Homes without solar power do not need to install a water shut-off valve. Water heater shut-off valves are generally used in domestic water heater channels, including water heater shut-off valves, plastic telescopic flue pipes and flue check valves. The water heater water shut-off valve is also called air outlet, air exhaust outlet and air outlet hood. It comes with the water heater.
What is a water shut-off valve?
1. There are two water pipes for solar water from top to bottom, and the water supply port is on the upper part of the solar water tank. , so the water from solar water heater will not enter drinking water. The water pipe, on the other hand, is on the lower side. If the water pressure is too low, it...
2. There are two water pipes for the water upstream and downstream of the solar power, and onevertical solar water replenishment tank (on the roof) is installed, and when connecting the solar water pipe and the drinking water pipe (main pipe), first. install a water stop valve in the drinking water pipe, then install a mixing valve and connection to the solar water pipes, the water from the solar water heater will not enter the drinking water pipes . (This avoids insufficient water pressure during use, and the water from the solar water heater flows into the drinking water pipe through the mixing valve)
3. There is only one water pipe for solar water upstream and downstream, and it is between the solar water pipe and the drinking water pipe. When connecting water pipes (main pipes), first install a water stop valve in the drinking water pipe, then install a water mixer and connect the solar water pipe. (This prevents the pressure of the water from the heaterffe-solar water to flow into the drinking water pipes through the mixer when the water pressure is insufficient during use, and the water pressure of the solar water heater is insufficient when the water is supplied, thereby causing the water from the solar water heater to flow back into the potable water pipes)
The water shut-off valve (also called a check valve ) refers to a valve whose opening and closing portions are round discs and rely on their own weight and fluid pressure to act to block the reverse flow of fluid.
The function of the check valve in the water supply system of the water pump is to prevent the impact of high pressure water backflow on the impeller of the water pump . When the water pump suddenly stops for any reason during system operation, the pressure in the pump disappears and the high pressure water connected to the outlet of theThe water pump will flow back to the water pump in the opposite direction. When the water pump outlet is equipped with a check valve, it closes immediately to prevent high pressure water from flowing back into the water pump in the opposite direction.
Detailed information:
Depending on the structure, check valves can be divided in lifting. There are three types: check valve, swing check valve and butterfly check valve:
1. Lifting check valve
1. Type: divided into vertical and two types: horizontal.
2. Installation Method: A check valve whose disc slides along the vertical centerline of the valve body. A lift check valve can only be installed on a high pressure horizontal pipeline. , round disc-shaped balls can be used. The upper part of the valve disc and the lower partof the valve cover are processed with guide sleeves. The valve disc guide can be freely raised and lowered into the valve guide. When the fluid flows forward, the valve disc opens by the thrust of. When the fluid stops flowing, the valve disc opens on its own and falls vertically onto the valve seat to prevent the fluid from flowing back.
2. Swing check valve
1. Type: It is divided into three types: single-disc type, double-disc type and multiple-disc type.
2. Installation method: The valve disc of the swing check valve is disc-shaped and rotates around the rotation axis of the valve seat channel. Since the channel in the valve is streamlined, the flow resistance is less than that of. the lifting check valve. It is suitable for large diameter occasions with low flow velocity and flow changest infrequent, but it is not suitable for pulse flow and its sealing performance is not as good as the lifting type.
3. Butterfly check valve
1. Type: Single pass-through type.
2. Installation method: A check valve in which the valve disc rotates around the pin in the valve seat. The disc check valve has a simple structure and can only be installed on horizontal pipelines, so its sealing performance is poor.
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