Control valve common connection scheme

With the control valve can not be adjusted properly, as an emergency measure, can also be used to bypass valve as a control valve connected in parallel programs, control the process. To reduce costs, the large-diameter control valve to install the handwheel implementing agencies, can replace the bypass valve operation. The installation of the bypass valve should be easy to operate, with the control valve downstream shut-off valve together make up the control valve should be installed with their supporting, and at the same time to complete the construction and installation. The bypass valve nominal diameter nominal pipe of the same diameter, pressure rating is also consistent with the process pressure rating.pneumatic fitting
Actuator Mounting Typically, actuator and control valve body directly connected, but separate hydraulic actuators, long actuators, actuator and control valve body, install the implementing agencies should pay attention to the executive body of the connecting rod and mechanical moving parts should be flexible, no looseness or twist. Connecting rod length should be action in the entire travel range, flexible and reliable. When the thermal displacement control valve body is connected with the process piping, should ensure that the relative position between the actuator and the control valve body remains unchanged. The side-mounted handwheel implementing agencies and two top-loading, the installation should leave room for maneuver. Handwheel operation should be flexible and not stuck or reverse the phenomenon. Should hand wheel rotation direction of valve opening relations marked. Limit device should be adjusted to fit, play a protective role. Hydraulic actuators should be lower than the controller is installed, must be higher than the controller, the height difference should be no more than 1.0m, and the exhaust valve installed in the pipeline gas gathering, near the controller to install a check valve or Automatic shut-off valve.electric solenoid valve