The damage of intake branch pipe control valve will cause insufficient intake pressure in cylinder, insufficient combustion, poor mixing ratio and ineffective acceleration.

Precautions for regulating valve:

1. The control valve should be stored in a dry room, both ends of the channel must be blocked, and stacking storage is not allowed.

2. The control valve stored for a long time should be inspected regularly to remove the dirt, and anti rust oil should be applied on each moving part and processing surface to prevent rust.

3. The valve should be installed on the horizontal pipeline, and vertical installation is required. Stem up.

4. The installation must be carried out according to the medium indicated by the arrow in the figure.

Extended data

Treatment method of control valve:

1. Cleaning method. The welding slag, rust and slag in the pipeline cause blockage or jamming in the throttle port, guide part and balance hole of the lower valve cover, resulting in tensile and scratch on the surface of valve core and guide surface, and indentation on the sealing surface. This often occurs in the new commissioning system and in the early stage after overhaul. This is a common fault.

In this case, it is necessary to remove the slag and remove the slag. If the sealing surface is damaged, it should also be ground; at the same time, the bottom plug should be opened to flush out the slag falling into the lower valve cover from the balance hole, and the pipeline should be flushed. Before putting into operation, the control valve should be fully opened and the medium should flow for a period of time before normal operation.

2. External erosion method. When the ordinary valve is used to regulate the medium which is easy to precipitate and contains solid particles, it is often blocked at the orifice and the guide, and the flushing gas and steam can be connected to the bottom plug of the lower valve cover. When the valve is blocked or stuck, open the external gas or steam valve to complete the flushing work without moving the control valve, so that the valve can operate normally.