter is DNmm, and so on. （ 山)