Adjust the choice of pneumatic valve and pneumatic valve should comply with the regulations of what?

two-way pneumatic valve, water pipe selection of appropriate percentage flow characteristic.
, steam two-way pneumatic valve, when the pressure loss is greater than or equal to. A linear flow characteristic, appropriate chooses. Less than. , appropriate chooses equal percentage flow characteristics.
and confluence tee pneumatic valve should have traffic unchanged after confluence flow characteristic, its A minus AB mouth appropriate USES equal percentage flow characteristic, B - AB appropriate USES the linear flow characteristic.
split tee pneumatic valve should have shunt traffic after constant flow characteristic, the AB - Port A appropriate USES equal percentage flow characteristic, AB - Port B appropriate USES the linear flow characteristic.
, adjust the LI of the pneumatic valve diameter should be determined by calculating flow capacity of pneumatic valve.
, air conditioning system should select leafy ethos of split type valve, climate action valve area is determined by duct sizes, and should choose according to climate action valve area climate action valve actuator, the actuator torque closed climate action valve should be reliable. Climate action valve area is too big, can choose more than one actuator parallel operation.