The principle and selection of flow control pneumatic valve

here mainly refers to the manual balancing pneumatic valve, self-reliance type pneumatic valve and differential pressure regulating pneumatic valve selection. In the circulating water pump variable flow operation, manual, pneumatic valve is geometric disturbance the most benefit the operation of the pneumatic control valve; But the downside is manual operation is too much, difficult to achieve ideal control. Of circulating water pump variable flow operation, each user entry should be the ideal setting pressure difference with the outdoor temperature changes. For that, on balance type pneumatic valve, pneumatic valve differential pressure regulating, are not ideal, but there will not be out of control. So can use this type of regulating pneumatic valve, this to improve the adjusting performance of heating system is good.