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What does the door open by

Source: admin Release time: 17:30, September 24, 2019 Number of visits: second
Knock on the door What was it that opened it
Application of composite flap door:
The gate is suitable for overflow and check of various pipelines and watercourses of water supply and drainage and sewage treatment projects. It can also be used as various well covers. Only for outlet of unidirectional flow.
Installation and use of composite door:
1. The door device can be connected with flange or welded with embedded plate or secondary casting.
2. When using the floating box door, the specific gravity of the door can be changed by injecting water or draining water into the sealing cavity of the door plate, so as to achieve better opening effect.
3. After the door is installed, the gap between the door and the door is usually 3mm. When the door bears a certain reverse pressure, the gap will decrease and disappear.
4. When using the film, the flow path and sealing ring should not be blocked by stones, branches and other debris, thus affecting the sealing effect.
5. Regularly clean the debris accumulated in the gravel chamber under the door, keep the door ear hole, hinge shaft with good lubrication and flexible opening.
The door is divided into glass steel door, composite door, cast iron door, gate valve, floating bridge door, round door. Gate: mainly installed at the end of the drain pipe with a check valve to prevent backflow of external water. The door material is traditionally made of various metal products, and has developed into a variety of composite materials.
The door is divided into glass steel door, composite door, cast iron door, gate valve, floating bridge door, round door.
Gate: mainly installed at the end of the drain pipe with a check valve to prevent backflow of external water. The door material is traditionally made of various metal products, and has developed into a variety of composite materials. The door is mainly composed of valve seat, valve plate, dense earth seal and hinge. Shapes are divided into circles and squares.
The gate is suitable for overflow and check of various pipelines and canals in water supply and drainage and sewage treatment projects. It is mainly used in the case of low pipeline pressure loss, and is generally directly installed at the pump outlet with high impact resistance. The opening of FRP door is in free falling state and closed naturally due to the pressure difference between the inside and outside of the door.
The FRP door is made of fiber reinforced material with high mechanical strength, and its specific strength can be compared with better alloy steel. FRP door is corrosion resistant and aging resistant. It is installed at the canal or pipeline outlet of water conservancy and municipal environmental protection projects. The glass fiber reinforced plastic flap door has the function of actively opening the water flow and automatically closing the water flow in the reverse direction, so as to prevent the river from flowing backward. Good sealing performance, no manual operation is needed.
FRP doors are only used for round and square outlets with unidirectional flow. The structure is strict and reliable. It does not require manual operation. The opening and closing forces come from the water pressure. When the water pressure in the FRP door is greater than the water pressure outside the door, the valve will open. Then close it. FRP door performance nominal pressure: 0.1mpa-1.0mpa applicable medium: water, river water, river water, sea water, domestic and industrial sewage applicable temperature: ≤ 50 ° C, suitable for water conservancy system, municipal sewage, urban flood control and drainage, sewage treatment plant, water plant, etc

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