Through engine valve

Through engine control valve the two spool and two seats. Fluid inflow from the left side of the icon, after two plug and seat, convergence to the right side of the outflow. Downward thrust upward thrust and lower spool on the spool suffered suffered basic balance, therefore, the entire spool suffered unbalanced force. Through engine valve features are as follows.
Suffered unbalanced force is small, the allowable pressure drop, e.g., DNl00
Seat valve to allow pressure 280kPa.pneumatic hand valve
2 large flow capacity, compared with the control valve of the same caliber, double seat valve can flow more fluid than the single-seat valve flow capacity of approximately the same caliber seat valve flow capacity is 20% to 50%. For example, the two-seater DNl00 valve flow capacity up to 160. Therefore, in order to obtain the same flow capacity, two-seat valve can be selected smaller thrust the implementing agency.steam solenoid valves
Valve body and the modification of the anti-body valve. Seat valve top and bottom double guide, simply plug and seat, in turn, will be able to install the valve body is changed anti-body valve, anti-body valve was changed to positive body valve without the need for re-election positive implementing agencies or reverse acting type. Two-seat valve structure shown in Figure 4 only the reversed position of the valve stem connection to complete.
4 large leakage. The upper of the double-seat valve, the lower valve body can not be guaranteed close, therefore, the larger the amount of leakage of the double-seat valve, the standard amount of leakage of 0.1% C. The seat valve plug and seat of different materials or for low or high temperature applications, the material linear expansion, caused by leakage will be greater.mini solenoid valve