scotch yoke actuator

Before the installation must be consulted to read the instructions for the correct installation, to ensure that it is accurate and tight work.

  1. Check that all parts of the pneumatic butterfly valve are not missing and the model is correct before installation, check that there is no debris in the valve body and that there is no blockage in the solenoid valve and silencer
  2. Place both the valve and cylinder in the closed state.
  3. Bump the cylinder to the valve, (installation direction is parallel or perpendicular to the valve body can be), and then see if the screw hole is right, there will not be too much deviation, such as a little deviation, and the cylinder body will turn a little on it, and then the screw will be tightened.
  4. after the installation is completed, the pneumatic butterfly valve for commissioning (under normal circumstances the supply pressure is 0.4 ~ 0.6MPa), commissioning operation shall be manually operated solenoid valve opening and closing (the solenoid valve coil power failure after the manual operation can be effective), observe the opening and closing of the pneumatic butterfly valve. Suppose the valve is found to be a little strained at the beginning of the opening and closing process during the commissioning operation, after which it is normal. In that case, the cylinder stroke needs to be adjusted to a smaller size (adjust the stroke adjustment screws at both ends of the cylinder to the inside at the same time, and when adjusting, the valve needs to be run to the open position, and then the air source is turned off and adjusted again) until the valve opening and closing action is smooth and closed without leakage. It should also be noted that the adjustable silencer can adjust the opening and closing speed of the valve, but not too small, otherwise, it may cause the valve not to act.
  5. The butterfly valve should be kept dry before installation and should not be stored in the open air
  6. Check the pipeline before installing the butterfly valve to ensure that there are no foreign objects such as welding slag in the pipeline
  7. Butterfly valve body manual opening and closing resistance are moderate, and butterfly valve torque and the selected actuator torque match.
  8. The flange specification for the butterfly valve connection is correct, and the pipeline butt flange matches the butterfly valve flange standard. It is recommended to use special flanges for butterfly valves and not flat welded flanges.
  9. Confirm that the flanges are welded correctly, and the flanges shall not be welded again after the butterfly valve is installed to avoid scalding the rubber parts.
  10. The installed pipe flange should be aligned and aligned with the butterfly valve put in.
  11. Fit all the flange bolts and tighten them by hand to confirm that the butterfly valve is already aligned with the flange, then carefully open and close the butterfly valve to ensure flexible opening and closing.
  12. Open the valve completely and tighten the bolts with a spanner in diagonal order without washers, do not over-tighten the bolts to prevent serious deformation of the valve ring and excessive opening and closing torque.