Reduced pressure pneumatic valve selection and points for attention

Reduced pressure pneumatic valve selection principle


the reduced pressure pneumatic valve inlet pressure fluctuations should be controlled in 80% ~ 105% of inlet pressure set value, such as more than the range, reduced pressure pneumatic valve performance will be affected.


1, often reduced pressure of the pneumatic valve pneumatic valve after pressure P2 should be less than before the pneumatic valve pressure of 0. Five times, namely the P2 & lt; 0. 5P1。


2, reduced pressure pneumatic valve of each leg spring applies only within a certain range of outlet pressure, beyond the scope of a spring should be replaced.


3, working in a medium temperature is higher, generally choose guiding type piston vacuum pneumatic valve or guiding type vacuum pneumatic valve bellows.


4, medium for air or water, Liquid) Occasions, general appropriate chooses direct acting diaphragm vacuum pneumatic diaphragm pressure relief valve or the guide type pneumatic valve.


5, medium for steam, appropriate chooses the guide piston vacuum pneumatic valve or pilot bellows type pressure relief valve.


6, for operation, adjustment and maintenance convenience, vacuum pneumatic valve should be installed in horizontal pipe runs.


in accordance with the requirements of using the selected decompression pneumatic valve type and voltage regulation accuracy, then choose the size according to the maximum output flow required. 1 mpa. Reduced pressure pneumatic valve is generally installed in the water gas filter, oil mist device or setter, and pay attention to answer against its import and export; Pneumatic valve should relax the knob when not in use, in order to avoid diaphragm often compression deformation and affect its performance.