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Multi-way drain valve must be mounted vertically on the horizontal pipe. Clean the pipe before installing the valve. 1. Turn the handwheel stem counterclockwise to drive the valve core to gradually move up and the sealing surface to disengage. The diversion seat on the valve core gradually moves out of the seat hole to form a narrow slit gap. The medium passes through the symmetrical orifice Into the seat inside, a small amount of medium out through the slit, the gradual reduction of system pressure. 2. Continue turning the handwheel counterclockwise to move the valve spool upwards. The orifice on the guide seat moves out of the valve seat cavity. More media is discharged smoothly after throttling through the guide seat and the valve sleeve. 3. Continue turning the handwheel counterclockwise to move the spool up to the fully open position. At this point, the media pressure is greatly reduced and large quantities of impurities are removed directly from the orifice of the valve sleeve and form a vortex at the inverted seal seat Clean the sealing surface to prevent impurities from adhering to the sealing surface. â‘¡ valve closing process: 4. Turn the valve clockwise, the valve stem driven spool down, this time the sewage has ended, the system pressure is low, the valve sleeve orifice area gradually reduced, the guide sleeve near the valve seat, and Change the flow of medium, the medium through the throttle to a certain speed through the valve core and valve sealing surface, and gradually strengthen the sealing surface of the cleaning efforts. 5. Continue to rotate the handwheel, the guide seat on the valve core into the valve seat hole, the formation of narrow-slot throttling, due to the sewage close to the end of the media has less impurities, narrow gap between the guide sleeve and the seat to prevent the residual Of the tiny impurities flow into the sealing surface, the medium flows out quickly through the slit, thoroughly clean the sealing surface, to ensure that the sealing pair contacts zero leakage. 6. Continue turning the handwheel until the valve plug contacts the seal seat. Achieve sealing. Sewage valve body and the valve cover with a clamp connection, sewage valve structure is compact, easy to remove the drain valve, drain valve easy to install, drain valve branch pipe for the welding connection. Sewage valve with self-tight pressure seal structure, sewage valve sealing ring made of asbestos packing formed, the higher the pressure of the sewage valve medium, the better the sealing. Drainage valve medium flow from the branch into the sewage. Sewage valve flap for the piston structure and boronizing treatment. Drain valve erosion and corrosion long service life.
The headlamp is a kind of lighting tool worn on the head, mainly used to free the hands of lighting. The design of the headlights allows users to carry out various activities, such as night walking, camping, exploring, etc., without the need for hand-held lighting, thereby freeing up both hands for other operations. Headlamp is usually composed of headlamp body, charger, rechargeable battery, power socket and cable, etc., to provide stable lighting effect. The use of headlights is widely used, not only for outdoor activities, but also for some indoor activities, such as night reading, repair and so on.
When choosing a headlamp, there are several key factors to consider: brightness, irradiation distance, battery life, waterproof and dustproof ability. The ideal headlamp should have enough brightness to cope with different lighting needs, good irradiation distance to ensure safety, long battery life to meet the needs of long-term use, and a certain waterproof and dustproof ability to adapt to various environments. In addition, the type of headlamp battery is also an important consideration, you can choose a rechargeable or replaceable battery headlamp, according to the use of habits and needs to choose.
The brightness of the headlamp is usually measured in lumen, and the higher the lumen value, the higher the brightness of the lamp. Waterproof and dustproof rating is also an important indicator of headlamp performance, in general, IPX6 or above waterproof rating can meet the needs of most outdoor activities. When choosing a headlamp, you should also consider its light source type, such as LED, halogen or xenon, etc. Each light source type has its own unique advantages and disadvantages, and is suitable for different scenes and needs.
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