Cut-off valve, throttle, valves, check valves and other valves are directional, if installed anti flip the throttle will affect the results of life; valve does not work, check or even dangerous.
Generally valves, directional signs on the body; in case it does not, according to the valve works properly identified.
Cut-off valve left-right asymmetry of the valve chamber, the fluid from the bottom to make it through the valve orifice, so fluid resistance (determined by the shape), open effort (due to media pressure up), after the closure of the media do not pressure filler, easy to repair . That is why the non-closing valve An anti-truth. Other valves also have their own characteristics.
Position of the valve is installed, it must be accessible to operate; even with some temporary difficulties, but also for the sake of the operation of permanent staff.
The best valve hand wheel and chest aligner (generally operate from floor 1.2 meters), so that the opening and closing valves more provincial effort. Landing valve hand wheel should be facing up, do not tilt, so the operation awkward. Wall machine by the valve device, but also to set aside an operator standing room. To avoid his back operation, especially in acid, toxic media, otherwise very safe.
Do not flip gate (ie handwheel down), otherwise it would be retained in the media long bonnet space, easy to stem erosion, but also for some of the technological requirements of the taboo. At the same time replace the packing extremely inconvenient.
1, the valve to be installed vertically on a horizontal pipe, do not tilt in all directions.
2, lift check valve, when the valve is installed to ensure that its vertically to lift flexible.
3, swing check valve, the installation should ensure its pin level to swing flexible.
4, stem gate valve, do not install in the ground, or corrosion due to moisture exposure of the valve stem.
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