New all-weather breathing pneumatic valve type selection and operation pressure standard

new all-weather breathing pneumatic valve performance standard SY - completely conform to the oil industry The provisions of the. Pneumatic valve plate with four fluorine material resistant to low temperature freeze protection performance is good; Breathing air is also a kind of pneumatic valve, safety valve which is fixed on top of the tank ventilation device to ensure the normal state of tank pressure, prevent tank overpressure or vacuum that tank suffered damage and reduce the volatilization loss main body, to recommend breathing today the technical parameters of pneumatic valve hope for you to understand and know breathing pneumatic valve technical help!
respiration characteristics of pneumatic valve pneumatic valve pneumatic valve body can withstand. Mpa water pressure and no penetration and deformation phenomenon. Breathing pneumatic valve of low temperature resistance in the air relative humidity is greater than the minimum temperature of - % ℃, after hours of frozen its opening pressure pneumatic valve plate conform to the requirements of the job stress, ( Allow the differential plus or minus pa) 。
the breath of the pneumatic valve type
the first kind is or reach a certain pressure for breath; Another is designed in pure only exhaled don't inhale, can use two appropriate pressure to understand it as a one-way pneumatic valve instead. The second breath pneumatic valve is similar to a one-way non-return pneumatic valve can breathe out cannot breathe in, inward outward as soon as the system of the gas pressure inside the after breathing pneumatic valve to vent to ensure that the system pressure constant.
breathing pneumatic valve working principle is to use spring limit pneumatic valve plate or determined by the positive and negative pressure or breath. Pneumatic valve should have a breathing discharge function of two aspects of positive pressure and negative pressure, specific: when container under positive pressure breathing pneumatic valve open breath gas discharge positive pressure; When container under negative pressure breathing pneumatic valve open suction gas discharge pressure. Thus guarantees the pressure within a certain range to ensure the safety container. The respiratory pneumatic valve selection of

and the requirement of the requirements of the installation position and temperature range, such as: cold areas should choose all-weather breathing pneumatic valve installed in the pipeline should be chosen in the pipeline pneumatic valve to breathe.
, mechanical breathing pneumatic valve control should be adapted to the bearing capacity of the pressure. , mechanical breathing of the specifications of the pneumatic valve should satisfy the biggest breathing in and out of the oil tank gas flow requirements.
the breath of the pneumatic valve installation and maintenance should be paid attention to the following items: all kinds of breathing pneumatic valve should be installed vertically. Breathing the pneumatic valve outlet should be no resistance to avoid compression phenomenon. Breathing pneumatic valve before installation should be dedicated to test sealing. For use in the breathing air check valve should be done regularly.
breathing pneumatic valve operating pressure standard
grade A positive pressure: Pa ( Millimeter water column pressure: Pa ( Millimeter water
B level positive pressure: Pa ( Millimeter water column pressure: Pa ( Millimeter water level positive pressure:
C Pa ( Millimeter water column pressure: Pa ( Millimeter water column