1. This valve can only be used as a fully open or fully closed valve, and cannot be used as a regulating valve.
2. The transmission parts should be kept clean and lubricated regularly.
3. Account opening or closing is applied to the handwheel or actuator, and try not to use levers or other tools.
4. The flow direction of the medium is high in and low out (reverse flow). When installing, ensure that the flow direction of the medium is consistent with the direction of the arrow on the valve body.
5. The anti-scouring stop valve can be installed at any position on the pipeline, and the valve of carbon steel or contract material can be selected according to the temperature of the medium.
Anti-scouring cut-off valve, also called anti-scouring shut-off valve, is a forced-sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the valve from the body of the disc, the resistance that the operating force needs to overcome is the frictional force of the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the valve stem will bend failure. According to the connection mode, it is divided into three types: flange connection, threaded connection, and welding connection. Since the appearance of the self-sealing valve, the medium flow direction of the shut-off valve is changed from the disc to petition and enters the valve cavity. At this time, under the action of the medium pressure, the force of closing the valve is small, while the force of opening the valve is large, and the diameter of the valve stem can be corresponding To reduce. At the same time, under the action of the medium, this type of valve is also tighter.
Post time: Mar-08-2024