Valve Installation Points

1. Many valves are directional

For example, stop valve, throttle valve, pressure reducing valve, check valve, etc., if installed upside down, it will affect the use effect and life (such as throttle valve), or it will not work at all (such as pressure reducing valve), or even Cause danger (such as check valve). -General valve, there are direction signs on the valve body. If not, it should be correctly identified according to the valve working principle.

The valve cavity of the globe valve is asymmetrical from left to right. The fluid must pass through the valve port from bottom to top, so that the fluid resistance is small (determined by the shape), and the opening is labor-saving (because the medium pressure is upward), and the medium does not press the packing after closing, which is convenient for maintenance. , This is the reason why the shut-off valve cannot be reversed. Other valves also have their own characteristics.

2. The valve installation position must be easy to operate

Even if the installation is temporarily difficult, it is necessary to consider the long-term work of the operator. It is best to keep the valve handwheel flush with the chest (usually 1.2 meters from the operating floor), so that it is easier to open and close the valve. The hand wheel of the floor valve should be upwards, do not tilt, so as to avoid awkward operation. The valve of the wall machine and the equipment should also leave room for the operator to stand. It is necessary to avoid operating from the sky, especially acid and alkali, toxic media, etc., otherwise it is very unsafe. Do not install the gate upside down (that is, the handwheel is down), otherwise the medium will remain in the valve cover space for a long time, which will easily corrode the valve stem, and it is contraindicated by certain process requirements. At the same time, it is extremely inconvenient to replace the packing. The exposed stem gate valve should not be installed underground, otherwise the exposed stem will be corroded due to moisture.

When installing the lift check valve, ensure that its valve flap is vertical to allow flexible lifting. For the swing check valve, ensure that its pin shaft is level when installing it so that it can swing flexibly. The pressure reducing valve should be installed upright on a horizontal pipe and not inclined in all directions.